fix(server): replaces text logo with proper logo

docs: adds images

.github/workflows/deploy.yml

@@ -18,13 +18,13 @@ jobs:
           dotnet-version: '10.0.x'
 
       - name: Restore dependencies
-        run: dotnet restore src/ReverseLlama.Server
+        run: dotnet restore src/Ngino.Server
 
       - name: Build
-        run: dotnet build src/ReverseLlama.Server --configuration Release --no-restore
+        run: dotnet build src/Ngino.Server --configuration Release --no-restore
 
       - name: Publish
-        run: dotnet publish src/ReverseLlama.Server -c Release -o publish
+        run: dotnet publish src/Ngino.Server -c Release -o publish
 
       - name: Copy files to server
         uses: appleboy/scp-action@v1.0.0
@@ -34,7 +34,7 @@ jobs:
           password: ${{ secrets.DEPLOY_SSH_PASSWORD }}
           port: ${{ secrets.DEPLOY_SSH_PORT }}
           source: "publish/*"
-          target: "/var/www/ReverseLlama"
+          target: "/var/www/Ngino"
           strip_components: 1
 
       - name: Restart app
@@ -45,4 +45,4 @@ jobs:
           password: ${{ secrets.DEPLOY_SSH_PASSWORD }}
           port: ${{ secrets.DEPLOY_SSH_PORT }}
           script: |
-            sudo systemctl restart ReverseLlama.service
+            sudo systemctl restart Ngino-server.service

.gitignore

@@ -7,6 +7,7 @@
 *.sqlite-shm
 *.sqlite-wal
 .vs/
-**appsettings.Development.json
+**/appsettings.*.json
 !**/appsettings.Example.json
-debug/**
+debug/**
+publish/**

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+ Everyone is permitted to copy and distribute verbatim copies
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+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Ngino.sln

@@ -5,15 +5,15 @@ VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{827E0CD3-B72D-47B6-A68D-7590B98EB39B}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ReverseLlama.Protocol", "src\ReverseLlama.Protocol\ReverseLlama.Protocol.csproj", "{D85E1D3C-0AC3-4810-8285-16BE903EC8AB}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ngino.Protocol", "src\Ngino.Protocol\Ngino.Protocol.csproj", "{D85E1D3C-0AC3-4810-8285-16BE903EC8AB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ReverseLlama.Server", "src\ReverseLlama.Server\ReverseLlama.Server.csproj", "{FB853CB0-5AEF-4278-82E7-3C8E506F9DFE}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ngino.Server", "src\Ngino.Server\Ngino.Server.csproj", "{FB853CB0-5AEF-4278-82E7-3C8E506F9DFE}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ReverseLlama.Client", "src\ReverseLlama.Client\ReverseLlama.Client.csproj", "{0633EAE6-B82A-4A27-851C-B5D6E11CBE03}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ngino.Client", "src\Ngino.Client\Ngino.Client.csproj", "{0633EAE6-B82A-4A27-851C-B5D6E11CBE03}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{0AB3BF05-4346-4AA6-1389-037BE0695223}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ReverseLlama.Client.Tests", "tests\ReverseLlama.Client.Tests\ReverseLlama.Client.Tests.csproj", "{B03E7794-2888-4B56-A30F-B6C25BCFB89A}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ngino.Client.Tests", "tests\Ngino.Client.Tests\Ngino.Client.Tests.csproj", "{B03E7794-2888-4B56-A30F-B6C25BCFB89A}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

README.md

@@ -1,8 +1,10 @@
-# ReverseLlama
+# <img src="docs/images/Ngino_logo_symbol.png" width="25" alt="logo symbol"/> Ngino
 
-ReverseLlama is a small outbound HTTP tunnel for running Ollama (or vLLM, etc.) on GPU workstations while exposing the API from a server that cannot reach those workstations directly.
+Ngino is a small outbound HTTP tunnel for running Ollama, llama.cpp, vLLM, etc. on GPU workstations while exposing the API from a server that cannot reach those workstations directly.
 
-The client opens and maintains a WebSocket connection to the server. The server accepts normal HTTP requests and forwards them through that WebSocket to the client. The client then calls a local upstream such as `http://localhost:11434` and streams the response back.
+<img src="docs/images/Ngino_logo_full.png" alt="logo symbol"/>
+
+The client opens and maintains a WebSocket connection to the server. The server accepts normal HTTP requests from users and forwards them through that WebSocket to the client. The client then calls a local upstream such as `http://localhost:11434` and streams the response back.
 
 <table>
 <tr>
@@ -13,10 +15,10 @@ The client opens and maintains a WebSocket connection to the server. The server
 
 The server provides
 - An API with
-  - Authentication via API keys
+  - Authentication via user keys
   - Authorization (planned)
-- Load balancing (Scale your AI strategy horizontally!)
+- Load balancing (Scale your AI inferencing horizontally by adding more nodes!)
-- (Ollama-only) Model management (install, remove, load, unload models)
+- (Ollama-based) GGUF Model management (install, remove, load, unload models)
 - Client monitoring
   - Who is active
   - What models are running
@@ -27,7 +29,7 @@ The server provides
   - What clients are mapped to which groups
 - Billing (planned)
   - (planned) Price per model per thousand tokens
-  - (planned) Usage per API user
+  - (planned) Usage per user key
   - (planned) Rate limiting
 
 The client provides a persistent outbound connection to the server and forwards requests to the local Ollama (or vLLM, etc.) instance. Responses stream back through the tunnel with minimal overhead.
@@ -41,35 +43,35 @@ The client provides a persistent outbound connection to the server and forwards
 
 ## Projects
 
-- `src/ReverseLlama.Server`: ASP.NET Core server. Exposes the public proxy endpoint and accepts the outbound client tunnel.
+- `src/Ngino.Server`: ASP.NET Core server. Exposes the public proxy endpoint and accepts the outbound client tunnel.
-- `src/ReverseLlama.Client`: Console client. Runs on the GPU machine and forwards requests to local Ollama.
+- `src/Ngino.Client`: Console client. Runs on the GPU machine and forwards requests to local Ollama.
-- `src/ReverseLlama.Protocol`: Shared tunnel message types.
+- `src/Ngino.Protocol`: Shared tunnel message types.
 
 ## Run
 
 Start the server:
 
 ```powershell
-dotnet run --project src/ReverseLlama.Server --urls http://0.0.0.0:5050 -- --token "change-me"
+dotnet run --project src/Ngino.Server --urls http://0.0.0.0:5050 -- --token "change-me"
 ```
 
 Start the client on the GPU workstation:
 
 ```powershell
-dotnet run --project src/ReverseLlama.Client -- --server http://your-server:5050 --upstream http://localhost:11434 --token "change-me"
+dotnet run --project src/Ngino.Client -- --server http://your-server:5050 --upstream http://localhost:11434 --token "change-me"
 ```
 
 Call Ollama through the server. Model-bearing requests on the root path are routed to a connected client that reports that model, preferring the client with the fewest in-flight requests. You can still address one client explicitly by id:
 
 ```powershell
-curl.exe -H "X-Reverse-Llama-Token: change-me" http://your-server:5050/api/tags
+curl.exe -H "X-Ngino-Token: change-me" http://your-server:5050/api/tags
-curl.exe -H "X-Reverse-Llama-Token: change-me" http://your-server:5050/clients/gpu-01/api/tags
+curl.exe -H "X-Ngino-Token: change-me" http://your-server:5050/clients/gpu-01/api/tags
 curl.exe http://your-server:5050/token/change-me/api/tags
 curl.exe http://your-server:5050/token/change-me/clients/gpu-01/api/tags
 ```
 
 ```powershell
-curl.exe -H "X-Reverse-Llama-Token: change-me" `
+curl.exe -H "X-Ngino-Token: change-me" `
   -H "Content-Type: application/json" `
   -d '{"model":"llama3.1","prompt":"hello"}' `
   http://your-server:5050/api/generate
@@ -79,31 +81,32 @@ curl.exe -H "X-Reverse-Llama-Token: change-me" `
 
 Server options:
 
-- `--token <value>` or `REVERSE_LLAMA_TOKEN`: optional shared token. If set, proxy calls must authenticate with `X-Reverse-Llama-Token`, `Authorization: Bearer <token>`, or the `/token/<token>/...` path prefix.
+- `--token <value>` or `NGINO_TOKEN`: optional shared token. If set, proxy calls must authenticate with `X-Ngino-Token`, `Authorization: Bearer <token>`, or the `/token/<token>/...` path prefix.
-- `--tunnel-path <path>`: defaults to `/_reverse-llama/tunnel`.
+- `--tunnel-path <path>`: defaults to `/_ngino/tunnel`.
-- `--status-path <path>`: defaults to `/_reverse-llama/status`.
+- `--status-path <path>`: defaults to `/_ngino/status`.
-- `--chunk-size <bytes>` or `REVERSE_LLAMA_CHUNK_SIZE`: defaults to `65536`.
+- `--chunk-size <bytes>` or `NGINO_CHUNK_SIZE`: defaults to `65536`.
-- `--embedding-cache-path <path>` or `REVERSE_LLAMA_EMBEDDING_CACHE_PATH`: SQLite cache file for embedding vectors. Defaults to `App_Data\embedding-cache.sqlite` under the server app directory.
+- `--embedding-cache-path <path>` or `NGINO_EMBEDDING_CACHE_PATH`: SQLite cache file for embedding vectors. Defaults to `App_Data\embedding-cache.sqlite` under the server app directory.
-- `--management-database-path <path>` or `REVERSE_LLAMA_MANAGEMENT_DATABASE_PATH`: SQLite database for admin API keys, client disable state, and request/model metrics. Defaults to `App_Data\management.sqlite` under the server app directory.
+- `--management-database-path <path>` or `NGINO_MANAGEMENT_DATABASE_PATH`: SQLite database for admin user keys, client keys, client disable state, and request/model metrics. Defaults to `App_Data\management.sqlite` under the server app directory.
+- `--secure-cookies` or `NGINO_SECURE_COOKIES`: set to `false` to allow admin auth cookies over plain HTTP (for local development). Defaults to `true`.
 
 Admin UI:
 
 - `GET /admin` opens the Keycloak-protected management UI.
 - The temporary Keycloak settings live under `Authentication:Keycloak` in `appsettings.json`.
-- API keys created in the UI are accepted anywhere the shared token is accepted: `X-Reverse-Llama-Token`, `Authorization: Bearer <key>`, `?token=...`, and `/token/<key>/...`.
+- User keys created in the UI are accepted anywhere the shared token is accepted: `X-Ngino-Token`, `Authorization: Bearer <key>`, `?token=...`, and `/token/<key>/...`.
 - Model add/remove/load/unload commands are sent through the connected tunnel client to Ollama (`/api/pull`, `/api/delete`, `/api/generate`, and `/api/show`).
 
 Client options:
 
-- `--server <url>` or `REVERSE_LLAMA_SERVER`: server base URL, for example `http://your-server:5050`.
+- `--server <url>` or `NGINO_SERVER`: server base URL, for example `http://your-server:5050`.
-- `--upstream <url>` or `REVERSE_LLAMA_UPSTREAM`: local Ollama URL, defaults to `http://localhost:11434`.
+- `--upstream <url>` or `NGINO_UPSTREAM`: local Ollama URL, defaults to `http://localhost:11434`.
-- `--token <value>` or `REVERSE_LLAMA_TOKEN`: optional shared token.
+- `--token <value>` or `NGINO_TOKEN`: optional shared token.
-- `--client-id <name>` or `REVERSE_LLAMA_CLIENT_ID`: identifies this machine on the server; defaults to the machine name.
+- `--client-id <name>` or `NGINO_CLIENT_ID`: identifies this machine on the server; defaults to the machine name.
-- `--tunnel-path <path>` or `REVERSE_LLAMA_TUNNEL_PATH`: defaults to `/_reverse-llama/tunnel`.
+- `--tunnel-path <path>` or `NGINO_TUNNEL_PATH`: defaults to `/_ngino/tunnel`.
-- `--reconnect-delay <seconds>` or `REVERSE_LLAMA_RECONNECT_DELAY_SECONDS`: defaults to `5`.
+- `--reconnect-delay <seconds>` or `NGINO_RECONNECT_DELAY_SECONDS`: defaults to `5`.
-- `--chunk-size <bytes>` or `REVERSE_LLAMA_CHUNK_SIZE`: defaults to `65536`.
+- `--chunk-size <bytes>` or `NGINO_CHUNK_SIZE`: defaults to `65536`.
 
-The token is accepted as `X-Reverse-Llama-Token`, as `Authorization: Bearer <token>`, or as a path prefix like `/token/<token>/api/tags` or `/token/<token>/clients/{id}/v1`. The Bearer form lets OpenAI-compatible clients (e.g. n8n's OpenAI nodes pointed at `/clients/{id}/v1`) authenticate with their API-key field. The path-token form is useful for clients that cannot send custom headers. The server strips its own token header/Bearer value and removes the path prefix before forwarding; any other `Authorization` value is forwarded untouched.
+The token is accepted as `X-Ngino-Token`, as `Authorization: Bearer <token>`, or as a path prefix like `/token/<token>/api/tags` or `/token/<token>/clients/{id}/v1`. The Bearer form lets OpenAI-compatible clients (e.g. n8n's OpenAI nodes pointed at `/clients/{id}/v1`) authenticate with their API-key field. The path-token form is useful for clients that cannot send custom headers. The server strips its own token header/Bearer value and removes the path prefix before forwarding; any other `Authorization` value is forwarded untouched.
 
 ## Multiple clients
 
@@ -117,7 +120,7 @@ Any number of machines can connect at the same time; each registers under its cl
 
 ## Embedding cache
 
-The server keeps an in-memory KV cache for embedding vectors and persists it to SQLite. The cache key is the requested `model` plus the exact input text. It applies to `POST /api/embed`, `POST /api/embeddings`, and `POST /v1/embeddings`; cache hits return JSON in the same endpoint family shape and include `X-Reverse-Llama-Embedding-Cache: hit`.
+The server keeps an in-memory KV cache for embedding vectors and persists it to SQLite. The cache key is the requested `model` plus the exact input text. It applies to `POST /api/embed`, `POST /api/embeddings`, and `POST /v1/embeddings`; cache hits return JSON in the same endpoint family shape and include `X-Ngino-Embedding-Cache: hit`.
 
 The authenticated status endpoint reports whether the cache is available, plus the cache count and database path. If SQLite cannot be initialized, proxy traffic continues without embedding-cache writes.
 
@@ -128,12 +131,53 @@ Linux:
 ```bash
 sudo bash deploy/install-client.sh --server http://your-server:5050 --token "change-me"
 ```
+or using ollama models with llama.cpp backend using ROCm:
+```bash
+sudo bash deploy/install-client.sh   --server https://ai.domain.tld   --token "change-me"   --use-llama-cpp-via-docker   --use-ollama-models-path /usr/share/ollama/.ollama/models   --llama-cpp-docker-image ghcr.io/ggml-org/llama.cpp:server-rocm   --llama-cpp-base-port 8081   --llama-cpp-parallel 128
+```
+or using ollama models with llama.cpp backend using CUDA:
+```bash
+sudo bash deploy/install-client.sh   --server https://ai.domain.tld   --token "change-me"   --use-llama-cpp-via-docker   --use-ollama-models-path /usr/share/ollama/.ollama/models   --llama-cpp-docker-image ghcr.io/ggml-org/llama.cpp:server-cuda   --llama-cpp-base-port 8081   --llama-cpp-parallel 128
+```
 
 Options: `--server`, `--token` (required); `--client-id`, `--upstream`, `--install-dir`, `--service-name`, `--no-ollama` (optional). Missing required values are prompted interactively.
 
-The script ensures .NET 10 and Ollama are installed, builds the client self-contained, installs it to `/opt/reversellama-client`, and creates a systemd service (`reversellama-client`). Logs: `journalctl -u reversellama-client -f`.
+llama.cpp via Docker options (replaces Ollama for inferencing):
+
+| Option | Description |
+|--------|-------------|
+| `--use-llama-cpp-via-docker` | Use llama.cpp Docker containers instead of Ollama |
+| `--use-ollama-models-path <dir>` | Path to Ollama models directory (`manifests/blobs`); required with the flag above |
+| `--llama-cpp-docker-image <img>` | Docker image; defaults to auto-detected (rocm/cuda/cpu) |
+| `--llama-cpp-base-port <num>` | Base port for containers; defaults to `8081` |
+| `--llama-cpp-parallel <num>` | llama.cpp parallel slots per container; if unset, llama.cpp's own default is used (which is `1`) |
+| `--llama-cpp-fallback-cooldown <sec>` | Seconds before llama.cpp is retried after a failed container start; defaults to `180` |
+| `--log-dir <dir>` | Directory for log files; defaults to `<app dir>/Logs` |
+
+### llama.cpp fallback to Ollama
+
+Models are served via llama.cpp Docker containers. If a container cannot be started for a model (for example, the model's GGUF blob is incompatible with the llama.cpp build), the client falls back to the Ollama upstream for that model. Transient start failures are remembered for `--llama-cpp-fallback-cooldown` seconds (default 3 minutes) and then retried; a container that starts but exits before becoming ready marks the model as falling back until it is unloaded. `load`/`unload` model commands and on-demand request routing are all covered; a failed container start is detected quickly by watching the container state, and the container log tail is written to the client log to aid debugging.
+
+Note: some hybrid SSM/attention models (e.g. `qwen3.5-coder-next`) are converted by Ollama into a GGUF tensor layout that stock llama.cpp cannot load (`missing tensor 'blk.0.ssm_dt.bias'` and similar). Such models are served via the Ollama fallback above. If you want them to run on llama.cpp instead, use a Hugging Face-converted GGUF (e.g. `unsloth/Qwen3-Coder-Next-GGUF`) rather than the Ollama blob.
+
+The script ensures .NET 10 and Ollama are installed, builds the client self-contained, installs it to `/opt/Ngino-client`, and creates a systemd service (`Ngino-client`). Logs: `journalctl -u Ngino-client -f`.
 
 ## Notes
 
 - Request and response bodies are streamed through the tunnel, which is important for Ollama streaming responses.
-- Use HTTPS or a private network/VPN when exposing this outside a trusted network. The token is simple shared-secret protection, not a full access-control system.
+
+## Security notes
+
+- Use HTTPS or a private network/VPN when exposing this outside a trusted network.
+- **Tokens in URLs** (`/token/<token>/...` and `?token=...`) are logged by web servers (Apache, Nginx, Kestrel), reverse proxies, and browsers (history). Malicious MITM proxies can also read them. Prefer header-based auth (`X-Ngino-Token` or `Authorization: Bearer`) when your client supports it.
+- The token is simple shared-secret protection, not a full access-control system.
+
+## AI Disclosure
+
+This project was architected by humans.
+The code was mostly authored by multiple AI models:
+
+- Claude Fable 5
+- ChatGPT 5.5
+- OpenCode Big Pickle
+- Qwen3-coder-next:latest

deploy/install-client.ps1

@@ -0,0 +1,201 @@
+#Requires -Version 5.1
+#Requires -RunAsAdministrator
+
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory = $false)]
+    [string]$Server,
+
+    [Parameter(Mandatory = $false)]
+    [string]$Token,
+
+    [string]$ClientId = $(if ($env:COMPUTERNAME) { $env:COMPUTERNAME.ToLowerInvariant() } else { "windows-client" }),
+    [string]$Upstream = "http://localhost:11434",
+    [string]$InstallDir = "$env:ProgramFiles\Ngino Client",
+    [string]$ServiceName = "NginoClient",
+    [switch]$InsecureSkipTlsVerify,
+    [switch]$NoOllama,
+    [switch]$UseLlamaCppViaDocker,
+    [string]$UseOllamaModelsPath = "",
+    [string]$LlamaCppDockerImage = "",
+    [int]$LlamaCppBasePort = 0
+)
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+function Write-Info([string]$Message) { Write-Host "[INFO]  $Message" -ForegroundColor Green }
+function Write-Warn([string]$Message) { Write-Host "[WARN]  $Message" -ForegroundColor Yellow }
+
+function Find-DotNet {
+    $command = Get-Command dotnet -ErrorAction SilentlyContinue
+    if ($command) { return $command.Source }
+
+    $candidate = Join-Path $env:ProgramFiles "dotnet\dotnet.exe"
+    if (Test-Path -LiteralPath $candidate) { return $candidate }
+    return $null
+}
+
+function Install-WingetPackage([string]$Id, [string]$Name) {
+    if (-not (Get-Command winget.exe -ErrorAction SilentlyContinue)) {
+        throw "$Name is required but winget is unavailable. Install $Name manually and run this script again."
+    }
+
+    Write-Info "Installing $Name..."
+    & winget.exe install --id $Id --exact --accept-package-agreements --accept-source-agreements --silent
+    if ($LASTEXITCODE -ne 0) { throw "winget failed to install $Name (exit code $LASTEXITCODE)." }
+}
+
+if ([string]::IsNullOrWhiteSpace($Server)) {
+    $Server = Read-Host "Ngino server URL (e.g. http://my-server:5050)"
+}
+if ([string]::IsNullOrWhiteSpace($Server)) { throw "Server URL is required." }
+
+if ([string]::IsNullOrWhiteSpace($Token)) {
+    $secureToken = Read-Host "Server token" -AsSecureString
+    $tokenPointer = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($secureToken)
+    try { $Token = [Runtime.InteropServices.Marshal]::PtrToStringBSTR($tokenPointer) }
+    finally { [Runtime.InteropServices.Marshal]::ZeroFreeBSTR($tokenPointer) }
+}
+if ([string]::IsNullOrWhiteSpace($Token)) { throw "Token is required." }
+
+if ($UseLlamaCppViaDocker -and [string]::IsNullOrWhiteSpace($UseOllamaModelsPath)) {
+    $UseOllamaModelsPath = Read-Host "Ollama models path (e.g. C:\Users\user\.ollama\models)"
+}
+if ($UseLlamaCppViaDocker -and [string]::IsNullOrWhiteSpace($UseOllamaModelsPath)) {
+    throw "Ollama models path is required with -UseLlamaCppViaDocker."
+}
+
+if ($ServiceName -notmatch '^[A-Za-z0-9_.-]+$') { throw "ServiceName contains unsupported characters." }
+
+$scriptDir = $PSScriptRoot
+$repoRoot = Split-Path -Parent $scriptDir
+$clientProject = Join-Path $repoRoot "src\Ngino.Client\Ngino.Client.csproj"
+if (-not (Test-Path -LiteralPath $clientProject)) {
+    throw "Client source not found at $clientProject. Run this script from the repository."
+}
+
+$dotnet = Find-DotNet
+$dotnetVersion = if ($dotnet) { & $dotnet --version } else { $null }
+if (-not $dotnetVersion -or -not $dotnetVersion.StartsWith("10.")) {
+    if ($dotnetVersion) { Write-Warn "dotnet $dotnetVersion is installed, but version 10.x is required." }
+    Install-WingetPackage "Microsoft.DotNet.SDK.10" ".NET 10 SDK"
+    $dotnet = Find-DotNet
+    if (-not $dotnet) { throw ".NET was installed, but dotnet.exe could not be found." }
+    $dotnetVersion = & $dotnet --version
+}
+Write-Info "Using dotnet $dotnetVersion ($dotnet)."
+
+if ($NoOllama) {
+    Write-Info "Skipping Ollama check (-NoOllama)."
+} else {
+    $ollama = Get-Command ollama.exe -ErrorAction SilentlyContinue
+    if (-not $ollama) {
+        $ollamaCandidate = Join-Path $env:LOCALAPPDATA "Programs\Ollama\ollama.exe"
+        if (Test-Path -LiteralPath $ollamaCandidate) { $ollama = Get-Item $ollamaCandidate }
+    }
+    if (-not $ollama) {
+        Install-WingetPackage "Ollama.Ollama" "Ollama"
+        $ollamaCandidate = Join-Path $env:LOCALAPPDATA "Programs\Ollama\ollama.exe"
+        if (Test-Path -LiteralPath $ollamaCandidate) { $ollama = Get-Item $ollamaCandidate }
+    }
+    if (-not $ollama) { Write-Warn "Ollama was installed, but ollama.exe was not found in the current session." }
+    else {
+        $ollamaPath = if ($ollama.Source) { $ollama.Source } elseif ($ollama.FullName) { $ollama.FullName } else { $ollama.Path }
+        Write-Info "Ollama is installed ($ollamaPath)."
+    }
+}
+
+$architecture = $env:PROCESSOR_ARCHITECTURE
+$runtimeId = switch ($architecture) {
+    { $_ -in "AMD64", "x64" } { "win-x64"; break }
+    { $_ -in "ARM64", "Arm64" } { "win-arm64"; break }
+    { $_ -in "x86", "X86" } { "win-x86"; break }
+    default { throw "Unsupported architecture: $architecture" }
+}
+
+$buildDir = Join-Path ([IO.Path]::GetTempPath()) ("ngino-build-" + [Guid]::NewGuid().ToString("N"))
+New-Item -ItemType Directory -Path $buildDir | Out-Null
+try {
+    Write-Info "Building Ngino client (self-contained, $runtimeId)..."
+    & $dotnet publish $clientProject -c Release -r $runtimeId --self-contained true -o $buildDir
+    if ($LASTEXITCODE -ne 0) { throw "dotnet publish failed (exit code $LASTEXITCODE)." }
+
+    $executable = Join-Path $buildDir "Ngino.Client.exe"
+    if (-not (Test-Path -LiteralPath $executable)) { throw "Build failed: Ngino.Client.exe was not produced." }
+
+    $existingService = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
+    if ($existingService -and $existingService.Status -ne "Stopped") {
+        Write-Info "Stopping existing service $ServiceName..."
+        Stop-Service -Name $ServiceName -Force
+        (Get-Service -Name $ServiceName).WaitForStatus("Stopped", [TimeSpan]::FromSeconds(30))
+    }
+
+    Write-Info "Installing to $InstallDir..."
+    New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
+    Copy-Item -Path (Join-Path $buildDir "*") -Destination $InstallDir -Recurse -Force
+} finally {
+    if (Test-Path -LiteralPath $buildDir) { Remove-Item -LiteralPath $buildDir -Recurse -Force }
+}
+
+$installedExecutable = Join-Path $InstallDir "Ngino.Client.exe"
+$binaryPath = '"{0}"' -f $installedExecutable
+if (-not (Get-Service -Name $ServiceName -ErrorAction SilentlyContinue)) {
+    Write-Info "Creating Windows service $ServiceName..."
+    & sc.exe create $ServiceName "binPath=" $binaryPath "start=" "auto" "DisplayName=" "Ngino Tunnel Client"
+    if ($LASTEXITCODE -ne 0) { throw "Could not create Windows service $ServiceName." }
+} else {
+    & sc.exe config $ServiceName "binPath=" $binaryPath "start=" "auto" "DisplayName=" "Ngino Tunnel Client" | Out-Null
+    if ($LASTEXITCODE -ne 0) { throw "Could not update Windows service $ServiceName." }
+}
+
+# A service-specific environment keeps the token out of the process command line.
+$serviceRegistryPath = "HKLM:\SYSTEM\CurrentControlSet\Services\$ServiceName"
+$insecureTlsValue = $InsecureSkipTlsVerify.IsPresent.ToString().ToLowerInvariant()
+$serviceEnvironment = @(
+    "NGINO_SERVER=$Server",
+    "NGINO_TOKEN=$Token",
+    "NGINO_CLIENT_ID=$ClientId",
+    "NGINO_UPSTREAM=$Upstream",
+    "NGINO_INSECURE_SKIP_TLS_VERIFY=$insecureTlsValue",
+    "DOTNET_CLI_TELEMETRY_OPTOUT=1",
+    "DOTNET_NOLOGO=1"
+)
+if ($UseLlamaCppViaDocker) {
+    $serviceEnvironment += "NGINO_USE_LLAMA_CPP_VIA_DOCKER=true"
+    if (-not [string]::IsNullOrWhiteSpace($UseOllamaModelsPath)) {
+        $serviceEnvironment += "NGINO_USE_OLLAMA_MODELS_PATH=$UseOllamaModelsPath"
+    }
+    if (-not [string]::IsNullOrWhiteSpace($LlamaCppDockerImage)) {
+        $serviceEnvironment += "NGINO_LLAMA_CPP_DOCKER_IMAGE=$LlamaCppDockerImage"
+    }
+    if ($LlamaCppBasePort -gt 0) {
+        $serviceEnvironment += "NGINO_LLAMA_CPP_BASE_PORT=$LlamaCppBasePort"
+    }
+}
+if ($InsecureSkipTlsVerify) {
+    Write-Warn "Server TLS certificate validation is disabled for $ServiceName."
+}
+New-ItemProperty -Path $serviceRegistryPath -Name Environment -PropertyType MultiString -Value $serviceEnvironment -Force | Out-Null
+& sc.exe description $ServiceName "Ngino outbound tunnel client" | Out-Null
+& sc.exe failure $ServiceName "reset=" "86400" "actions=" "restart/5000/restart/5000/restart/5000" | Out-Null
+
+Start-Service -Name $ServiceName
+$service = Get-Service -Name $ServiceName
+try { $service.WaitForStatus("Running", [TimeSpan]::FromSeconds(15)) } catch { }
+if ($service.Status -eq "Running") { Write-Info "Service $ServiceName is running." }
+else { Write-Warn "Service $ServiceName did not reach Running state. Check: Get-WinEvent -LogName Application" }
+
+Write-Host ""
+Write-Info "Installation complete."
+Write-Host "  Server:      $Server"
+Write-Host "  Client ID:   $ClientId"
+Write-Host "  Upstream:    $Upstream"
+Write-Host "  Service:     $ServiceName"
+Write-Host "  Install dir: $InstallDir"
+if ($UseLlamaCppViaDocker) {
+    Write-Host "  llama.cpp:   enabled (models: $UseOllamaModelsPath)"
+}
+Write-Host ""
+Write-Host "  Manage:  Get-Service $ServiceName | Start-Service/Stop-Service/Restart-Service"
+Write-Host "  Logs:    Get-WinEvent -LogName Application | Where-Object ProviderName -eq NginoClient"

deploy/install-client.sh

@@ -2,8 +2,8 @@
 set -euo pipefail
 
 # ── Defaults ──────────────────────────────────────────────────────────────────
-DEFAULT_INSTALL_DIR="/opt/reversellama-client"
+DEFAULT_INSTALL_DIR="/opt/ngino-client"
-DEFAULT_SERVICE_NAME="reversellama-client"
+DEFAULT_SERVICE_NAME="ngino-client"
 DEFAULT_UPSTREAM="http://localhost:11434"
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -16,6 +16,13 @@ TOKEN=""
 CLIENT_ID="$(hostname -s 2>/dev/null || echo "linux-client")"
 UPSTREAM="$DEFAULT_UPSTREAM"
 SKIP_OLLAMA=false
+USE_LLAMA_CPP_VIA_DOCKER=false
+USE_OLLAMA_MODELS_PATH=""
+LLAMA_CPP_DOCKER_IMAGE=""
+LLAMA_CPP_BASE_PORT=""
+LLAMA_CPP_PARALLEL=""
+LLAMA_CPP_FALLBACK_COOLDOWN=""
+LOG_DIR=""
 
 # ── Colors ────────────────────────────────────────────────────────────────────
 RED='\033[0;31m'
@@ -33,10 +40,10 @@ usage() {
     cat <<EOF
 Usage: $0 [OPTIONS]
 
-Installs the ReverseLlama client as a systemd service on Linux.
+Installs the Ngino client as a systemd service on Linux.
 
 Required:
-  --server <url>       ReverseLlama server URL (e.g. http://my-server:5050)
+  --server <url>       Ngino server URL (e.g. http://my-server:5050)
   --token <value>      Shared secret token for the server
 
 Optional:
@@ -45,11 +52,27 @@ Optional:
   --install-dir <dir>  Install directory; defaults to $DEFAULT_INSTALL_DIR
   --service-name <n>   systemd service name; defaults to $DEFAULT_SERVICE_NAME
   --no-ollama          Skip Ollama installation and status check
+  --use-llama-cpp-via-docker
+                       Use llama.cpp via Docker for inference instead of Ollama
+  --use-ollama-models-path <dir>
+                       Path to Ollama models directory (manifests/blobs); required with --use-llama-cpp-via-docker
+  --llama-cpp-docker-image <img>
+                       llama.cpp Docker image; defaults to auto-detected (rocm/cuda/cpu)
+  --llama-cpp-base-port <num>
+                       Base port for llama.cpp containers; defaults to 8081
+  --llama-cpp-parallel <num>
+                       llama.cpp parallel slots per container; if unset, llama.cpp's own default is used
+  --llama-cpp-fallback-cooldown <sec>
+                       Seconds before llama.cpp is retried after a failed container start; defaults to 180
+  --log-dir <dir>      Directory for log files; defaults to <install-dir>/Logs
   -h, --help           Show this help message
 
 Examples:
   $0 --server http://gpu-server:5050 --token "my-secret"
   $0 --server http://gpu-server:5050 --token "my-secret" --no-ollama
+  $0 --server http://gpu-server:5050 --token "my-secret" \\
+     --use-llama-cpp-via-docker --use-ollama-models-path /usr/share/ollama/.ollama/models \\
+     --llama-cpp-parallel 128
 EOF
     exit 0
 }
@@ -57,21 +80,28 @@ EOF
 # ── Argument parsing ──────────────────────────────────────────────────────────
 while [[ $# -gt 0 ]]; do
     case "$1" in
-        --server)       SERVER_URL="$2"; shift 2 ;;
+        --server)                   SERVER_URL="$2"; shift 2 ;;
-        --token)        TOKEN="$2"; shift 2 ;;
+        --token)                    TOKEN="$2"; shift 2 ;;
-        --client-id)    CLIENT_ID="$2"; shift 2 ;;
+        --client-id)                CLIENT_ID="$2"; shift 2 ;;
-        --upstream)     UPSTREAM="$2"; shift 2 ;;
+        --upstream)                 UPSTREAM="$2"; shift 2 ;;
-        --install-dir)  INSTALL_DIR="$2"; shift 2 ;;
+        --install-dir)              INSTALL_DIR="$2"; shift 2 ;;
-        --service-name) SERVICE_NAME="$2"; shift 2 ;;
+        --service-name)             SERVICE_NAME="$2"; shift 2 ;;
-        --no-ollama)    SKIP_OLLAMA=true; shift ;;
+        --no-ollama)                SKIP_OLLAMA=true; shift ;;
-        -h|--help)      usage ;;
+        --use-llama-cpp-via-docker) USE_LLAMA_CPP_VIA_DOCKER=true; shift ;;
-        *)              die "Unknown option: $1" ;;
+        --use-ollama-models-path)   USE_OLLAMA_MODELS_PATH="$2"; shift 2 ;;
+        --llama-cpp-docker-image)   LLAMA_CPP_DOCKER_IMAGE="$2"; shift 2 ;;
+        --llama-cpp-base-port)      LLAMA_CPP_BASE_PORT="$2"; shift 2 ;;
+        --llama-cpp-parallel)       LLAMA_CPP_PARALLEL="$2"; shift 2 ;;
+        --llama-cpp-fallback-cooldown) LLAMA_CPP_FALLBACK_COOLDOWN="$2"; shift 2 ;;
+        --log-dir)                  LOG_DIR="$2"; shift 2 ;;
+        -h|--help)                  usage ;;
+        *)                          die "Unknown option: $1" ;;
     esac
 done
 
 # ── Prompt for missing required values ───────────────────────────────────────
 if [[ -z "$SERVER_URL" ]]; then
-    read -rp "ReverseLlama server URL (e.g. http://my-server:5050): " SERVER_URL
+    read -rp "Ngino server URL (e.g. http://my-server:5050): " SERVER_URL
 fi
 if [[ -z "$SERVER_URL" ]]; then
     die "Server URL is required."
@@ -85,6 +115,13 @@ if [[ -z "$TOKEN" ]]; then
     die "Token is required."
 fi
 
+if [[ "$USE_LLAMA_CPP_VIA_DOCKER" == "true" && -z "$USE_OLLAMA_MODELS_PATH" ]]; then
+    read -rp "Ollama models path (e.g. /usr/share/ollama/.ollama/models): " USE_OLLAMA_MODELS_PATH
+fi
+if [[ "$USE_LLAMA_CPP_VIA_DOCKER" == "true" && -z "$USE_OLLAMA_MODELS_PATH" ]]; then
+    die "Ollama models path is required with --use-llama-cpp-via-docker."
+fi
+
 # ── Root check ────────────────────────────────────────────────────────────────
 if [[ $EUID -ne 0 ]]; then
     die "This script must be run as root (or with sudo)."
@@ -225,7 +262,7 @@ else
 fi
 
 # ── Build client from source ─────────────────────────────────────────────────
-CLIENT_SRC="$REPO_ROOT/src/ReverseLlama.Client"
+CLIENT_SRC="$REPO_ROOT/src/Ngino.Client"
 if [[ ! -d "$CLIENT_SRC" ]]; then
     die "Client source not found at $CLIENT_SRC. Run this script from the repository or pass --install-dir."
 fi
@@ -238,53 +275,87 @@ case "$ARCH" in
     *)       die "Unsupported architecture: $ARCH" ;;
 esac
 
-info "Building ReverseLlama client (self-contained, $DOTNET_RID)..."
+info "Building Ngino client (self-contained, $DOTNET_RID)..."
-BUILD_DIR="$(mktemp -d /tmp/reversellama-build.XXXXXX)"
+BUILD_DIR="$(mktemp -d /tmp/ngino-build.XXXXXX)"
 trap 'rm -rf "$BUILD_DIR"' EXIT
 
-"$DOTNET_CMD" publish "$CLIENT_SRC/ReverseLlama.Client.csproj" \
+"$DOTNET_CMD" publish "$CLIENT_SRC/Ngino.Client.csproj" \
     -c Release \
     -r "$DOTNET_RID" \
     --self-contained true \
     -o "$BUILD_DIR"
 
-if [[ ! -f "$BUILD_DIR/ReverseLlama.Client" ]]; then
+if [[ ! -f "$BUILD_DIR/Ngino.Client" ]]; then
-    die "Build failed. ReverseLlama.Client binary not found in output."
+    die "Build failed. Ngino.Client binary not found in output."
 fi
 
 info "Build successful."
 
+# ── Stop existing service before overwriting binary ─────────────────────────
+SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
+
+if systemctl list-unit-files "$SERVICE_NAME.service" &>/dev/null 2>&1 || systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
+    info "Stopping existing service $SERVICE_NAME..."
+    systemctl stop "$SERVICE_NAME" 2>/dev/null || true
+fi
+
 # ── Install ───────────────────────────────────────────────────────────────────
 info "Installing to $INSTALL_DIR..."
 mkdir -p "$INSTALL_DIR"
 cp -a "$BUILD_DIR"/. "$INSTALL_DIR/"
-chmod +x "$INSTALL_DIR/ReverseLlama.Client"
+chmod +x "$INSTALL_DIR/Ngino.Client"
 
 info "Client installed to $INSTALL_DIR."
 
+# ── Write environment file (avoids shell injection in unit file) ─────────────
+ENV_DIR="/etc/ngino-client"
+mkdir -p "$ENV_DIR"
+{
+    printf 'NGINO_TOKEN=%s\n' "$TOKEN"
+    if [[ "$USE_LLAMA_CPP_VIA_DOCKER" == "true" ]]; then
+        printf 'NGINO_USE_LLAMA_CPP_VIA_DOCKER=true\n'
+        if [[ -n "$USE_OLLAMA_MODELS_PATH" ]]; then
+            printf 'NGINO_USE_OLLAMA_MODELS_PATH=%s\n' "$USE_OLLAMA_MODELS_PATH"
+        fi
+        if [[ -n "$LLAMA_CPP_DOCKER_IMAGE" ]]; then
+            printf 'NGINO_LLAMA_CPP_DOCKER_IMAGE=%s\n' "$LLAMA_CPP_DOCKER_IMAGE"
+        fi
+        if [[ -n "$LLAMA_CPP_BASE_PORT" ]]; then
+            printf 'NGINO_LLAMA_CPP_BASE_PORT=%s\n' "$LLAMA_CPP_BASE_PORT"
+        fi
+        if [[ -n "$LLAMA_CPP_PARALLEL" ]]; then
+            printf 'NGINO_LLAMA_CPP_PARALLEL=%s\n' "$LLAMA_CPP_PARALLEL"
+        fi
+        if [[ -n "$LLAMA_CPP_FALLBACK_COOLDOWN" ]]; then
+            printf 'NGINO_LLAMA_CPP_FALLBACK_COOLDOWN_SECONDS=%s\n' "$LLAMA_CPP_FALLBACK_COOLDOWN"
+        fi
+    fi
+    if [[ -n "$LOG_DIR" ]]; then
+        printf 'NGINO_LOG_DIR=%s\n' "$LOG_DIR"
+    fi
+} > "$ENV_DIR/env"
+chmod 600 "$ENV_DIR/env"
+info "Environment file written to $ENV_DIR/env (mode 0600)."
+
 # ── Create systemd service ───────────────────────────────────────────────────
 SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
 
-if systemctl list-unit-files "$SERVICE_NAME.service" &>/dev/null 2>&1; then
-    info "Stopping existing service $SERVICE_NAME..."
-    systemctl stop "$SERVICE_NAME" 2>/dev/null || true
-fi
-
 cat > "$SERVICE_FILE" <<EOF
 [Unit]
-Description=ReverseLlama Tunnel Client
+Description=Ngino Tunnel Client
-After=network-online.target
+After=network-online.target docker.service
-Wants=network-online.target
+Wants=network-online.target docker.service
 $([ "$SKIP_OLLAMA" = "false" ] && echo "After=ollama.service")
 $([ "$SKIP_OLLAMA" = "false" ] && echo "Wants=ollama.service")
 
 [Service]
 Type=simple
-ExecStart=$INSTALL_DIR/ReverseLlama.Client --server "$SERVER_URL" --upstream "$UPSTREAM" --token "$TOKEN" --client-id "$CLIENT_ID"
+ExecStart=$INSTALL_DIR/Ngino.Client --server "$SERVER_URL" --upstream "$UPSTREAM" --client-id "$CLIENT_ID"
 Restart=always
 RestartSec=5
 Environment=DOTNET_CLI_TELEMETRY_OPTOUT=1
 Environment=DOTNET_NOLOGO=1
+EnvironmentFile=$ENV_DIR/env
 WorkingDirectory=$INSTALL_DIR
 
 [Install]
@@ -310,6 +381,9 @@ echo "  Client ID:   $CLIENT_ID"
 echo "  Upstream:    $UPSTREAM"
 echo "  Service:     $SERVICE_NAME"
 echo "  Install dir: $INSTALL_DIR"
+if [[ "$USE_LLAMA_CPP_VIA_DOCKER" == "true" ]]; then
+    echo "  llama.cpp:   enabled (models: $USE_OLLAMA_MODELS_PATH)"
+fi
 echo
 echo "  Manage:  systemctl {start|stop|restart|status} $SERVICE_NAME"
 echo "  Logs:    journalctl -u $SERVICE_NAME -f"

deploy/uninstall-client.ps1

@@ -0,0 +1,42 @@
+#Requires -Version 5.1
+#Requires -RunAsAdministrator
+
+[CmdletBinding()]
+param(
+    [string]$InstallDir = "$env:ProgramFiles\Ngino Client",
+    [string]$ServiceName = "NginoClient"
+)
+
+$ErrorActionPreference = "Stop"
+
+function Write-Info([string]$Message) { Write-Host "[INFO]  $Message" -ForegroundColor Green }
+
+if ($ServiceName -notmatch '^[A-Za-z0-9_.-]+$') { throw "ServiceName contains unsupported characters." }
+
+# ── Stop and delete the Windows service ───────────────────────────────────────
+$service = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
+if ($service) {
+    if ($service.Status -ne "Stopped") {
+        Write-Info "Stopping service $ServiceName..."
+        Stop-Service -Name $ServiceName -Force
+        $service.WaitForStatus("Stopped", [TimeSpan]::FromSeconds(30))
+    }
+    Write-Info "Deleting service $ServiceName..."
+    & sc.exe delete $ServiceName
+    if ($LASTEXITCODE -ne 0) { throw "Could not delete Windows service $ServiceName." }
+} else {
+    Write-Info "Service $ServiceName does not exist; skipping."
+}
+
+# ── Remove install directory ──────────────────────────────────────────────────
+if (Test-Path -LiteralPath $InstallDir) {
+    Write-Info "Removing install directory $InstallDir..."
+    Remove-Item -LiteralPath $InstallDir -Recurse -Force
+} else {
+    Write-Info "Install directory $InstallDir does not exist; skipping."
+}
+
+Write-Host ""
+Write-Info "Uninstall complete."
+Write-Host "  Service:     $ServiceName (stopped and deleted)"
+Write-Host "  Install dir: $InstallDir (removed)"

deploy/uninstall-client.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ── Defaults ──────────────────────────────────────────────────────────────────
+DEFAULT_INSTALL_DIR="/opt/ngino-client"
+DEFAULT_SERVICE_NAME="ngino-client"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+INSTALL_DIR="$DEFAULT_INSTALL_DIR"
+SERVICE_NAME="$DEFAULT_SERVICE_NAME"
+
+# ── Colors ────────────────────────────────────────────────────────────────────
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+NC='\033[0m'
+
+info()    { echo -e "${GREEN}[INFO]${NC}  $*"; }
+warn()    { echo -e "${YELLOW}[WARN]${NC}  $*"; }
+err()     { echo -e "${RED}[ERROR]${NC} $*" >&2; }
+die()     { err "$@"; exit 1; }
+
+# ── Usage ─────────────────────────────────────────────────────────────────────
+usage() {
+    cat <<EOF
+Usage: $0 [OPTIONS]
+
+Uninstalls the Ngino client systemd service and removes its files.
+Does NOT remove .NET SDK, Ollama, or Docker.
+
+Optional:
+  --install-dir <dir>  Install directory; defaults to $DEFAULT_INSTALL_DIR
+  --service-name <n>   systemd service name; defaults to $DEFAULT_SERVICE_NAME
+  -h, --help           Show this help message
+
+Examples:
+  $0
+  $0 --install-dir /opt/ngino-client --service-name ngino-client
+EOF
+    exit 0
+}
+
+# ── Argument parsing ──────────────────────────────────────────────────────────
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --install-dir)              INSTALL_DIR="$2"; shift 2 ;;
+        --service-name)             SERVICE_NAME="$2"; shift 2 ;;
+        -h|--help)                  usage ;;
+        *)                          die "Unknown option: $1" ;;
+    esac
+done
+
+# ── Root check ────────────────────────────────────────────────────────────────
+if [[ $EUID -ne 0 ]]; then
+    die "This script must be run as root (or with sudo)."
+fi
+
+SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
+ENV_DIR="/etc/ngino-client"
+
+# ── Stop and disable the service ──────────────────────────────────────────────
+if systemctl list-unit-files "$SERVICE_NAME.service" &>/dev/null 2>&1; then
+    info "Stopping service $SERVICE_NAME..."
+    systemctl stop "$SERVICE_NAME" 2>/dev/null || true
+    info "Disabling service $SERVICE_NAME..."
+    systemctl disable "$SERVICE_NAME" 2>/dev/null || true
+fi
+
+# ── Remove service unit file ──────────────────────────────────────────────────
+if [[ -f "$SERVICE_FILE" ]]; then
+    info "Removing service unit file $SERVICE_FILE..."
+    rm -f "$SERVICE_FILE"
+fi
+
+systemctl daemon-reload
+
+# ── Remove install directory ──────────────────────────────────────────────────
+if [[ -d "$INSTALL_DIR" ]]; then
+    info "Removing install directory $INSTALL_DIR..."
+    rm -rf "$INSTALL_DIR"
+fi
+
+# ── Remove environment file ───────────────────────────────────────────────────
+if [[ -d "$ENV_DIR" ]]; then
+    info "Removing environment directory $ENV_DIR..."
+    rm -rf "$ENV_DIR"
+fi
+
+# ── Done ──────────────────────────────────────────────────────────────────────
+echo
+info "Uninstall complete."
+echo "  Service:     $SERVICE_NAME (stopped, disabled, unit removed)"
+echo "  Install dir: $INSTALL_DIR (removed)"
+echo "  Env dir:     $ENV_DIR (removed)"

docs/Screenshots.md

@@ -2,5 +2,5 @@
 ![Screenshot of the backend - clients view](images/Screenshots_website_clients.png)
 # Models view
 ![Screenshot of the backend - models view](images/Screenshots_website_models.png)
-# API Keys view
+# User Keys view
-![Screenshot of the backend - api keys view](images/Screenshots_website_apikeys.png)
+![Screenshot of the backend - user keys view](images/Screenshots_website_apikeys.png)

docs/images/Ngino_logo.svg

@@ -0,0 +1,332 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 1280 720"
+   role="img"
+   aria-labelledby="title desc"
+   version="1.1"
+   id="svg10"
+   sodipodi:docname="Ngino_logo.svg"
+   xml:space="preserve"
+   inkscape:version="1.4.3 (0d15f75042, 2025-12-25)"
+   inkscape:export-filename="Ngino_logo_full_dark.png"
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+         sodipodi:role="line"
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+       xml:space="preserve"
+       style="font-weight:900;font-size:170.667px;line-height:1.25;font-family:Montserrat;-inkscape-font-specification:'Montserrat, Heavy';display:inline;fill:#000000;fill-opacity:1"
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+         sodipodi:role="line"
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+     id="metadata215"><rdf:RDF><cc:Work
+         rdf:about=""><dc:title>Ngino logo</dc:title></cc:Work></rdf:RDF></metadata></svg>

docs/licenses/LICENSE.morphdom

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Patrick Steele-Idem <pnidem@gmail.com> (psteeleidem.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

src/Ngino.Client/ChannelHttpContent.cs

@@ -1,7 +1,7 @@
 using System.Net;
 using System.Threading.Channels;
 
-namespace ReverseLlama.Client;
+namespace Ngino.Client;
 
 internal sealed class ChannelHttpContent : HttpContent
 {

src/Ngino.Client/ClientOptions.cs

@@ -0,0 +1,212 @@
+using Ngino.Protocol;
+
+namespace Ngino.Client;
+
+internal sealed class ClientOptions
+{
+    public Uri Server { get; init; } = new("http://localhost:5001");
+
+    public Uri Upstream { get; init; } = new("http://localhost:11434");
+
+    public string TunnelPath { get; init; } = ProtocolConstants.DefaultTunnelPath;
+
+    public string? Token { get; init; }
+
+    public string ClientId { get; init; } = Environment.MachineName.ToLowerInvariant();
+
+    public TimeSpan ReconnectDelay { get; init; } = TimeSpan.FromSeconds(5);
+
+    public int ChunkSize { get; init; } = 64 * 1024;
+
+    public bool InsecureSkipTlsVerify { get; init; }
+
+    public bool UseLlamaCppViaDocker { get; init; }
+
+    public string? UseOllamaModelsPath { get; init; }
+
+    public string? LlamaCppDockerImage { get; init; }
+
+    public int LlamaCppBasePort { get; init; } = 8081;
+
+    public int? LlamaCppParallel { get; init; }
+
+    public TimeSpan LlamaCppFallbackCooldown { get; init; } = TimeSpan.FromMinutes(3);
+
+    public string? LogDirectory { get; init; }
+
+    public Uri TunnelUri
+    {
+        get
+        {
+            var builder = new UriBuilder(Server);
+            builder.Scheme = builder.Scheme.ToLowerInvariant() switch
+            {
+                "http" => "ws",
+                "https" => "wss",
+                "ws" => "ws",
+                "wss" => "wss",
+                var unsupported => throw new InvalidOperationException($"Unsupported server URI scheme '{unsupported}'. Use http, https, ws, or wss.")
+            };
+
+            if (string.IsNullOrWhiteSpace(builder.Path) || builder.Path == "/")
+            {
+                builder.Path = NormalizePath(TunnelPath);
+            }
+
+            return builder.Uri;
+        }
+    }
+
+    public static ClientOptions Parse(string[] args)
+    {
+        var values = ParseArgs(args);
+
+        return new ClientOptions
+        {
+            Server = ReadUri(values, "server", "NGINO_SERVER", "http://localhost:5001"),
+            Upstream = ReadUri(values, "upstream", "NGINO_UPSTREAM", "http://localhost:11434"),
+            TunnelPath = NormalizePath(Read(values, "tunnel-path", "NGINO_TUNNEL_PATH") ?? ProtocolConstants.DefaultTunnelPath),
+            Token = Read(values, "token", "NGINO_TOKEN"),
+            ClientId = Read(values, "client-id", "NGINO_CLIENT_ID") ?? Environment.MachineName.ToLowerInvariant(),
+            ReconnectDelay = TimeSpan.FromSeconds(ReadInt(values, 5, "reconnect-delay", "NGINO_RECONNECT_DELAY_SECONDS")),
+            ChunkSize = ReadInt(values, 64 * 1024, "chunk-size", "NGINO_CHUNK_SIZE"),
+            InsecureSkipTlsVerify = ReadBool(values, false, "insecure-skip-tls-verify", "NGINO_INSECURE_SKIP_TLS_VERIFY"),
+            UseLlamaCppViaDocker = ReadBool(values, false, "use-llama-cpp-via-docker", "NGINO_USE_LLAMA_CPP_VIA_DOCKER"),
+            UseOllamaModelsPath = NormalizeDirectoryPath(Read(values, "use-ollama-models-path", "NGINO_USE_OLLAMA_MODELS_PATH")),
+            LlamaCppDockerImage = Read(values, "llama-cpp-docker-image", "NGINO_LLAMA_CPP_DOCKER_IMAGE"),
+            LlamaCppBasePort = ReadInt(values, 8081, "llama-cpp-base-port", "NGINO_LLAMA_CPP_BASE_PORT"),
+            LlamaCppParallel = ReadOptionalInt(values, "llama-cpp-parallel", "NGINO_LLAMA_CPP_PARALLEL"),
+            LlamaCppFallbackCooldown = TimeSpan.FromSeconds(ReadInt(values, 180, "llama-cpp-fallback-cooldown", "NGINO_LLAMA_CPP_FALLBACK_COOLDOWN_SECONDS")),
+            LogDirectory = NormalizeDirectoryPath(Read(values, "log-dir", "NGINO_LOG_DIR"))
+        };
+    }
+
+    public static string Usage =>
+        """
+        Ngino.Client options:
+          --server <url>                 Server base URL, e.g. http://my-server:5050
+          --upstream <url>               Local upstream URL, e.g. http://localhost:11434
+          --token <value>                Optional token matching the server
+          --client-id <name>             Identifies this machine on the server; defaults to the machine name
+          --tunnel-path <path>           Defaults to /_ngino/tunnel
+          --reconnect-delay <sec>        Defaults to 5
+          --chunk-size <bytes>           Defaults to 65536
+          --insecure-skip-tls-verify     Disable server TLS certificate validation (unsafe)
+          --use-llama-cpp-via-docker     Use llama.cpp via Docker for inference instead of Ollama
+          --use-ollama-models-path <dir> Path to Ollama models directory (manifests/blobs), required with --use-llama-cpp-via-docker
+          --llama-cpp-docker-image <img> llama.cpp Docker image; defaults to auto-detected (rocm/cuda/cpu)
+          --llama-cpp-base-port <num>    Base port for llama.cpp containers; defaults to 8081
+          --llama-cpp-parallel <num>     llama.cpp parallel slots per container; if unset, llama.cpp's own default is used
+          --llama-cpp-fallback-cooldown <sec>
+                                         Seconds before llama.cpp is retried after a failed container start; defaults to 180
+          --log-dir <dir>                Directory for log files; defaults to <app dir>/Logs
+        """;
+
+    private static Dictionary<string, string> ParseArgs(string[] args)
+    {
+        var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+
+        for (var i = 0; i < args.Length; i++)
+        {
+            var arg = args[i];
+            if (!arg.StartsWith("--", StringComparison.Ordinal))
+            {
+                throw new ArgumentException($"Unexpected argument '{arg}'.");
+            }
+
+            var keyValue = arg[2..].Split('=', 2);
+            if (keyValue.Length == 2)
+            {
+                values[keyValue[0]] = keyValue[1];
+                continue;
+            }
+
+            if (IsBoolFlag(keyValue[0]))
+            {
+                values[keyValue[0]] = "true";
+                continue;
+            }
+
+            if (i + 1 >= args.Length || args[i + 1].StartsWith("--", StringComparison.Ordinal))
+            {
+                throw new ArgumentException($"Missing value for '{arg}'.");
+            }
+
+            values[keyValue[0]] = args[++i];
+        }
+
+        return values;
+    }
+
+    private static bool IsBoolFlag(string key)
+    {
+        return key switch
+        {
+            "insecure-skip-tls-verify" => true,
+            "use-llama-cpp-via-docker" => true,
+            _ => false
+        };
+    }
+
+    private static string? Read(Dictionary<string, string> values, params string[] keys)
+    {
+        foreach (var key in keys)
+        {
+            if (values.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value))
+            {
+                return value;
+            }
+
+            value = Environment.GetEnvironmentVariable(key);
+            if (!string.IsNullOrWhiteSpace(value))
+            {
+                return value;
+            }
+        }
+
+        return null;
+    }
+
+    private static int ReadInt(Dictionary<string, string> values, int fallback, params string[] keys)
+    {
+        var value = Read(values, keys);
+        return int.TryParse(value, out var parsed) && parsed > 0 ? parsed : fallback;
+    }
+
+    private static int? ReadOptionalInt(Dictionary<string, string> values, params string[] keys)
+    {
+        var value = Read(values, keys);
+        return int.TryParse(value, out var parsed) && parsed > 0 ? parsed : null;
+    }
+
+    private static bool ReadBool(Dictionary<string, string> values, bool fallback, params string[] keys)
+    {
+        var value = Read(values, keys);
+        return bool.TryParse(value, out var parsed) ? parsed : fallback;
+    }
+
+    private static Uri ReadUri(Dictionary<string, string> values, string key, string envKey, string fallback)
+    {
+        var value = Read(values, key, envKey) ?? fallback;
+
+        if (!Uri.TryCreate(value, UriKind.Absolute, out var uri))
+        {
+            throw new ArgumentException($"'{value}' is not an absolute URI.");
+        }
+
+        return uri;
+    }
+
+    private static string NormalizePath(string path) =>
+        path.StartsWith('/') ? path : $"/{path}";
+
+    private static string? NormalizeDirectoryPath(string? path)
+    {
+        if (string.IsNullOrWhiteSpace(path))
+        {
+            return null;
+        }
+
+        return Path.GetFullPath(path);
+    }
+}

src/Ngino.Client/FileLogger.cs

@@ -0,0 +1,113 @@
+using System.Text;
+using Microsoft.Extensions.Logging;
+
+namespace Ngino.Client;
+
+internal sealed class FileLoggerProvider : ILoggerProvider
+{
+    private const long DefaultMaxFileSizeBytes = 5L * 1024 * 1024;
+    private const string LogFileName = "ngino-client.log";
+    private const string RotatedLogFileName = "ngino-client.log.1";
+
+    private readonly string _directory;
+    private readonly long _maxFileSizeBytes;
+    private readonly object _lock = new();
+    private StreamWriter _writer = null!;
+    private string _currentFile = null!;
+
+    public FileLoggerProvider(string directory, long maxFileSizeBytes = DefaultMaxFileSizeBytes)
+    {
+        _directory = directory;
+        _maxFileSizeBytes = maxFileSizeBytes;
+        Directory.CreateDirectory(directory);
+        OpenFile();
+    }
+
+    public string LogDirectory => _directory;
+
+    public ILogger CreateLogger(string categoryName) => new FileLogger(this, categoryName);
+
+    public void WriteLog(DateTime timestamp, LogLevel level, string category, string message)
+    {
+        lock (_lock)
+        {
+            var line = $"{timestamp:yyyy-MM-dd HH:mm:ss.fff} [{level}] {category}: {message}";
+            if (_writer.BaseStream.Length + line.Length + 2 > _maxFileSizeBytes)
+            {
+                RotateFile();
+            }
+
+            _writer.WriteLine(line);
+        }
+    }
+
+    public void Dispose()
+    {
+        lock (_lock)
+        {
+            _writer.Dispose();
+        }
+    }
+
+    private void OpenFile()
+    {
+        _currentFile = Path.Combine(_directory, LogFileName);
+        _writer = new StreamWriter(
+            new FileStream(_currentFile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite),
+            new UTF8Encoding(encoderShouldEmitUTF8Identifier: false))
+        {
+            AutoFlush = true
+        };
+    }
+
+    private void RotateFile()
+    {
+        _writer.Dispose();
+
+        var rotatedFile = Path.Combine(_directory, RotatedLogFileName);
+        try
+        {
+            File.Delete(rotatedFile);
+            if (File.Exists(_currentFile))
+            {
+                File.Move(_currentFile, rotatedFile);
+            }
+        }
+        catch (IOException)
+        {
+        }
+        catch (UnauthorizedAccessException)
+        {
+        }
+
+        OpenFile();
+    }
+}
+
+internal sealed class FileLogger(FileLoggerProvider provider, string category) : ILogger
+{
+    public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
+
+    public bool IsEnabled(LogLevel logLevel) => logLevel >= LogLevel.Trace;
+
+    public void Log<TState>(
+        LogLevel logLevel,
+        EventId eventId,
+        TState state,
+        Exception? exception,
+        Func<TState, Exception?, string> formatter)
+    {
+        if (!IsEnabled(logLevel))
+        {
+            return;
+        }
+
+        var message = formatter(state, exception);
+        if (exception is not null)
+        {
+            message += Environment.NewLine + exception;
+        }
+
+        provider.WriteLog(DateTime.Now, logLevel, category, message);
+    }
+}

src/Ngino.Client/LlamaCppManager.cs

@@ -0,0 +1,856 @@
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Net.Http;
+using System.Net.Sockets;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace Ngino.Client;
+
+internal sealed partial class LlamaCppManager : IAsyncDisposable
+{
+    private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
+    private const int DefaultBasePort = 8081;
+    private const string NginoContainerLabel = "ngino-llamacpp";
+    private static readonly TimeSpan DockerTimeout = TimeSpan.FromSeconds(60);
+    private static readonly TimeSpan ContainerStartTimeout = TimeSpan.FromMinutes(5);
+    private static readonly TimeSpan DefaultFallbackCooldown = TimeSpan.FromMinutes(3);
+
+    private readonly string _blobsPath;
+    private readonly string _manifestsPath;
+    private readonly string _dockerImage;
+    private readonly int _basePort;
+    private readonly int? _parallel;
+    private readonly TimeSpan _fallbackCooldown;
+    private readonly ILogger _logger;
+    private readonly ConcurrentDictionary<string, int> _modelPorts = new(StringComparer.OrdinalIgnoreCase);
+    private readonly ConcurrentDictionary<int, byte> _reservedPorts = new();
+    private readonly ConcurrentDictionary<string, DateTime> _fallbackModels = new(StringComparer.OrdinalIgnoreCase);
+    private readonly ConcurrentDictionary<string, SemaphoreSlim> _modelStartLocks = new(StringComparer.OrdinalIgnoreCase);
+    private readonly object _portAllocationLock = new();
+
+    public LlamaCppManager(
+        string ollamaModelsPath,
+        string? dockerImage,
+        int? basePort,
+        ILogger? logger = null,
+        TimeSpan fallbackCooldown = default,
+        int? parallel = null)
+    {
+        _manifestsPath = Path.Combine(ollamaModelsPath, "manifests");
+        _blobsPath = Path.Combine(ollamaModelsPath, "blobs");
+        _dockerImage = dockerImage ?? GetDefaultDockerImage();
+        _basePort = basePort ?? DefaultBasePort;
+        _fallbackCooldown = fallbackCooldown > TimeSpan.Zero ? fallbackCooldown : DefaultFallbackCooldown;
+        _parallel = parallel is > 0 ? parallel : null;
+        _logger = logger ?? NullLogger<LlamaCppManager>.Instance;
+    }
+
+    public string DockerImage => _dockerImage;
+
+    public List<LlamaCppModel> DiscoverModels()
+    {
+        var models = new List<LlamaCppModel>();
+
+        if (!Directory.Exists(_manifestsPath))
+        {
+            _logger.LogWarning("Ollama manifests path not found: {ManifestsPath}", _manifestsPath);
+            return models;
+        }
+
+        foreach (var manifestPath in Directory.EnumerateFiles(_manifestsPath, "*", SearchOption.AllDirectories))
+        {
+            try
+            {
+                var model = ParseManifest(manifestPath);
+                if (model is not null)
+                {
+                    models.Add(model);
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogDebug(ex, "Failed to parse manifest: {ManifestPath}", manifestPath);
+            }
+        }
+
+        return models;
+    }
+
+    public List<LlamaCppModel> DiscoverModelsWithBlob()
+    {
+        return DiscoverModels().Where(m => File.Exists(m.BlobPath)).ToList();
+    }
+
+    public bool IsModelActive(string ollamaModelName)
+    {
+        return _modelPorts.ContainsKey(ollamaModelName);
+    }
+
+    public void MarkModelAsFallback(string ollamaModelName)
+    {
+        _fallbackModels[ollamaModelName] = DateTime.UtcNow.Add(_fallbackCooldown);
+        _logger.LogWarning(
+            "Model {Model} will fall back to the Ollama upstream for {Cooldown} before llama.cpp is retried.",
+            ollamaModelName, _fallbackCooldown);
+    }
+
+    public void MarkModelAsPermanentFallback(string ollamaModelName)
+    {
+        _fallbackModels[ollamaModelName] = DateTime.MaxValue;
+        _logger.LogError(
+            "Model {Model} exited its llama.cpp container before becoming ready. It will fall back to the Ollama upstream until it is unloaded.",
+            ollamaModelName);
+    }
+
+    public bool IsModelOnFallback(string ollamaModelName)
+    {
+        if (_fallbackModels.TryGetValue(ollamaModelName, out var expiresAt))
+        {
+            if (expiresAt > DateTime.UtcNow)
+            {
+                return true;
+            }
+
+            _fallbackModels.TryRemove(ollamaModelName, out _);
+        }
+
+        return false;
+    }
+
+    public void ClearModelFallback(string ollamaModelName)
+    {
+        if (_fallbackModels.TryRemove(ollamaModelName, out _))
+        {
+            _logger.LogInformation("Cleared llama.cpp fallback marker for model {Model}.", ollamaModelName);
+        }
+    }
+
+    public async Task<bool> IsContainerRunningAsync(string ollamaModelName)
+    {
+        if (!_modelPorts.ContainsKey(ollamaModelName))
+        {
+            return false;
+        }
+
+        var containerName = SanitizeContainerName($"ngino-llamacpp-{ollamaModelName}");
+        var (exitCode, output) = await RunDockerWithOutputAsync(
+            ["ps", "--filter", $"name=^{containerName}$", "--format", "{{.ID}}"],
+            CancellationToken.None);
+
+        var running = exitCode == 0 && !string.IsNullOrWhiteSpace(output);
+        if (!running)
+        {
+            _logger.LogWarning(
+                "llama.cpp container {ContainerName} is no longer running. Invalidating cached port for {Model}.",
+                containerName, ollamaModelName);
+            RemoveModelPort(ollamaModelName);
+        }
+
+        return running;
+    }
+
+    public bool RemoveModelMapping(string ollamaModelName)
+    {
+        if (RemoveModelPort(ollamaModelName))
+        {
+            _logger.LogWarning(
+                "Removed stale llama.cpp port mapping for {Model}.",
+                ollamaModelName);
+            return true;
+        }
+
+        return false;
+    }
+
+    public Uri? GetUpstream(string ollamaModelName)
+    {
+        if (_modelPorts.TryGetValue(ollamaModelName, out var port))
+        {
+            return new Uri($"http://localhost:{port}");
+        }
+
+        return null;
+    }
+
+    public async Task<bool> StartModelContainerAsync(LlamaCppModel model, CancellationToken cancellationToken)
+    {
+        var ollamaName = model.OllamaName;
+        if (string.IsNullOrWhiteSpace(ollamaName))
+        {
+            _logger.LogWarning("Cannot start container: model has no Ollama name");
+            return false;
+        }
+
+        var startLock = _modelStartLocks.GetOrAdd(ollamaName, static _ => new SemaphoreSlim(1, 1));
+        await startLock.WaitAsync(cancellationToken);
+        try
+        {
+            return await StartModelContainerCoreAsync(model, cancellationToken);
+        }
+        finally
+        {
+            startLock.Release();
+        }
+    }
+
+    private async Task<bool> StartModelContainerCoreAsync(LlamaCppModel model, CancellationToken cancellationToken)
+    {
+        var ollamaName = model.OllamaName;
+        if (string.IsNullOrWhiteSpace(ollamaName))
+        {
+            return false;
+        }
+
+        if (_modelPorts.ContainsKey(ollamaName))
+        {
+            _logger.LogInformation("Model {Model} already has a running container", ollamaName);
+            return true;
+        }
+
+        if (IsModelOnFallback(ollamaName))
+        {
+            _logger.LogInformation(
+                "Model {Model} previously failed to load via llama.cpp. Skipping container start.",
+                ollamaName);
+            return false;
+        }
+
+        if (!File.Exists(model.BlobPath))
+        {
+            _logger.LogError("Model blob not found: {BlobPath}", model.BlobPath);
+            MarkModelAsFallback(ollamaName);
+            return false;
+        }
+
+        var port = FindAvailablePort();
+        var containerName = SanitizeContainerName($"ngino-llamacpp-{ollamaName}");
+
+        try
+        {
+            var existingPort = await FindExistingContainerPortAsync(containerName);
+            if (existingPort.HasValue)
+            {
+                _logger.LogInformation(
+                    "Reusing existing container for {Model} on port {Port}", ollamaName, existingPort.Value);
+                _modelPorts[ollamaName] = existingPort.Value;
+                return true;
+            }
+
+            await RunDockerAsync(["rm", "-f", containerName], CancellationToken.None);
+
+            var args = BuildDockerRunArgs(containerName, model, port);
+            _logger.LogInformation(
+                "Starting llama.cpp container for {Model} on port {Port}: docker {Args}",
+                ollamaName, port, string.Join(" ", args));
+
+            var (exitCode, output) = await RunDockerWithOutputAsync(args, cancellationToken);
+            if (exitCode != 0)
+            {
+                _logger.LogError(
+                    "Failed to start llama.cpp container for {Model}, exit code: {ExitCode}, output: {Output}",
+                    ollamaName, exitCode, output);
+                MarkModelAsFallback(ollamaName);
+                return false;
+            }
+
+            _logger.LogInformation(
+                "llama.cpp container for {Model} started on port {Port}. Waiting for it to become ready...",
+                ollamaName, port);
+
+            var result = await WaitForServerReadyAsync("localhost", port, containerName, cancellationToken);
+            if (result != ContainerStartResult.Ready)
+            {
+                if (result == ContainerStartResult.ContainerExited)
+                {
+                    MarkModelAsPermanentFallback(ollamaName);
+                }
+                else
+                {
+                    MarkModelAsFallback(ollamaName);
+                }
+
+                _logger.LogError(
+                    "llama.cpp container for {Model} did not become ready on port {Port} within {Timeout} ({Result}). Stopping it.",
+                    ollamaName, port, ContainerStartTimeout, result);
+
+                try
+                {
+                    await RunDockerAsync(["stop", "--time", "10", containerName], CancellationToken.None);
+                    await RunDockerAsync(["rm", "-f", containerName], CancellationToken.None);
+                }
+                catch (Exception cleanupException)
+                {
+                    _logger.LogWarning(cleanupException, "Failed to clean up container {ContainerName}", containerName);
+                }
+
+                return false;
+            }
+
+            _modelPorts[ollamaName] = port;
+            _logger.LogInformation("llama.cpp container for {Model} is ready on port {Port}.", ollamaName, port);
+            return true;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to start llama.cpp container for {Model}", ollamaName);
+            MarkModelAsFallback(ollamaName);
+            return false;
+        }
+        finally
+        {
+            ReleaseReservedPort(port);
+        }
+    }
+
+    public async Task<bool> StopModelContainerAsync(string ollamaModelName, CancellationToken cancellationToken)
+    {
+        if (!RemoveModelPort(ollamaModelName))
+        {
+            _logger.LogWarning("No running container found for model {Model}", ollamaModelName);
+            return false;
+        }
+
+        var containerName = SanitizeContainerName($"ngino-llamacpp-{ollamaModelName}");
+
+        _logger.LogInformation("Stopping llama.cpp container {ContainerName}", containerName);
+
+        try
+        {
+            await RunDockerAsync(["stop", "--time", "10", containerName], cancellationToken);
+            await RunDockerAsync(["rm", "-f", containerName], cancellationToken);
+            ClearModelFallback(ollamaModelName);
+            return true;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to stop container {ContainerName}", containerName);
+            return false;
+        }
+    }
+
+    public async Task StopAllContainersAsync()
+    {
+        _logger.LogInformation("Stopping all llama.cpp containers...");
+
+        try
+        {
+            var (exitCode, output) = await RunDockerWithOutputAsync(
+                ["ps", "-q", "--filter", $"label={NginoContainerLabel}"],
+                CancellationToken.None);
+
+            if (exitCode == 0 && !string.IsNullOrWhiteSpace(output))
+            {
+                var containerIds = output.Split('\n', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+                foreach (var id in containerIds)
+                {
+                    await RunDockerAsync(["stop", "--time", "10", id], CancellationToken.None);
+                    await RunDockerAsync(["rm", "-f", id], CancellationToken.None);
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to stop all llama.cpp containers");
+        }
+
+        _modelPorts.Clear();
+        _reservedPorts.Clear();
+        _fallbackModels.Clear();
+    }
+
+    public async Task<bool> TestDockerAsync()
+    {
+        try
+        {
+            var (exitCode, _) = await RunDockerWithOutputAsync(["info", "--format", "{{.ServerVersion}}"], CancellationToken.None);
+            return exitCode == 0;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    public async ValueTask DisposeAsync()
+    {
+        await StopAllContainersAsync();
+    }
+
+    private LlamaCppModel? ParseManifest(string manifestPath)
+    {
+        var json = File.ReadAllText(manifestPath);
+        using var document = JsonDocument.Parse(json);
+        var root = document.RootElement;
+
+        if (!root.TryGetProperty("layers", out var layers) || layers.ValueKind != JsonValueKind.Array)
+        {
+            return null;
+        }
+
+        string? modelDigest = null;
+        foreach (var layer in layers.EnumerateArray())
+        {
+            if (layer.TryGetProperty("mediaType", out var mediaType)
+                && mediaType.GetString() == "application/vnd.ollama.image.model"
+                && layer.TryGetProperty("digest", out var digest))
+            {
+                modelDigest = digest.GetString();
+                break;
+            }
+        }
+
+        if (string.IsNullOrWhiteSpace(modelDigest))
+        {
+            return null;
+        }
+
+        var modelName = ResolveModelName(manifestPath);
+        if (modelName is null)
+        {
+            return null;
+        }
+
+        var blobName = modelDigest.Replace(":", "-", StringComparison.Ordinal);
+        var blobPath = Path.GetFullPath(Path.Combine(_blobsPath, blobName));
+
+        return new LlamaCppModel
+        {
+            OllamaName = modelName,
+            BlobDigest = blobName,
+            BlobPath = blobPath,
+            ManifestPath = manifestPath
+        };
+    }
+
+    private static string? ResolveModelName(string manifestPath)
+    {
+        var normalizedPath = manifestPath.Replace('\\', '/');
+        var parts = normalizedPath.Split('/', StringSplitOptions.RemoveEmptyEntries);
+
+        var manifestIndex = Array.FindLastIndex(parts, p =>
+            p.Equals("manifests", StringComparison.OrdinalIgnoreCase));
+
+        if (manifestIndex < 0 || manifestIndex >= parts.Length - 1)
+        {
+            return null;
+        }
+
+        var relativeParts = parts[(manifestIndex + 1)..];
+
+        if (relativeParts.Length < 2)
+        {
+            return null;
+        }
+
+        var registry = relativeParts[0];
+
+        if (registry.Equals("registry.ollama.ai", StringComparison.OrdinalIgnoreCase))
+        {
+            if (relativeParts.Length < 3)
+            {
+                return null;
+            }
+
+            if (relativeParts[1].Equals("library", StringComparison.OrdinalIgnoreCase) && relativeParts.Length >= 4)
+            {
+                return $"{relativeParts[2]}:{relativeParts[3]}";
+            }
+
+            if (relativeParts.Length == 3)
+            {
+                return $"{relativeParts[1]}:{relativeParts[2]}";
+            }
+
+            return null;
+        }
+
+        if (relativeParts.Length >= 3)
+        {
+            var tag = relativeParts[^1];
+            var modelPath = string.Join("/", relativeParts.Take(relativeParts.Length - 1));
+            return $"{modelPath}:{tag}";
+        }
+
+        return null;
+    }
+
+    private string[] BuildDockerRunArgs(string containerName, LlamaCppModel model, int port)
+    {
+        var blobsDir = Path.GetDirectoryName(Path.GetFullPath(model.BlobPath))!;
+        var blobFile = Path.GetFileName(model.BlobPath);
+
+        var args = new List<string>
+        {
+            "run",
+            "-d",
+            "--label", $"{NginoContainerLabel}=true",
+            "--name", containerName,
+            "-p", $"{port}:{port}",
+            "-v", $"{blobsDir}:/models/blobs:ro",
+        };
+
+        if (HasRocmDevices())
+        {
+            args.Add("--device=/dev/kfd");
+            args.Add("--device=/dev/dri");
+            args.Add("--group-add=video");
+        }
+
+        if (HasNvidiaGpu() && !HasRocmDevices())
+        {
+            args.Add("--gpus=all");
+        }
+
+        args.Add(_dockerImage);
+        args.Add("--embeddings");
+        args.Add("-m");
+        args.Add($"/models/blobs/{blobFile}");
+        args.Add("-ngl");
+        args.Add("auto");
+        if (_parallel.HasValue)
+        {
+            args.Add("--parallel");
+            args.Add(_parallel.Value.ToString());
+        }
+        args.Add("--host");
+        args.Add("0.0.0.0");
+        args.Add("--port");
+        args.Add(port.ToString());
+
+        return [.. args];
+    }
+
+    private async Task<int?> FindExistingContainerPortAsync(string containerName)
+    {
+        var (exitCode, output) = await RunDockerWithOutputAsync(
+            ["ps", "--filter", $"name=^{containerName}$", "--format", "{{.Ports}}"],
+            CancellationToken.None);
+
+        if (exitCode != 0 || string.IsNullOrWhiteSpace(output))
+        {
+            return null;
+        }
+
+        foreach (var line in output.Split('\n', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+        {
+            var port = ParseHostPort(line);
+            if (port.HasValue)
+            {
+                return port;
+            }
+        }
+
+        return null;
+    }
+
+    private static int? ParseHostPort(string ports)
+    {
+        foreach (var mapping in ports.Split(','))
+        {
+            var trimmed = mapping.Trim();
+            var arrowIndex = trimmed.IndexOf("->", StringComparison.Ordinal);
+            if (arrowIndex < 0)
+            {
+                continue;
+            }
+
+            var hostPart = trimmed[..arrowIndex].Trim();
+            var colonIndex = hostPart.LastIndexOf(':');
+            if (colonIndex < 0)
+            {
+                continue;
+            }
+
+            if (int.TryParse(hostPart[(colonIndex + 1)..], out var port))
+            {
+                return port;
+            }
+        }
+
+        return null;
+    }
+
+    private int FindAvailablePort()
+    {
+        lock (_portAllocationLock)
+        {
+            var usedPorts = new HashSet<int>(_modelPorts.Values);
+            foreach (var reservedPort in _reservedPorts.Keys)
+            {
+                usedPorts.Add(reservedPort);
+            }
+
+            var port = _basePort;
+
+            while (usedPorts.Contains(port))
+            {
+                port++;
+            }
+
+            _reservedPorts[port] = 0;
+            return port;
+        }
+    }
+
+    private void ReleaseReservedPort(int port)
+    {
+        _reservedPorts.TryRemove(port, out _);
+    }
+
+    private bool RemoveModelPort(string ollamaModelName)
+    {
+        if (_modelPorts.TryRemove(ollamaModelName, out var port))
+        {
+            ReleaseReservedPort(port);
+            return true;
+        }
+
+        return false;
+    }
+
+    private async Task<ContainerStartResult> WaitForServerReadyAsync(
+        string host, int port, string containerName, CancellationToken cancellationToken)
+    {
+        var deadline = DateTime.UtcNow + ContainerStartTimeout;
+
+        var tcpResult = await WaitForTcpPortAsync(host, port, containerName, deadline, cancellationToken);
+        if (tcpResult != ContainerStartResult.Ready)
+        {
+            return tcpResult;
+        }
+
+        using var handler = new SocketsHttpHandler
+        {
+            ConnectTimeout = TimeSpan.FromSeconds(3),
+            UseProxy = false
+        };
+        using var httpClient = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(10) };
+
+        while (DateTime.UtcNow < deadline)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (!await IsDockerContainerRunningAsync(containerName))
+            {
+                await LogContainerOutputAsync(containerName);
+                return ContainerStartResult.ContainerExited;
+            }
+
+            try
+            {
+                using var response = await httpClient.GetAsync(
+                    $"http://{host}:{port}/health", cancellationToken);
+                if (response.IsSuccessStatusCode)
+                {
+                    return ContainerStartResult.Ready;
+                }
+            }
+            catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
+            {
+            }
+            catch (HttpRequestException ex)
+            {
+                _logger.LogDebug(ex, "Health probe of llama.cpp container {ContainerName} failed; retrying.", containerName);
+            }
+            catch (IOException ex)
+            {
+                _logger.LogDebug(ex, "Health probe of llama.cpp container {ContainerName} failed; retrying.", containerName);
+            }
+
+            await Task.Delay(TimeSpan.FromSeconds(2), cancellationToken);
+        }
+
+        return ContainerStartResult.TimedOut;
+    }
+
+    private async Task<ContainerStartResult> WaitForTcpPortAsync(
+        string host, int port, string containerName, DateTime deadline, CancellationToken cancellationToken)
+    {
+        while (DateTime.UtcNow < deadline)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (!await IsDockerContainerRunningAsync(containerName))
+            {
+                await LogContainerOutputAsync(containerName);
+                return ContainerStartResult.ContainerExited;
+            }
+
+            try
+            {
+                using var client = new TcpClient();
+                await client.ConnectAsync(host, port, cancellationToken);
+                return ContainerStartResult.Ready;
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (SocketException)
+            {
+            }
+
+            await Task.Delay(TimeSpan.FromSeconds(2), cancellationToken);
+        }
+
+        return ContainerStartResult.TimedOut;
+    }
+
+    private async Task<bool> IsDockerContainerRunningAsync(string containerName)
+    {
+        try
+        {
+            var (exitCode, output) = await RunDockerWithOutputAsync(
+                ["inspect", "-f", "{{.State.Running}}", containerName],
+                CancellationToken.None);
+            return exitCode == 0 && string.Equals(output.Trim(), "true", StringComparison.OrdinalIgnoreCase);
+        }
+        catch
+        {
+            return true;
+        }
+    }
+
+    private async Task LogContainerOutputAsync(string containerName)
+    {
+        try
+        {
+            var (_, output) = await RunDockerWithOutputAsync(
+                ["logs", "--tail", "100", containerName],
+                CancellationToken.None);
+
+            if (!string.IsNullOrWhiteSpace(output))
+            {
+                _logger.LogError(
+                    "llama.cpp container {ContainerName} exited before becoming ready. Last output:\n{Output}",
+                    containerName, output);
+            }
+            else
+            {
+                _logger.LogError(
+                    "llama.cpp container {ContainerName} exited before becoming ready, but produced no output.",
+                    containerName);
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to read logs of container {ContainerName}", containerName);
+        }
+    }
+
+    private static string SanitizeContainerName(string name)
+    {
+        var sanitized = InvalidContainerNameChars().Replace(name, "_");
+        return sanitized.Trim('_').ToLowerInvariant();
+    }
+
+    private async Task<int> RunDockerAsync(string[] args, CancellationToken cancellationToken)
+    {
+        var (exitCode, _) = await RunDockerWithOutputAsync(args, cancellationToken);
+        return exitCode;
+    }
+
+    private async Task<(int ExitCode, string Output)> RunDockerWithOutputAsync(
+        string[] args, CancellationToken cancellationToken)
+    {
+        var process = new Process
+        {
+            StartInfo = new ProcessStartInfo
+            {
+                FileName = "docker",
+                Arguments = string.Join(" ", args.Select(a => a.Contains(' ') ? $"\"{a}\"" : a)),
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false,
+                CreateNoWindow = true
+            }
+        };
+
+        process.Start();
+
+        var readOutput = process.StandardOutput.ReadToEndAsync(cancellationToken);
+        var readError = process.StandardError.ReadToEndAsync(cancellationToken);
+        var waitTask = process.WaitForExitAsync(cancellationToken);
+
+        var completed = await Task.WhenAny(waitTask, Task.Delay(DockerTimeout, cancellationToken));
+
+        string output;
+        string error;
+
+        try
+        {
+            output = await readOutput;
+            error = await readError;
+        }
+        catch
+        {
+            output = "";
+            error = "timed out";
+        }
+
+        if (completed != waitTask)
+        {
+            _logger.LogWarning("Docker command timed out: docker {Args}", string.Join(" ", args));
+            try { process.Kill(entireProcessTree: true); } catch { }
+            return (-1, error);
+        }
+
+        if (!string.IsNullOrWhiteSpace(error))
+        {
+            output = $"{output}\n{error}".Trim();
+        }
+
+        return (process.ExitCode, output);
+    }
+
+    private static string GetDefaultDockerImage()
+    {
+        if (HasRocmDevices())
+        {
+            return "ghcr.io/ggml-org/llama.cpp:server-rocm";
+        }
+
+        if (HasNvidiaGpu())
+        {
+            return "ghcr.io/ggml-org/llama.cpp:server-cuda";
+        }
+
+        return "ghcr.io/ggml-org/llama.cpp:server";
+    }
+
+    private static bool HasRocmDevices() => File.Exists("/dev/kfd") && Directory.Exists("/dev/dri");
+
+    private static bool HasNvidiaGpu()
+    {
+        try
+        {
+            return File.Exists("/proc/driver/nvidia/version")
+                || Directory.Exists("/proc/driver/nvidia/gpus");
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    [GeneratedRegex(@"[^a-zA-Z0-9_.-]")]
+    private static partial Regex InvalidContainerNameChars();
+
+    private enum ContainerStartResult
+    {
+        Ready,
+        ContainerExited,
+        TimedOut
+    }
+}
+
+internal sealed record LlamaCppModel
+{
+    public required string OllamaName { get; init; }
+    public required string BlobDigest { get; init; }
+    public required string BlobPath { get; init; }
+    public required string ManifestPath { get; init; }
+}

src/Ngino.Client/Ngino.Client.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <ItemGroup>
-    <ProjectReference Include="..\ReverseLlama.Protocol\ReverseLlama.Protocol.csproj" />
+    <ProjectReference Include="..\Ngino.Protocol\Ngino.Protocol.csproj" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="10.0.10" />
   </ItemGroup>
 
   <PropertyGroup>

src/Ngino.Client/OllamaToLlamaCppTranslator.cs

@@ -0,0 +1,605 @@
+using System.Text;
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+using Ngino.Protocol;
+
+namespace Ngino.Client;
+
+internal sealed class OllamaToLlamaCppTranslator
+{
+    private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
+
+    private readonly string _modelName;
+    private readonly ILogger _logger;
+
+    public OllamaToLlamaCppTranslator(string modelName, ILogger logger)
+    {
+        _modelName = modelName;
+        _logger = logger;
+    }
+
+    public bool TryTranslatePath(string method, string pathAndQuery, out string newPath)
+    {
+        var path = pathAndQuery.Split('?')[0];
+        newPath = path switch
+        {
+            "/api/generate" => "/completion",
+            "/api/chat" => "/v1/chat/completions",
+            "/api/embed" or "/api/embeddings" => "/v1/embeddings",
+            _ => null!
+        };
+        return newPath is not null;
+    }
+
+    public byte[] TranslateBody(string pathAndQuery, byte[] body)
+    {
+        if (body is null || body.Length == 0)
+            return body;
+
+        var path = pathAndQuery.Split('?')[0];
+
+        try
+        {
+            return path switch
+            {
+                "/api/generate" => TranslateGenerateBody(body),
+                "/api/chat" => TranslateChatBody(body),
+                "/api/embed" or "/api/embeddings" => TranslateEmbedBody(body),
+                _ => body
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to translate request body for {Path}", path);
+            return body;
+        }
+    }
+
+    private byte[] TranslateGenerateBody(byte[] body)
+    {
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var result = new Dictionary<string, object?>();
+
+        if (root.TryGetProperty("prompt", out var prompt))
+            result["prompt"] = prompt.GetString() ?? "";
+
+        result["stream"] = true;
+
+        CopyOptions(root, result);
+
+        if (!result.ContainsKey("n_predict"))
+            result["n_predict"] = 2048;
+
+        return JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+    }
+
+    private byte[] TranslateChatBody(byte[] body)
+    {
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var result = new Dictionary<string, object?>();
+
+        if (root.TryGetProperty("messages", out var messages))
+            result["messages"] = messages.Deserialize<object>(JsonOptions);
+
+        result["stream"] = true;
+
+        if (root.TryGetProperty("model", out var model))
+            result["model"] = model.GetString();
+
+        CopyOptions(root, result, chat: true);
+
+        if (!result.ContainsKey("max_tokens"))
+            result["max_tokens"] = 2048;
+
+        return JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+    }
+
+    public static bool ExtractOriginalStream(byte[] originalBody, string pathAndQuery)
+    {
+        var path = pathAndQuery.Split('?')[0];
+        if (path is not "/api/generate" and not "/api/chat")
+            return true;
+
+        try
+        {
+            using var doc = JsonDocument.Parse(originalBody);
+            var root = doc.RootElement;
+            if (root.TryGetProperty("stream", out var stream))
+                return stream.ValueKind != JsonValueKind.False;
+        }
+        catch
+        {
+        }
+
+        return true;
+    }
+
+    private byte[] TranslateEmbedBody(byte[] body)
+    {
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var result = new Dictionary<string, object?>
+        {
+            ["model"] = _modelName
+        };
+
+        if (root.TryGetProperty("input", out var input))
+            result["input"] = input.Deserialize<object>(JsonOptions);
+
+        return JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+    }
+
+    public Func<HttpResponseMessage, CancellationToken, Task> CreateResponseHandler(
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        string originalPath,
+        Func<bool> originalRequestedStream) =>
+        async (response, ct) =>
+        {
+            await TranslateAndSendResponse(response, sendAsync, requestId, originalPath, originalRequestedStream(), ct);
+        };
+
+    private async Task TranslateAndSendResponse(
+        HttpResponseMessage httpResponse,
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        string originalPath,
+        bool originalRequestedStream,
+        CancellationToken cancellationToken)
+    {
+        var path = originalPath.Split('?')[0];
+
+        switch (path)
+        {
+            case "/api/tags":
+                await SynthesizeTagsResponse(sendAsync, requestId, cancellationToken);
+                return;
+
+            case "/api/ps":
+                await SynthesizePsResponse(sendAsync, requestId, cancellationToken);
+                return;
+        }
+
+        if (!httpResponse.IsSuccessStatusCode)
+        {
+            await ForwardRawResponse(httpResponse, sendAsync, requestId, cancellationToken);
+            return;
+        }
+
+        if (path is "/api/generate" or "/api/chat")
+        {
+            if (originalRequestedStream)
+            {
+                await TranslateStreaming(path, httpResponse, sendAsync, requestId, cancellationToken);
+            }
+            else
+            {
+                await TranslateNonStreaming(path, httpResponse, sendAsync, requestId, cancellationToken);
+            }
+        }
+        else
+        {
+            await ForwardRawResponse(httpResponse, sendAsync, requestId, cancellationToken);
+        }
+    }
+
+    private async Task ForwardRawResponse(
+        HttpResponseMessage httpResponse,
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        CancellationToken cancellationToken)
+    {
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseHeaders,
+            RequestId = requestId,
+            StatusCode = (int)httpResponse.StatusCode,
+            ReasonPhrase = httpResponse.ReasonPhrase
+        }, cancellationToken);
+
+        await using var stream = await httpResponse.Content.ReadAsStreamAsync(cancellationToken);
+        var buffer = new byte[64 * 1024];
+        while (true)
+        {
+            var bytesRead = await stream.ReadAsync(buffer, cancellationToken);
+            if (bytesRead == 0)
+                break;
+            await sendAsync(new TunnelMessage
+            {
+                Type = TunnelMessageTypes.HttpResponseBody,
+                RequestId = requestId,
+                Body = buffer.AsSpan(0, bytesRead).ToArray()
+            }, cancellationToken);
+        }
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseComplete,
+            RequestId = requestId
+        }, cancellationToken);
+    }
+
+    private async Task SynthesizeTagsResponse(
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        CancellationToken cancellationToken)
+    {
+        var modelList = new
+        {
+            models = new[]
+            {
+                new
+                {
+                    name = _modelName,
+                    model = _modelName,
+                    modified_at = DateTime.UtcNow.ToString("o"),
+                    size = 0L,
+                    digest = "sha256:" + _modelName,
+                    details = new
+                    {
+                        format = "gguf",
+                        family = "llama",
+                        parameter_size = "",
+                        quantization_level = ""
+                    }
+                }
+            }
+        };
+
+        var body = JsonSerializer.SerializeToUtf8Bytes(modelList, JsonOptions);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseHeaders,
+            RequestId = requestId,
+            StatusCode = 200,
+            ReasonPhrase = "OK"
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseBody,
+            RequestId = requestId,
+            Body = body
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseComplete,
+            RequestId = requestId
+        }, cancellationToken);
+    }
+
+    private async Task SynthesizePsResponse(
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        CancellationToken cancellationToken)
+    {
+        var body = JsonSerializer.SerializeToUtf8Bytes(new { models = Array.Empty<object>() }, JsonOptions);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseHeaders,
+            RequestId = requestId,
+            StatusCode = 200,
+            ReasonPhrase = "OK"
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseBody,
+            RequestId = requestId,
+            Body = body
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseComplete,
+            RequestId = requestId
+        }, cancellationToken);
+    }
+
+    private async Task TranslateNonStreaming(
+        string path,
+        HttpResponseMessage httpResponse,
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        CancellationToken cancellationToken)
+    {
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseHeaders,
+            RequestId = requestId,
+            StatusCode = (int)httpResponse.StatusCode,
+            ReasonPhrase = httpResponse.ReasonPhrase
+        }, cancellationToken);
+
+        var body = await httpResponse.Content.ReadAsByteArrayAsync(cancellationToken);
+        byte[] translatedBody;
+
+        try
+        {
+            translatedBody = path switch
+            {
+                "/api/generate" => TranslateNonStreamingGenerate(body),
+                "/api/chat" => TranslateNonStreamingChat(body),
+                _ => body
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to translate non-streaming response");
+            translatedBody = body;
+        }
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseBody,
+            RequestId = requestId,
+            Body = translatedBody
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseComplete,
+            RequestId = requestId
+        }, cancellationToken);
+    }
+
+    private async Task TranslateStreaming(
+        string path,
+        HttpResponseMessage httpResponse,
+        Func<TunnelMessage, CancellationToken, Task> sendAsync,
+        string requestId,
+        CancellationToken cancellationToken)
+    {
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseHeaders,
+            RequestId = requestId,
+            StatusCode = 200,
+            ReasonPhrase = "OK"
+        }, cancellationToken);
+
+        await using var stream = await httpResponse.Content.ReadAsStreamAsync(cancellationToken);
+        using var reader = new StreamReader(stream, Encoding.UTF8);
+
+        while (!cancellationToken.IsCancellationRequested)
+        {
+            var line = await reader.ReadLineAsync(cancellationToken);
+            if (line is null)
+                break;
+
+            if (!line.StartsWith("data: ", StringComparison.Ordinal))
+                continue;
+
+            var jsonStr = line[6..];
+            if (jsonStr == "[DONE]")
+                continue;
+
+            try
+            {
+                using var doc = JsonDocument.Parse(jsonStr);
+                var root = doc.RootElement;
+
+                byte[]? chunk = path switch
+                {
+                    "/api/generate" => TranslateGenerateStreamChunk(root),
+                    "/api/chat" => TranslateChatStreamChunk(root),
+                    _ => null
+                };
+
+                if (chunk is not null)
+                {
+                    await sendAsync(new TunnelMessage
+                    {
+                        Type = TunnelMessageTypes.HttpResponseBody,
+                        RequestId = requestId,
+                        Body = chunk
+                    }, cancellationToken);
+                }
+            }
+            catch (JsonException)
+            {
+            }
+        }
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseBody,
+            RequestId = requestId,
+            Body = Encoding.UTF8.GetBytes(
+                $"{{\"model\":\"{EscapeJson(_modelName)}\",\"response\":\"\",\"done\":true}}\n")
+        }, cancellationToken);
+
+        await sendAsync(new TunnelMessage
+        {
+            Type = TunnelMessageTypes.HttpResponseComplete,
+            RequestId = requestId
+        }, cancellationToken);
+    }
+
+    private byte[] TranslateNonStreamingGenerate(byte[] body)
+    {
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var result = new Dictionary<string, object?>
+        {
+            ["model"] = _modelName,
+            ["created_at"] = DateTime.UtcNow.ToString("o"),
+            ["response"] = root.TryGetProperty("content", out var content) ? content.GetString() : "",
+            ["done"] = root.TryGetProperty("stop", out var stop) && stop.GetBoolean()
+        };
+
+        CopyTimings(root, result);
+        return JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+    }
+
+    private byte[] TranslateNonStreamingChat(byte[] body)
+    {
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var message = root.GetProperty("choices")[0].GetProperty("message");
+        var content = message.GetProperty("content").GetString() ?? "";
+
+        var result = new Dictionary<string, object?>
+        {
+            ["model"] = _modelName,
+            ["created_at"] = DateTime.UtcNow.ToString("o"),
+            ["message"] = new Dictionary<string, object?>
+            {
+                ["role"] = "assistant",
+                ["content"] = content
+            },
+            ["done"] = true
+        };
+
+        if (root.TryGetProperty("usage", out var usage))
+        {
+            if (usage.TryGetProperty("completion_tokens", out var comp))
+                result["eval_count"] = comp.GetInt32();
+            if (usage.TryGetProperty("prompt_tokens", out var prompt))
+                result["prompt_eval_count"] = prompt.GetInt32();
+        }
+
+        CopyTimings(root, result);
+        return JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+    }
+
+    private byte[]? TranslateGenerateStreamChunk(JsonElement root)
+    {
+        var done = root.TryGetProperty("stop", out var stop) && stop.GetBoolean();
+        var text = root.TryGetProperty("content", out var content) ? content.GetString() ?? "" : "";
+
+        var result = new Dictionary<string, object?>
+        {
+            ["model"] = _modelName,
+            ["created_at"] = DateTime.UtcNow.ToString("o"),
+            ["response"] = text,
+            ["done"] = done
+        };
+
+        if (done)
+            CopyTimings(root, result);
+
+        var bytes = JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+        var withNewline = new byte[bytes.Length + 1];
+        bytes.CopyTo(withNewline, 0);
+        withNewline[^1] = (byte)'\n';
+        return withNewline;
+    }
+
+    private byte[]? TranslateChatStreamChunk(JsonElement root)
+    {
+        if (!root.TryGetProperty("choices", out var choices) || choices.GetArrayLength() == 0)
+            return null;
+
+        var choice = choices[0];
+        var delta = choice.GetProperty("delta");
+        var finishReason = choice.TryGetProperty("finish_reason", out var fr) ? fr.GetString() : null;
+        var done = finishReason is not null && finishReason != "null" && finishReason != "";
+
+        var content = delta.TryGetProperty("content", out var c) ? c.GetString() ?? "" : "";
+        var role = delta.TryGetProperty("role", out var r) ? r.GetString() : null;
+
+        var result = new Dictionary<string, object?>
+        {
+            ["model"] = _modelName,
+            ["created_at"] = DateTime.UtcNow.ToString("o"),
+            ["message"] = new Dictionary<string, object?>
+            {
+                ["role"] = role ?? "assistant",
+                ["content"] = content
+            },
+            ["done"] = done
+        };
+
+        var bytes = JsonSerializer.SerializeToUtf8Bytes(result, JsonOptions);
+        var withNewline = new byte[bytes.Length + 1];
+        bytes.CopyTo(withNewline, 0);
+        withNewline[^1] = (byte)'\n';
+        return withNewline;
+    }
+
+    private static void CopyOptions(JsonElement root, Dictionary<string, object?> target, bool chat = false)
+    {
+        if (!root.TryGetProperty("options", out var options) || options.ValueKind != JsonValueKind.Object)
+            return;
+
+        foreach (var opt in options.EnumerateObject())
+        {
+            var key = (chat ? MapChatOptionName(opt.Name) : MapGenerateOptionName(opt.Name)) ?? opt.Name;
+            target[key] = ValueToObject(opt.Value);
+        }
+    }
+
+    private static string? MapGenerateOptionName(string name) => name switch
+    {
+        "num_predict" => "n_predict",
+        "temperature" => "temperature",
+        "top_p" => "top_p",
+        "top_k" => "top_k",
+        "seed" => "seed",
+        "stop" => "stop",
+        "repeat_penalty" => "repeat_penalty",
+        "repeat_last_n" => "repeat_last_n",
+        "frequency_penalty" => "frequency_penalty",
+        "presence_penalty" => "presence_penalty",
+        "mirostat" => "mirostat",
+        "mirostat_tau" => "mirostat_tau",
+        "mirostat_eta" => "mirostat_eta",
+        "num_ctx" => "n_ctx",
+        "num_batch" => "n_batch",
+        _ => null
+    };
+
+    private static string? MapChatOptionName(string name) => name switch
+    {
+        "num_predict" => "max_tokens",
+        "temperature" => "temperature",
+        "top_p" => "top_p",
+        "seed" => "seed",
+        "stop" => "stop",
+        "frequency_penalty" => "frequency_penalty",
+        "presence_penalty" => "presence_penalty",
+        _ => null
+    };
+
+    private static void CopyTimings(JsonElement root, Dictionary<string, object?> target)
+    {
+        if (!root.TryGetProperty("timings", out var timings))
+            return;
+
+        if (timings.TryGetProperty("predicted_n", out var predN))
+            target["eval_count"] = predN.GetInt32();
+        if (timings.TryGetProperty("predicted_ms", out var predMs))
+            target["eval_duration"] = (long)(predMs.GetDouble() * 1_000_000);
+        if (timings.TryGetProperty("prompt_n", out var promptN))
+            target["prompt_eval_count"] = promptN.GetInt32();
+        if (timings.TryGetProperty("prompt_ms", out var promptMs))
+            target["prompt_eval_duration"] = (long)(promptMs.GetDouble() * 1_000_000);
+    }
+
+    private static object? ValueToObject(JsonElement element)
+    {
+        return element.ValueKind switch
+        {
+            JsonValueKind.String => element.GetString(),
+            JsonValueKind.Number => element.TryGetInt64(out var l) ? (object)l : element.GetDouble(),
+            JsonValueKind.True => true,
+            JsonValueKind.False => false,
+            JsonValueKind.Null => null,
+            _ => element.Deserialize<object>(JsonOptions)
+        };
+    }
+
+    private static string EscapeJson(string value) =>
+        value.Replace("\\", "\\\\").Replace("\"", "\\\"");
+}

src/Ngino.Client/Program.cs

@@ -1,25 +1,45 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
-using ReverseLlama.Client;
+using Ngino.Client;
 
 try
 {
     var options = ClientOptions.Parse(args);
 
-    Console.WriteLine("ReverseLlama client");
+    Console.WriteLine("Ngino client");
     Console.WriteLine($"  client id: {options.ClientId}");
     Console.WriteLine($"  server tunnel: {options.TunnelUri}");
     Console.WriteLine($"  local upstream: {options.Upstream}");
+    if (options.InsecureSkipTlsVerify)
+    {
+        Console.WriteLine("  WARNING: server TLS certificate validation is disabled");
+    }
+
+    if (options.UseLlamaCppViaDocker)
+    {
+        Console.WriteLine($"  llama.cpp via Docker: enabled");
+        Console.WriteLine($"  ollama models path: {options.UseOllamaModelsPath ?? "(not set)"}");
+        Console.WriteLine($"  llama.cpp docker image: {options.LlamaCppDockerImage ?? "(auto)"}");
+        Console.WriteLine($"  llama.cpp base port: {options.LlamaCppBasePort}");
+        Console.WriteLine(
+            options.LlamaCppParallel.HasValue
+                ? $"  llama.cpp parallel slots: {options.LlamaCppParallel.Value}"
+                : "  llama.cpp parallel slots: (llama.cpp default)");
+    }
+
+    var logDirectory = options.LogDirectory ?? Path.Combine(AppContext.BaseDirectory, "Logs");
+    Console.WriteLine($"  log directory: {logDirectory}");
 
     // Args are parsed by ClientOptions; keep them away from the host configuration.
     var builder = Host.CreateApplicationBuilder(new HostApplicationBuilderSettings { Args = [] });
     builder.Services.AddSingleton(options);
     builder.Services.AddSingleton<TunnelClient>();
     builder.Services.AddHostedService<TunnelWorker>();
-    builder.Services.AddWindowsService(service => service.ServiceName = "ReverseLlamaClient");
+    builder.Services.AddWindowsService(service => service.ServiceName = "NginoClient");
     // The EventLog provider defaults to Warning; connection state is worth seeing there.
-    builder.Logging.AddFilter<Microsoft.Extensions.Logging.EventLog.EventLogLoggerProvider>("ReverseLlama.Client", LogLevel.Information);
+    builder.Logging.AddFilter<Microsoft.Extensions.Logging.EventLog.EventLogLoggerProvider>("Ngino.Client", LogLevel.Information);
+    builder.Logging.AddProvider(new FileLoggerProvider(logDirectory));
 
     await builder.Build().RunAsync();
     return 0;

src/Ngino.Client/Properties/AssemblyInfo.cs

@@ -0,0 +1,4 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("Ngino.Client.Tests")]
+[assembly: InternalsVisibleTo("ReverseLlama.Client.Tests")]

src/Ngino.Client/TunnelClient.cs

@@ -4,23 +4,25 @@ using System.Text;
 using System.Text.Json;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Client;
+namespace Ngino.Client;
 
 internal sealed class TunnelClient
 {
     private static readonly TimeSpan ModelRefreshInterval = TimeSpan.FromSeconds(15);
     private static readonly TimeSpan ModelRefreshTimeout = TimeSpan.FromSeconds(10);
     private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
-    private const string EmbeddingWarmupInput = "ReverseLlama warmup";
+    private const string EmbeddingWarmupInput = "Ngino warmup";
 
     private readonly ConcurrentDictionary<string, UpstreamRequest> _activeRequests = new();
+    private readonly ConcurrentDictionary<string, PendingRequestBody> _pendingRequestBodies = new();
     private readonly HttpClient _httpClient;
     private readonly ClientOptions _options;
     private readonly ILogger<TunnelClient> _logger;
     private readonly object _modelSnapshotLock = new();
     private readonly SemaphoreSlim _sendLock = new(1, 1);
+    private readonly LlamaCppManager? _llamaCppManager;
     private List<string> _lastActiveModels = [];
     private List<string> _lastModels = [];
 
@@ -32,15 +34,51 @@ internal sealed class TunnelClient
         {
             Timeout = Timeout.InfiniteTimeSpan
         };
+
+        if (_options.UseLlamaCppViaDocker)
+        {
+            if (string.IsNullOrWhiteSpace(_options.UseOllamaModelsPath))
+            {
+                throw new InvalidOperationException(
+                    "--use-ollama-models-path is required when --use-llama-cpp-via-docker is set.");
+            }
+
+            _llamaCppManager = new LlamaCppManager(
+                _options.UseOllamaModelsPath,
+                _options.LlamaCppDockerImage,
+                _options.LlamaCppBasePort,
+                _logger,
+                _options.LlamaCppFallbackCooldown,
+                _options.LlamaCppParallel);
+        }
     }
 
     public async Task RunAsync(CancellationToken cancellationToken)
     {
+        if (_llamaCppManager is not null)
+        {
+            _logger.LogInformation("Testing Docker availability...");
+            var dockerAvailable = await _llamaCppManager.TestDockerAsync();
+            if (!dockerAvailable)
+            {
+                _logger.LogWarning("Docker is not available. llama.cpp via Docker will not work.");
+            }
+            else
+            {
+                _logger.LogInformation("Docker is available. Using llama.cpp image: {Image}", _llamaCppManager.DockerImage);
+            }
+        }
+
         while (!cancellationToken.IsCancellationRequested)
         {
             using var socket = new ClientWebSocket();
             socket.Options.KeepAliveInterval = TimeSpan.FromSeconds(30);
 
+            if (_options.InsecureSkipTlsVerify)
+            {
+                socket.Options.RemoteCertificateValidationCallback = static (_, _, _, _) => true;
+            }
+
             if (!string.IsNullOrWhiteSpace(_options.Token))
             {
                 socket.Options.SetRequestHeader(ProtocolConstants.TokenHeader, _options.Token);
@@ -149,6 +187,16 @@ internal sealed class TunnelClient
 
     private async Task<List<string>> GetUpstreamModelsAsync(CancellationToken cancellationToken)
     {
+        if (_llamaCppManager is not null)
+        {
+            var models = _llamaCppManager.DiscoverModelsWithBlob();
+            return models
+                .Select(m => m.OllamaName)
+                .Where(name => !string.IsNullOrWhiteSpace(name))
+                .OrderBy(name => name, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+        }
+
         using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_options.Upstream, "/api/tags"));
         using var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
         response.EnsureSuccessStatusCode();
@@ -161,6 +209,17 @@ internal sealed class TunnelClient
 
     private async Task<List<string>> GetActiveUpstreamModelsAsync(CancellationToken cancellationToken)
     {
+        if (_llamaCppManager is not null)
+        {
+            var models = _llamaCppManager.DiscoverModelsWithBlob();
+            return models
+                .Where(m => _llamaCppManager.IsModelActive(m.OllamaName))
+                .Select(m => m.OllamaName)
+                .Where(name => !string.IsNullOrWhiteSpace(name))
+                .OrderBy(name => name, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+        }
+
         using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_options.Upstream, "/api/ps"));
         using var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
 
@@ -285,7 +344,8 @@ internal sealed class TunnelClient
         switch (message.Type)
         {
             case TunnelMessageTypes.HttpRequest:
-                StartRequest(socket, message, cancellationToken);
+                _pendingRequestBodies[message.RequestId] = new PendingRequestBody();
+                _ = Task.Run(() => StartRequest(socket, message, cancellationToken), cancellationToken);
                 break;
 
             case TunnelMessageTypes.HttpRequestBody:
@@ -293,6 +353,10 @@ internal sealed class TunnelClient
                 {
                     requestWithBody.AddBody(message.Body ?? []);
                 }
+                else if (_pendingRequestBodies.TryGetValue(message.RequestId, out var pendingBody))
+                {
+                    pendingBody.AddBody(message.Body ?? []);
+                }
                 break;
 
             case TunnelMessageTypes.HttpRequestComplete:
@@ -300,6 +364,10 @@ internal sealed class TunnelClient
                 {
                     completedRequest.CompleteBody();
                 }
+                else if (_pendingRequestBodies.TryGetValue(message.RequestId, out var pendingBody))
+                {
+                    pendingBody.Complete();
+                }
                 break;
 
             case TunnelMessageTypes.Cancel:
@@ -307,6 +375,10 @@ internal sealed class TunnelClient
                 {
                     cancelledRequest.Cancel();
                 }
+                else
+                {
+                    _pendingRequestBodies.TryRemove(message.RequestId, out _);
+                }
                 break;
 
             case TunnelMessageTypes.ModelCommand:
@@ -358,6 +430,11 @@ internal sealed class TunnelClient
             throw new InvalidOperationException("Model command is missing a model name.");
         }
 
+        if (_llamaCppManager is not null)
+        {
+            return await ExecuteModelCommandWithLlamaCppAsync(message, cancellationToken);
+        }
+
         using var request = BuildModelCommandRequest(message);
         using var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
         var body = await response.Content.ReadAsByteArrayAsync(cancellationToken);
@@ -374,6 +451,126 @@ internal sealed class TunnelClient
         return BuildModelCommandResult(message.RequestId, response, body);
     }
 
+    private async Task<TunnelMessage> ExecuteModelCommandWithLlamaCppAsync(
+        TunnelMessage message, CancellationToken cancellationToken)
+    {
+        var modelName = message.Model?.Trim();
+        var normalizedCommand = NormalizeModelCommand(message.Command);
+
+        switch (normalizedCommand)
+        {
+            case "load":
+            {
+                var models = _llamaCppManager!.DiscoverModelsWithBlob();
+                var model = models.FirstOrDefault(m =>
+                    string.Equals(m.OllamaName, modelName, StringComparison.OrdinalIgnoreCase));
+
+                if (model is null)
+                {
+                    return new TunnelMessage
+                    {
+                        Type = TunnelMessageTypes.ModelCommandResult,
+                        RequestId = message.RequestId,
+                        StatusCode = 404,
+                        Error = $"Model '{modelName}' not found in Ollama models path."
+                    };
+                }
+
+                var started = await _llamaCppManager.StartModelContainerAsync(model, cancellationToken);
+                if (!started)
+                {
+                    _logger.LogWarning(
+                        "Unable to load model '{Model}' via llama.cpp. Falling back to Ollama upstream.",
+                        modelName);
+
+                    using var fallbackRequest = BuildModelCommandRequest(_options.Upstream, "load", modelName);
+                    using var fallbackResponse = await _httpClient.SendAsync(
+                        fallbackRequest, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+                    var fallbackBody = await fallbackResponse.Content.ReadAsByteArrayAsync(cancellationToken);
+
+                    return BuildModelCommandResult(message.RequestId, fallbackResponse, fallbackBody);
+                }
+
+                return BuildModelCommandResult(message.RequestId, 200, "OK", []);
+            }
+
+            case "unload":
+            {
+                var stopped = await _llamaCppManager!.StopModelContainerAsync(modelName!, cancellationToken);
+                if (!stopped)
+                {
+                    _logger.LogWarning(
+                        "No running llama.cpp container for model '{Model}'. Falling back to Ollama upstream to unload it.",
+                        modelName);
+
+                    _llamaCppManager.ClearModelFallback(modelName!);
+
+                    using var fallbackRequest = BuildModelCommandRequest(_options.Upstream, "unload", modelName);
+                    using var fallbackResponse = await _httpClient.SendAsync(
+                        fallbackRequest, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+                    var fallbackBody = await fallbackResponse.Content.ReadAsByteArrayAsync(cancellationToken);
+
+                    return BuildModelCommandResult(message.RequestId, fallbackResponse, fallbackBody);
+                }
+
+                return BuildModelCommandResult(message.RequestId, 200, "OK", []);
+            }
+
+            case "pull":
+            case "delete":
+            {
+                using var request = BuildModelCommandRequest(_options.Upstream, message.Command, message.Model);
+                using var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+                var body = await response.Content.ReadAsByteArrayAsync(cancellationToken);
+                return BuildModelCommandResult(message.RequestId, response, body);
+            }
+
+            case "show":
+            {
+                var models = _llamaCppManager!.DiscoverModelsWithBlob();
+                var model = models.FirstOrDefault(m =>
+                    string.Equals(m.OllamaName, modelName, StringComparison.OrdinalIgnoreCase));
+
+                if (model is null)
+                {
+                    return new TunnelMessage
+                    {
+                        Type = TunnelMessageTypes.ModelCommandResult,
+                        RequestId = message.RequestId,
+                        StatusCode = 404,
+                        Error = $"Model '{modelName}' not found in Ollama models path."
+                    };
+                }
+
+                var showResponse = new
+                {
+                    modelfile = $"# llama.cpp via Docker\nFROM {model.BlobDigest}\n",
+                    details = new
+                    {
+                        format = "gguf",
+                        family = "llama",
+                        parameter_size = "",
+                        quantization_level = ""
+                    },
+                    model_info = new { }
+                };
+
+                var body = JsonSerializer.SerializeToUtf8Bytes(showResponse, JsonOptions);
+                return new TunnelMessage
+                {
+                    Type = TunnelMessageTypes.ModelCommandResult,
+                    RequestId = message.RequestId,
+                    StatusCode = 200,
+                    ReasonPhrase = "OK",
+                    Body = body
+                };
+            }
+
+            default:
+                throw new InvalidOperationException($"Unsupported model command '{message.Command}' with llama.cpp.");
+        }
+    }
+
     private static TunnelMessage BuildModelCommandResult(
         string requestId,
         HttpResponseMessage response,
@@ -389,6 +586,19 @@ internal sealed class TunnelClient
         };
     }
 
+    private static TunnelMessage BuildModelCommandResult(
+        string requestId, int statusCode, string reasonPhrase, byte[] body)
+    {
+        return new TunnelMessage
+        {
+            Type = TunnelMessageTypes.ModelCommandResult,
+            RequestId = requestId,
+            StatusCode = statusCode,
+            ReasonPhrase = reasonPhrase,
+            Body = body
+        };
+    }
+
     private static bool ShouldRetryModelCommandWithEmbedding(
         string? command,
         HttpResponseMessage response,
@@ -484,15 +694,122 @@ internal sealed class TunnelClient
     private static StringContent JsonContent<T>(T value) =>
         new(JsonSerializer.Serialize(value, JsonOptions), Encoding.UTF8, "application/json");
 
-    private void StartRequest(ClientWebSocket socket, TunnelMessage message, CancellationToken cancellationToken)
+    private async Task StartRequest(ClientWebSocket socket, TunnelMessage message, CancellationToken cancellationToken)
     {
+        Uri? effectiveUpstream = null;
+        var modelName = UpstreamRequest.ExtractModelName(message);
+
+        if (_llamaCppManager is not null)
+        {
+            if (modelName is not null)
+            {
+                effectiveUpstream = _llamaCppManager.GetUpstream(modelName);
+                if (effectiveUpstream is not null)
+                {
+                    var running = await _llamaCppManager.IsContainerRunningAsync(modelName);
+                    if (!running)
+                    {
+                        _logger.LogWarning(
+                            "Cached llama.cpp container for model '{Model}' is not running anymore. Starting a fresh one on demand...",
+                            modelName);
+                        effectiveUpstream = null;
+                    }
+                }
+
+                if (effectiveUpstream is null)
+                {
+                    var model = _llamaCppManager.DiscoverModelsWithBlob()
+                        .FirstOrDefault(m => string.Equals(m.OllamaName, modelName, StringComparison.OrdinalIgnoreCase));
+
+                    if (model is not null)
+                    {
+                        if (_llamaCppManager.IsModelOnFallback(modelName))
+                        {
+                            _logger.LogInformation(
+                                "Model '{Model}' previously failed to load via llama.cpp. Routing directly to the Ollama upstream.",
+                                modelName);
+                        }
+                        else
+                        {
+                            _logger.LogInformation(
+                                "Request for model '{Model}' but no llama.cpp container is running. Starting one on demand...",
+                                modelName);
+
+                            var started = await _llamaCppManager.StartModelContainerAsync(model, cancellationToken);
+                            if (started)
+                            {
+                                effectiveUpstream = _llamaCppManager.GetUpstream(modelName);
+                            }
+                            else
+                            {
+                                _logger.LogWarning(
+                                    "Unable to load model '{Model}' via llama.cpp. Falling back to the Ollama upstream.",
+                                    modelName);
+                            }
+                        }
+                    }
+                    else
+                    {
+                        _logger.LogWarning(
+                            "Model '{Model}' was not found in the Ollama models path. Falling back to default upstream.",
+                            modelName);
+                    }
+                }
+            }
+        }
+
+        // When llama.cpp backend is active, set up request/response translation
+        Func<string, string?>? pathTransform = null;
+        Func<byte[], byte[]>? bodyTransform = null;
+        Func<HttpResponseMessage, CancellationToken, Task>? responseHandler = null;
+        string? translatorModelName = null;
+
+        if (_llamaCppManager is not null && effectiveUpstream is not null && modelName is not null)
+        {
+            var translator = new OllamaToLlamaCppTranslator(modelName, _logger);
+            translatorModelName = modelName;
+            bool originalRequestedStream = true;
+
+            pathTransform = path =>
+            {
+                if (translator.TryTranslatePath(message.Method ?? "GET", path, out var newPath))
+                {
+                    return newPath;
+                }
+                return null;
+            };
+
+            bodyTransform = body =>
+            {
+                originalRequestedStream = OllamaToLlamaCppTranslator.ExtractOriginalStream(body, message.PathAndQuery ?? "/");
+                return translator.TranslateBody(message.PathAndQuery ?? "/", body);
+            };
+
+            responseHandler = translator.CreateResponseHandler(
+                (response, token) => SendAsync(socket, response, token),
+                message.RequestId,
+                message.PathAndQuery ?? "/",
+                () => originalRequestedStream);
+        }
+
         var request = new UpstreamRequest(
             _options,
             _httpClient,
             message,
             (response, token) => SendAsync(socket, response, token),
             requestId => _activeRequests.TryRemove(requestId, out _),
-            cancellationToken);
+            cancellationToken,
+            effectiveUpstream: effectiveUpstream,
+            responseHandler: responseHandler,
+            pathTransform: pathTransform,
+            bodyTransform: bodyTransform,
+            onConnectionRefused: () =>
+            {
+                if (_llamaCppManager is not null && modelName is not null)
+                {
+                    _llamaCppManager.RemoveModelMapping(modelName);
+                }
+            });
 
         if (!_activeRequests.TryAdd(message.RequestId, request))
         {
@@ -505,10 +822,16 @@ internal sealed class TunnelClient
                     Error = "Duplicate request id."
                 },
                 cancellationToken);
+            _pendingRequestBodies.TryRemove(message.RequestId, out _);
             return;
         }
 
-        _ = Task.Run(request.RunAsync, cancellationToken);
+        if (_pendingRequestBodies.TryRemove(message.RequestId, out var pendingBody))
+        {
+            pendingBody.TransferTo(request);
+        }
+
+        await request.RunAsync();
     }
 
     private async Task SendAsync(ClientWebSocket socket, TunnelMessage message, CancellationToken cancellationToken)
@@ -536,5 +859,51 @@ internal sealed class TunnelClient
                 request.Cancel();
             }
         }
+
+        _pendingRequestBodies.Clear();
+    }
+}
+
+internal sealed class PendingRequestBody
+{
+    private readonly List<byte[]> _chunks = [];
+    private bool _completed;
+    private readonly object _lock = new();
+
+    public void AddBody(byte[] chunk)
+    {
+        if (chunk.Length == 0)
+            return;
+
+        lock (_lock)
+        {
+            _chunks.Add(chunk);
+        }
+    }
+
+    public void Complete()
+    {
+        lock (_lock)
+        {
+            _completed = true;
+        }
+    }
+
+    public void TransferTo(UpstreamRequest request)
+    {
+        lock (_lock)
+        {
+            foreach (var chunk in _chunks)
+            {
+                request.AddBody(chunk);
+            }
+
+            _chunks.Clear();
+
+            if (_completed)
+            {
+                request.CompleteBody();
+            }
+        }
     }
 }

src/Ngino.Client/TunnelWorker.cs

@@ -1,6 +1,6 @@
 using Microsoft.Extensions.Hosting;
 
-namespace ReverseLlama.Client;
+namespace Ngino.Client;
 
 internal sealed class TunnelWorker : BackgroundService
 {

src/Ngino.Client/UpstreamRequest.cs

@@ -1,8 +1,9 @@
 using System.Net.Http.Headers;
+using System.Net.Sockets;
 using System.Threading.Channels;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Client;
+namespace Ngino.Client;
 
 internal sealed class UpstreamRequest
 {
@@ -19,7 +20,8 @@ internal sealed class UpstreamRequest
         "Trailer",
         "Transfer-Encoding",
         "Upgrade",
-        ProtocolConstants.TokenHeader
+        ProtocolConstants.TokenHeader,
+        ProtocolConstants.ModelHeader
     };
 
     private readonly CancellationTokenSource _cancellationTokenSource;
@@ -33,8 +35,13 @@ internal sealed class UpstreamRequest
     private readonly HttpClient _httpClient;
     private readonly TunnelMessage _initialMessage;
     private readonly Action<string> _onComplete;
-    private readonly ClientOptions _options;
+    private readonly Uri _upstream;
     private readonly Func<TunnelMessage, CancellationToken, Task> _sendAsync;
+    private readonly Func<HttpResponseMessage, CancellationToken, Task>? _responseHandler;
+    private readonly Func<string, string?>? _pathTransform;
+    private readonly Func<byte[], byte[]>? _bodyTransform;
+    private readonly Action? _onConnectionRefused;
+    private readonly List<byte[]> _bufferedBody = [];
 
     public UpstreamRequest(
         ClientOptions options,
@@ -42,13 +49,22 @@ internal sealed class UpstreamRequest
         TunnelMessage initialMessage,
         Func<TunnelMessage, CancellationToken, Task> sendAsync,
         Action<string> onComplete,
-        CancellationToken cancellationToken)
+        CancellationToken cancellationToken,
+        Uri? effectiveUpstream = null,
+        Func<HttpResponseMessage, CancellationToken, Task>? responseHandler = null,
+        Func<string, string?>? pathTransform = null,
+        Func<byte[], byte[]>? bodyTransform = null,
+        Action? onConnectionRefused = null)
     {
-        _options = options;
         _httpClient = httpClient;
         _initialMessage = initialMessage;
         _sendAsync = sendAsync;
         _onComplete = onComplete;
+        _upstream = effectiveUpstream ?? options.Upstream;
+        _responseHandler = responseHandler;
+        _pathTransform = pathTransform;
+        _bodyTransform = bodyTransform;
+        _onConnectionRefused = onConnectionRefused;
         _cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
 
         if (!initialMessage.HasBody)
@@ -61,12 +77,36 @@ internal sealed class UpstreamRequest
     {
         if (body.Length > 0)
         {
-            _requestBody.Writer.TryWrite(body);
+            if (_bodyTransform is not null)
+            {
+                _bufferedBody.Add(body);
+            }
+            else
+            {
+                _requestBody.Writer.TryWrite(body);
+            }
         }
     }
 
-    public void CompleteBody() =>
+    public void CompleteBody()
+    {
+        if (_bodyTransform is not null && _bufferedBody.Count > 0)
+        {
+            var totalLength = _bufferedBody.Sum(b => b.Length);
+            var concatenated = new byte[totalLength];
+            var offset = 0;
+            foreach (var chunk in _bufferedBody)
+            {
+                chunk.CopyTo(concatenated, offset);
+                offset += chunk.Length;
+            }
+
+            var transformed = _bodyTransform(concatenated);
+            _requestBody.Writer.TryWrite(transformed);
+        }
+
         _requestBody.Writer.TryComplete();
+    }
 
     public void Cancel()
     {
@@ -84,22 +124,40 @@ internal sealed class UpstreamRequest
                 HttpCompletionOption.ResponseHeadersRead,
                 _cancellationTokenSource.Token);
 
-            await SendResponseHeadersAsync(response);
+            if (_responseHandler is not null)
-            await SendResponseBodyAsync(response);
+            {
+                await _responseHandler(response, _cancellationTokenSource.Token);
+            }
+            else
+            {
+                await SendResponseHeadersAsync(response);
+                await SendResponseBodyAsync(response);
 
-            await _sendAsync(
+                await _sendAsync(
-                new TunnelMessage
+                    new TunnelMessage
-                {
+                    {
-                    Type = TunnelMessageTypes.HttpResponseComplete,
+                        Type = TunnelMessageTypes.HttpResponseComplete,
-                    RequestId = _initialMessage.RequestId
+                        RequestId = _initialMessage.RequestId
-                },
+                    },
-                _cancellationTokenSource.Token);
+                    _cancellationTokenSource.Token);
+            }
         }
         catch (OperationCanceledException) when (_cancellationTokenSource.IsCancellationRequested)
         {
         }
         catch (Exception exception)
         {
+            if (IsConnectionRefused(exception))
+            {
+                try
+                {
+                    _onConnectionRefused?.Invoke();
+                }
+                catch
+                {
+                }
+            }
+
             await SendErrorAsync(exception);
         }
         finally
@@ -110,10 +168,39 @@ internal sealed class UpstreamRequest
         }
     }
 
+    public static string? ExtractModelName(TunnelMessage message)
+    {
+        if (message.Headers is null)
+        {
+            return null;
+        }
+
+        foreach (var header in message.Headers)
+        {
+            if (string.Equals(header.Name, ProtocolConstants.ModelHeader, StringComparison.OrdinalIgnoreCase)
+                && !string.IsNullOrWhiteSpace(header.Value))
+            {
+                return header.Value;
+            }
+        }
+
+        return null;
+    }
+
     private HttpRequestMessage BuildHttpRequest()
     {
+        var path = _initialMessage.PathAndQuery ?? "/";
+        if (_pathTransform is not null)
+        {
+            var transformed = _pathTransform(path);
+            if (transformed is not null)
+            {
+                path = transformed;
+            }
+        }
+
         var method = new HttpMethod(_initialMessage.Method ?? HttpMethod.Get.Method);
-        var request = new HttpRequestMessage(method, BuildUpstreamUri(_options.Upstream, _initialMessage.PathAndQuery));
+        var request = new HttpRequestMessage(method, BuildUpstreamUri(_upstream, path));
 
         if (_initialMessage.HasBody)
         {
@@ -185,7 +272,7 @@ internal sealed class UpstreamRequest
     private async Task SendResponseBodyAsync(HttpResponseMessage response)
     {
         await using var stream = await response.Content.ReadAsStreamAsync(_cancellationTokenSource.Token);
-        var buffer = new byte[_options.ChunkSize];
+        var buffer = new byte[_upstream switch { _ => 64 * 1024 }];
 
         while (true)
         {
@@ -224,6 +311,25 @@ internal sealed class UpstreamRequest
         }
     }
 
+    internal static bool IsConnectionRefused(Exception exception)
+    {
+        for (var current = exception; current is not null; current = current.InnerException)
+        {
+            if (current is SocketException socketException
+                && socketException.SocketErrorCode == SocketError.ConnectionRefused)
+            {
+                return true;
+            }
+
+            if (current.Message.Contains("Connection refused", StringComparison.OrdinalIgnoreCase))
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     private static List<HeaderPair> CollectResponseHeaders(HttpResponseMessage response)
     {
         var headers = new List<HeaderPair>();

src/Ngino.Protocol/HeaderPair.cs

@@ -1,4 +1,4 @@
-namespace ReverseLlama.Protocol;
+namespace Ngino.Protocol;
 
 public sealed class HeaderPair
 {

src/Ngino.Protocol/ProtocolConstants.cs

@@ -0,0 +1,11 @@
+namespace Ngino.Protocol;
+
+public static class ProtocolConstants
+{
+    public const string DefaultStatusPath = "/_ngino/status";
+    public const string DefaultTunnelPath = "/_ngino/tunnel";
+    public const string TokenHeader = "X-Ngino-Token";
+    public const string ClientIdHeader = "X-Ngino-Client-Id";
+    public const string ReplacedCloseDescription = "ngino-replaced";
+public const string ModelHeader = "X-Ngino-Model";
+}

src/Ngino.Protocol/TunnelMessage.cs

@@ -1,4 +1,4 @@
-namespace ReverseLlama.Protocol;
+namespace Ngino.Protocol;
 
 public sealed class TunnelMessage
 {

src/Ngino.Protocol/TunnelMessageTypes.cs

@@ -1,4 +1,4 @@
-namespace ReverseLlama.Protocol;
+namespace Ngino.Protocol;
 
 public static class TunnelMessageTypes
 {

src/Ngino.Protocol/WebSocketMessageTransport.cs

@@ -1,7 +1,7 @@
 using System.Net.WebSockets;
 using System.Text.Json;
 
-namespace ReverseLlama.Protocol;
+namespace Ngino.Protocol;
 
 public static class WebSocketMessageTransport
 {

src/Ngino.Server/AdminEndpoints.cs

@@ -0,0 +1,948 @@
+using System.Security.Claims;
+using System.Text;
+using System.Text.Json;
+using Microsoft.AspNetCore.Antiforgery;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.StaticFiles;
+using Microsoft.EntityFrameworkCore;
+using Ngino.Server.Data;
+using Ngino.Server.Models;
+
+namespace Ngino.Server;
+
+internal static class AdminEndpoints
+{
+    private static readonly FileExtensionContentTypeProvider ContentTypes = new();
+
+    public static void MapAdminEndpoints(this WebApplication app, ServerSettings settings)
+    {
+        if (settings.Keycloak.IsConfigured)
+        {
+            app.MapGet("/admin/login", (string? returnUrl) =>
+                Results.Challenge(
+                    new AuthenticationProperties { RedirectUri = NormalizeLocalReturnUrl(returnUrl) },
+                    [OpenIdConnectDefaults.AuthenticationScheme]))
+                .AllowAnonymous();
+
+            app.MapPost("/admin/logout", () =>
+                Results.SignOut(
+                    new AuthenticationProperties { RedirectUri = "/admin" },
+                    [CookieAuthenticationDefaults.AuthenticationScheme, OpenIdConnectDefaults.AuthenticationScheme]))
+                .RequireAuthorization();
+        }
+        else
+        {
+            app.MapGet("/admin/login", async (HttpContext context, SignInManager<ApplicationUser> signInManager, IAntiforgery antiforgery, string? returnUrl) =>
+            {
+                if (context.User.Identity?.IsAuthenticated == true)
+                    return Results.Redirect(NormalizeLocalReturnUrl(returnUrl));
+
+                if (await signInManager.UserManager.Users.AnyAsync())
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(LoginPage(NormalizeLocalReturnUrl(returnUrl), null, tokens.RequestToken!), "text/html");
+                }
+
+                return Results.Redirect("/admin/setup");
+            }).AllowAnonymous();
+
+            app.MapPost("/admin/login", async (HttpContext context, SignInManager<ApplicationUser> signInManager, IAntiforgery antiforgery, string? returnUrl, [FromForm] string? username, [FromForm] string? password) =>
+            {
+                if (await signInManager.UserManager.Users.AnyAsync() == false)
+                    return Results.Redirect("/admin/setup");
+
+                if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(LoginPage(NormalizeLocalReturnUrl(returnUrl), "Username and password are required.", tokens.RequestToken!), "text/html");
+                }
+
+                var result = await signInManager.PasswordSignInAsync(username, password, true, true);
+                if (result.Succeeded)
+                    return Results.Redirect(NormalizeLocalReturnUrl(returnUrl));
+
+                if (result.IsLockedOut)
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(LoginPage(NormalizeLocalReturnUrl(returnUrl), "Account is locked out.", tokens.RequestToken!), "text/html");
+                }
+
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(LoginPage(NormalizeLocalReturnUrl(returnUrl), "Invalid username or password.", tokens.RequestToken!), "text/html");
+                }
+            }).AllowAnonymous();
+
+            app.MapGet("/admin/setup", async (HttpContext context, SignInManager<ApplicationUser> signInManager, IAntiforgery antiforgery) =>
+            {
+                if (context.User.Identity?.IsAuthenticated == true)
+                    return Results.Redirect("/admin");
+
+                if (await signInManager.UserManager.Users.AnyAsync())
+                    return Results.Redirect("/admin/login");
+
+                var tokens = antiforgery.GetAndStoreTokens(context);
+                return Results.Content(SetupPage(null, tokens.RequestToken!), "text/html");
+            }).AllowAnonymous();
+
+            app.MapPost("/admin/setup", async (HttpContext context, SignInManager<ApplicationUser> signInManager, IAntiforgery antiforgery, [FromForm] string? username, [FromForm] string? email, [FromForm] string? password, [FromForm] string? confirmPassword) =>
+            {
+                if (await signInManager.UserManager.Users.AnyAsync())
+                    return Results.Redirect("/admin/login");
+
+                if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(SetupPage("Username and password are required.", tokens.RequestToken!), "text/html");
+                }
+
+                if (password != confirmPassword)
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(SetupPage("Passwords do not match.", tokens.RequestToken!), "text/html");
+                }
+
+                var user = new ApplicationUser { UserName = username, Email = email };
+                var result = await signInManager.UserManager.CreateAsync(user, password);
+                if (result.Succeeded)
+                {
+                    await signInManager.SignInAsync(user, true);
+                    return Results.Redirect("/admin");
+                }
+
+                var errors = string.Join(" ", result.Errors.Select(e => e.Description));
+                {
+                    var tokens = antiforgery.GetAndStoreTokens(context);
+                    return Results.Content(SetupPage(errors, tokens.RequestToken!), "text/html");
+                }
+            }).AllowAnonymous();
+
+            app.MapPost("/admin/logout", async (SignInManager<ApplicationUser> signInManager) =>
+            {
+                await signInManager.SignOutAsync();
+                return Results.Redirect("/admin/login");
+            }).RequireAuthorization();
+        }
+
+        app.MapGet("/admin/auth-error", () =>
+            Results.Text(
+                "Login failed while processing the Keycloak callback. The exception was written to ELMAH.",
+                "text/plain"))
+            .AllowAnonymous();
+
+        var api = app.MapGroup("/api/admin");
+
+        if (settings.Keycloak.IsConfigured)
+        {
+            api.RequireAuthorization();
+        }
+        else
+        {
+            api.RequireAuthorization();
+        }
+
+        api.MapGet("/summary", (HttpContext context, TunnelHub hub, ManagementStore store) =>
+            Results.Json(BuildSummary(context.User, hub, store, settings)));
+
+        api.MapGet("/me", (HttpContext context, ManagementStore store) =>
+            Results.Json(new
+            {
+                authenticated = context.User.Identity?.IsAuthenticated ?? false,
+                name = GetUserName(context.User),
+                keycloakConfigured = settings.Keycloak.IsConfigured,
+                management = new
+                {
+                    available = store.IsAvailable,
+                    databasePath = store.DatabasePath,
+                    lastError = store.LastError
+                }
+            }));
+
+        api.MapPost("/clients/{clientId}/disable", (string clientId, DisableClientRequest request, ManagementStore store) =>
+        {
+            try
+            {
+                var manual = string.Equals(request.Mode, "manual", StringComparison.OrdinalIgnoreCase);
+
+                TimeSpan? duration = manual
+                    ? null
+                    : request.DurationMinutes is { } minutes
+                        ? TimeSpan.FromMinutes(Math.Clamp(minutes, 1, 24 * 60))
+                        : null;
+
+                store.DisableClient(clientId, duration, manual, request.Reason, request.StartAtUtc, request.UntilUtc);
+                return Results.Ok(new { clientId, disabled = true });
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapPost("/clients/{clientId}/enable", (string clientId, ManagementStore store) =>
+        {
+            try
+            {
+                store.EnableClient(clientId);
+                return Results.Ok(new { clientId, disabled = false });
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapGet("/models/detail", async (
+            HttpContext context,
+            string model,
+            string? clientId,
+            TunnelHub hub,
+            ManagementStore store) =>
+        {
+            if (string.IsNullOrWhiteSpace(model))
+            {
+                return Results.BadRequest(new { error = "Model is required." });
+            }
+
+            var modelSummary = BuildModelSummaries(hub, store)
+                .FirstOrDefault(item => item.Name.Equals(model, StringComparison.OrdinalIgnoreCase));
+            var selectedClientId = ResolveModelClientId(hub, modelSummary, model, clientId);
+            object? show = null;
+
+            if (!string.IsNullOrWhiteSpace(selectedClientId))
+            {
+                var connection = hub.Get(selectedClientId);
+                if (connection is not null)
+                {
+                    show = await SendModelCommandForApiAsync(
+                        connection,
+                        "show",
+                        model,
+                        TimeSpan.FromSeconds(60),
+                        context.RequestAborted);
+                }
+            }
+
+            return Results.Json(new
+            {
+                model,
+                listedClients = modelSummary?.ListedClients ?? [],
+                activeClients = modelSummary?.ActiveClients ?? [],
+                metrics = modelSummary?.Metrics ?? EmptyModelMetrics(),
+                selectedClientId,
+                show
+            });
+        });
+
+        api.MapPost("/models/actions", async (
+            HttpContext context,
+            ModelActionRequest request,
+            TunnelHub hub) =>
+        {
+            if (string.IsNullOrWhiteSpace(request.ClientId)
+                || string.IsNullOrWhiteSpace(request.Model)
+                || string.IsNullOrWhiteSpace(request.Action))
+            {
+                return Results.BadRequest(new { error = "Client id, model, and action are required." });
+            }
+
+            if (!TryMapModelAction(request.Action, out var command, out var timeout))
+            {
+                return Results.BadRequest(new { error = $"Unsupported action '{request.Action}'." });
+            }
+
+            var connection = hub.Get(request.ClientId);
+            if (connection is null)
+            {
+                return Results.NotFound(new { error = $"Client '{request.ClientId}' is not connected." });
+            }
+
+            var result = await SendModelCommandForApiAsync(
+                connection,
+                command,
+                request.Model,
+                timeout,
+                context.RequestAborted);
+
+            return Results.Json(result);
+        });
+
+        api.MapGet("/user-keys", (ManagementStore store) =>
+            Results.Json(store.ListUserKeys()));
+
+        api.MapPost("/user-keys", (CreateUserKeyRequest request, ManagementStore store) =>
+        {
+            try
+            {
+                return Results.Json(store.CreateUserKey(request.Name));
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapDelete("/user-keys/{id}", (string id, ManagementStore store) =>
+            store.DeleteUserKey(id)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"User key '{id}' was not found." }));
+
+        api.MapGet("/client-keys", (ManagementStore store) =>
+            Results.Json(store.ListClientKeys()));
+
+        api.MapPost("/client-keys", (CreateUserKeyRequest request, ManagementStore store) =>
+        {
+            try
+            {
+                return Results.Json(store.CreateClientKey(request.Name));
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapDelete("/client-keys/{id}", (string id, ManagementStore store) =>
+            store.DeleteClientKey(id)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"Client key '{id}' was not found." }));
+
+        api.MapGet("/groups", (ManagementStore store) =>
+            Results.Json(store.ListGroups()));
+
+        api.MapPost("/groups", (CreateGroupRequest request, ManagementStore store) =>
+        {
+            try
+            {
+                return Results.Json(store.CreateGroup(request.Name));
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapGet("/groups/{id}", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            return group is not null
+                ? Results.Json(group)
+                : Results.NotFound(new { error = $"Group '{id}' was not found." });
+        });
+
+        api.MapPut("/groups/{id}", (string id, UpdateGroupRequest request, ManagementStore store) =>
+        {
+            if (string.IsNullOrWhiteSpace(request.Name))
+            {
+                return Results.BadRequest(new { error = "Name is required." });
+            }
+
+            return store.UpdateGroup(id, request.Name)
+                ? Results.Ok(store.GetGroup(id))
+                : Results.NotFound(new { error = $"Group '{id}' was not found." });
+        });
+
+        api.MapDelete("/groups/{id}", (string id, ManagementStore store) =>
+            store.DeleteGroup(id)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"Group '{id}' was not found." }));
+
+        api.MapGet("/groups/{id}/clients", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            return Results.Json(store.ListGroupClients(id));
+        });
+
+        api.MapPost("/groups/{id}/clients", (string id, AddGroupClientRequest request, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            try
+            {
+                var member = store.AddGroupClient(
+                    id,
+                    request.ClientId,
+                    request.Model,
+                    request.ClientPattern,
+                    request.KeepaliveInstancesToKeepAlive,
+                    request.KeepaliveMaxParallelismPerClient,
+                    request.KeepaliveParallelismHeadroom);
+                return Results.Json(member);
+            }
+            catch (ArgumentException exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = $"Failed to add member: {exception.Message}" });
+            }
+        });
+
+        api.MapDelete("/groups/{groupId}/clients/{clientId:long}", (string groupId, long clientId, ManagementStore store) =>
+        {
+            var group = store.GetGroup(groupId);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{groupId}' was not found." });
+            }
+
+            return store.RemoveGroupClient(clientId)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"Client '{clientId}' was not found." });
+        });
+
+        api.MapGet("/user-keys/groups", (ManagementStore store) =>
+            Results.Json(store.ListUserKeyGroups()));
+
+        api.MapPut("/user-keys/{id}/groups", (string id, SetUserKeyGroupsRequest request, ManagementStore store) =>
+        {
+            var keys = store.ListUserKeys();
+            if (!keys.Any(k => k.Id == id))
+            {
+                return Results.NotFound(new { error = $"User key '{id}' was not found." });
+            }
+
+            try
+            {
+                store.SetUserKeyGroups(id, request.GroupIds ?? []);
+                return Results.Ok(new { userKeyId = id, groupIds = store.GetUserKeyGroupIds(id) });
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapGet("/groups/{id}/billing", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            var billing = store.GetGroupBilling(id);
+            return billing is not null
+                ? Results.Json(billing)
+                : Results.Json(new GroupBillingInfo(id, "EUR", 0, 0, false, DateTimeOffset.UtcNow, DateTimeOffset.UtcNow));
+        });
+
+        api.MapPut("/groups/{id}/billing", (string id, UpdateBillingRequest request, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            try
+            {
+                var billing = store.UpsertGroupBilling(
+                    id,
+                    request.Currency ?? "EUR",
+                    request.DefaultRatePer1k,
+                    request.RefuseBelowBalance,
+                    request.Enabled);
+                return Results.Ok(billing);
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapGet("/groups/{id}/billing/rules", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            return Results.Json(store.ListGroupBillingRules(id));
+        });
+
+        api.MapPost("/groups/{id}/billing/rules", (string id, AddBillingRuleRequest request, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            try
+            {
+                var rule = store.AddBillingRule(id, request.ModelRegex, request.RatePer1k);
+                return Results.Json(rule);
+            }
+            catch (ArgumentException exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapPut("/groups/{id}/billing/rules/{ruleId:long}", (string id, long ruleId, UpdateBillingRuleRequest request, ManagementStore store) =>
+        {
+            try
+            {
+                return store.UpdateBillingRule(ruleId, request.ModelRegex, request.RatePer1k)
+                    ? Results.Ok(new { id = ruleId })
+                    : Results.NotFound(new { error = $"Rule '{ruleId}' was not found." });
+            }
+            catch (ArgumentException exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapDelete("/groups/{id}/billing/rules/{ruleId:long}", (string id, long ruleId, ManagementStore store) =>
+            store.DeleteBillingRule(ruleId)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"Rule '{ruleId}' was not found." }));
+
+        api.MapGet("/groups/{id}/billing/payments", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            return Results.Json(store.ListGroupPayments(id));
+        });
+
+        api.MapPost("/groups/{id}/billing/payments", (string id, AddPaymentRequest request, ManagementStore store, HttpContext context) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            try
+            {
+                var userName = GetUserName(context.User);
+                var payment = store.AddPayment(id, request.Amount, request.Description, userName);
+                return Results.Json(payment);
+            }
+            catch (Exception exception)
+            {
+                return Results.BadRequest(new { error = exception.Message });
+            }
+        });
+
+        api.MapDelete("/groups/{id}/billing/payments/{paymentId:long}", (string id, long paymentId, ManagementStore store) =>
+            store.DeletePayment(paymentId)
+                ? Results.NoContent()
+                : Results.NotFound(new { error = $"Payment '{paymentId}' was not found." }));
+
+        api.MapGet("/groups/{id}/billing/balance", (string id, ManagementStore store) =>
+        {
+            var group = store.GetGroup(id);
+            if (group is null)
+            {
+                return Results.NotFound(new { error = $"Group '{id}' was not found." });
+            }
+
+            return Results.Json(store.GetGroupBalance(id));
+        });
+
+        api.MapGet("/usage/tokens", (ManagementStore store) =>
+            Results.Json(new
+            {
+                byModel = store.GetTokenStatsByModel(),
+                byClient = store.GetTokenStatsByClient(),
+                byUserKey = store.GetTokenStatsByUserKey(),
+                byGroup = store.GetTokenStatsByGroup()
+            }));
+
+        api.MapGet("/usage/revenue", (ManagementStore store) =>
+            Results.Json(store.GetClientRevenue()));
+
+        var adminHome = app.MapGet("/admin", (IWebHostEnvironment environment) =>
+            ServeAdminAsset(environment, null));
+        var adminAssets = app.MapGet("/admin/{**assetPath}", (IWebHostEnvironment environment, string? assetPath) =>
+            ServeAdminAsset(environment, assetPath));
+
+        if (settings.Keycloak.IsConfigured)
+        {
+            adminHome.RequireAuthorization();
+            adminAssets.RequireAuthorization();
+        }
+        else
+        {
+            adminHome.RequireAuthorization();
+            adminAssets.RequireAuthorization();
+        }
+    }
+
+    private static string LoginPage(string returnUrl, string? error, string? antiforgeryToken)
+    {
+        var errorHtml = string.IsNullOrEmpty(error)
+            ? ""
+            : "<div class=\"error\">" + HtmlEncode(error) + "</div>";
+        var loginAction = "/admin/login" + (returnUrl != "/admin" ? "?returnUrl=" + Uri.EscapeDataString(returnUrl) : "");
+
+        return "<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"utf-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n<title>Ngino - Login</title>\n<style>\nbody{font-family:system-ui,sans-serif;background:#1a1a2e;color:#e0e0e0;display:flex;justify-content:center;align-items:center;min-height:100vh;margin:0}\n.card{background:#16213e;border:1px solid #0f3460;border-radius:12px;padding:2rem;width:100%;max-width:400px}\nh1{margin:0 0 1.5rem;font-size:1.5rem;text-align:center;color:#e94560}\nlabel{display:block;margin-bottom:.25rem;font-size:.875rem;color:#a0a0b0}\ninput{width:100%;padding:.5rem;border:1px solid #0f3460;border-radius:6px;background:#1a1a2e;color:#e0e0e0;font-size:1rem;margin-bottom:1rem;box-sizing:border-box}\ninput:focus{outline:none;border-color:#e94560}\nbutton{width:100%;padding:.625rem;border:none;border-radius:6px;background:#e94560;color:#fff;font-size:1rem;font-weight:600;cursor:pointer}\nbutton:hover{background:#c73650}\n.error{background:#3d1a1a;border:1px solid #e94560;border-radius:6px;padding:.5rem .75rem;margin-bottom:1rem;font-size:.875rem;color:#ff6b7a}\n</style>\n</head>\n<body>\n<div class=\"card\">\n<h1>Ngino Admin</h1>\n" + errorHtml + "\n<form method=\"post\" action=\"" + HtmlEncode(loginAction) + "\">\n<input type=\"hidden\" name=\"__RequestVerificationToken\" value=\"" + HtmlEncode(antiforgeryToken) + "\">\n<label for=\"username\">Username</label>\n<input type=\"text\" id=\"username\" name=\"username\" autocomplete=\"username\" required autofocus>\n<label for=\"password\">Password</label>\n<input type=\"password\" id=\"password\" name=\"password\" autocomplete=\"current-password\" required>\n<input type=\"hidden\" name=\"returnUrl\" value=\"" + HtmlEncode(returnUrl) + "\">\n<button type=\"submit\">Sign In</button>\n</form>\n</div>\n</body>\n</html>";
+    }
+
+    private static string SetupPage(string? error, string? antiforgeryToken)
+    {
+        var errorHtml = string.IsNullOrEmpty(error)
+            ? ""
+            : "<div class=\"error\">" + HtmlEncode(error) + "</div>";
+
+        return "<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"utf-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n<title>Ngino - Initial Setup</title>\n<style>\nbody{font-family:system-ui,sans-serif;background:#1a1a2e;color:#e0e0e0;display:flex;justify-content:center;align-items:center;min-height:100vh;margin:0}\n.card{background:#16213e;border:1px solid #0f3460;border-radius:12px;padding:2rem;width:100%;max-width:400px}\nh1{margin:0 0 .25rem;font-size:1.5rem;text-align:center;color:#e94560}\n.subtitle{text-align:center;color:#a0a0b0;margin-bottom:1.5rem;font-size:.875rem}\nlabel{display:block;margin-bottom:.25rem;font-size:.875rem;color:#a0a0b0}\ninput{width:100%;padding:.5rem;border:1px solid #0f3460;border-radius:6px;background:#1a1a2e;color:#e0e0e0;font-size:1rem;margin-bottom:1rem;box-sizing:border-box}\ninput:focus{outline:none;border-color:#e94560}\nbutton{width:100%;padding:.625rem;border:none;border-radius:6px;background:#e94560;color:#fff;font-size:1rem;font-weight:600;cursor:pointer}\nbutton:hover{background:#c73650}\n.error{background:#3d1a1a;border:1px solid #e94560;border-radius:6px;padding:.5rem .75rem;margin-bottom:1rem;font-size:.875rem;color:#ff6b7a}\n</style>\n</head>\n<body>\n<div class=\"card\">\n<h1>Ngino</h1>\n<p class=\"subtitle\">Initial Setup - Create Admin Account</p>\n" + errorHtml + "\n<form method=\"post\" action=\"/admin/setup\" id=\"setupForm\">\n<input type=\"hidden\" name=\"__RequestVerificationToken\" value=\"" + HtmlEncode(antiforgeryToken) + "\">\n<label for=\"username\">Username</label>\n<input type=\"text\" id=\"username\" name=\"username\" autocomplete=\"username\" required autofocus>\n<label for=\"email\">Email (optional)</label>\n<input type=\"email\" id=\"email\" name=\"email\" autocomplete=\"email\">\n<label for=\"password\">Password</label>\n<input type=\"password\" id=\"password\" name=\"password\" autocomplete=\"new-password\" required>\n<label for=\"confirmPassword\">Confirm Password</label>\n<input type=\"password\" id=\"confirmPassword\" name=\"confirmPassword\" autocomplete=\"new-password\" required>\n<button type=\"submit\">Create Account</button>\n</form>\n</div>\n<script>\ndocument.getElementById('setupForm').addEventListener('submit',function(e){\nvar p=document.getElementById('password').value;\nvar c=document.getElementById('confirmPassword').value;\nvar msg=[];\nif(p.length<8)msg.push('at least 8 characters');\nif(!/[a-z]/.test(p))msg.push('a lowercase letter');\nif(!/[A-Z]/.test(p))msg.push('an uppercase letter');\nif(!/[0-9]/.test(p))msg.push('a digit');\nif(p!==c)msg.push('passwords must match');\nif(msg.length){e.preventDefault();var d=document.querySelector('.error');if(!d){d=document.createElement('div');d.className='error';document.getElementById('setupForm').parentNode.insertBefore(d,document.getElementById('setupForm'));}d.textContent='Password needs: '+msg.join(', ')+'.';}});\n</script>\n</body>\n</html>";
+    }
+
+    private static string? HtmlEncode(string? value) =>
+        string.IsNullOrEmpty(value) ? null : System.Net.WebUtility.HtmlEncode(value);
+
+    private static object BuildSummary(
+        ClaimsPrincipal user,
+        TunnelHub hub,
+        ManagementStore store,
+        ServerSettings settings) =>
+        new
+        {
+            generatedAtUtc = DateTimeOffset.UtcNow,
+            user = new
+            {
+                name = GetUserName(user),
+                authenticated = user.Identity?.IsAuthenticated ?? false
+            },
+            auth = new
+            {
+                keycloakConfigured = settings.Keycloak.IsConfigured,
+                sharedTokenConfigured = !string.IsNullOrWhiteSpace(settings.Token),
+                clientTokenConfigured = !string.IsNullOrWhiteSpace(settings.ClientToken),
+                userKeysConfigured = store.HasUserKeys,
+                clientKeysConfigured = store.HasClientKeys
+            },
+            management = new
+            {
+                available = store.IsAvailable,
+                databasePath = store.DatabasePath,
+                lastError = store.LastError
+            },
+            clients = BuildClientSummaries(hub, store),
+            models = BuildModelSummaries(hub, store),
+            userKeys = store.ListUserKeys(),
+            clientKeys = store.ListClientKeys(),
+            groups = store.ListGroups(),
+            userKeyGroups = store.ListUserKeyGroups(),
+            clientGroups = store.ResolveClientGroups(
+                hub.ClientSnapshots.Select(c => c.Id).ToList())
+        };
+
+    private static IReadOnlyList<ClientSummary> BuildClientSummaries(TunnelHub hub, ManagementStore store)
+    {
+        var connected = hub.ClientSnapshots.ToDictionary(client => client.Id, StringComparer.OrdinalIgnoreCase);
+        var controls = store.ListClientControls();
+        var stats = store.GetClientRequestStats();
+        var clientIds = connected.Keys
+            .Concat(controls.Keys)
+            .Concat(stats.Keys)
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .OrderBy(clientId => clientId, StringComparer.OrdinalIgnoreCase);
+        var result = new List<ClientSummary>();
+
+        foreach (var clientId in clientIds)
+        {
+            connected.TryGetValue(clientId, out var snapshot);
+            controls.TryGetValue(clientId, out var access);
+            stats.TryGetValue(clientId, out var requestStats);
+            access ??= ClientAccess.Enabled;
+
+            result.Add(new ClientSummary(
+                clientId,
+                snapshot is not null,
+                snapshot?.PendingRequests ?? 0,
+                snapshot?.Models ?? [],
+                snapshot?.ActiveModels ?? [],
+                snapshot?.ModelsUpdatedAt,
+                access.IsDisabled,
+                access.DisabledFromUtc,
+                access.DisabledUntilUtc,
+                access.DisabledManually,
+                access.DisabledReason,
+                requestStats ?? new ClientRequestStats(0, 0, 0)));
+        }
+
+        return result;
+    }
+
+    private static IReadOnlyList<ModelSummary> BuildModelSummaries(TunnelHub hub, ManagementStore store)
+    {
+        var listedClients = new Dictionary<string, SortedSet<string>>(StringComparer.OrdinalIgnoreCase);
+        var activeClients = new Dictionary<string, SortedSet<string>>(StringComparer.OrdinalIgnoreCase);
+
+        foreach (var client in hub.ClientSnapshots)
+        {
+            AddModelClients(listedClients, client.Models, client.Id);
+            AddModelClients(activeClients, client.ActiveModels, client.Id);
+        }
+
+        var metrics = store.GetModelUsageStats();
+        var modelNames = listedClients.Keys
+            .Concat(activeClients.Keys)
+            .Concat(metrics.Keys)
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .OrderBy(model => model, StringComparer.OrdinalIgnoreCase);
+        var result = new List<ModelSummary>();
+
+        foreach (var model in modelNames)
+        {
+            metrics.TryGetValue(model, out var modelMetrics);
+
+            result.Add(new ModelSummary(
+                model,
+                listedClients.TryGetValue(model, out var listed) ? listed.ToArray() : [],
+                activeClients.TryGetValue(model, out var active) ? active.ToArray() : [],
+                modelMetrics ?? EmptyModelMetrics()));
+        }
+
+        return result;
+    }
+
+    private static void AddModelClients(
+        Dictionary<string, SortedSet<string>> target,
+        IEnumerable<string> models,
+        string clientId)
+    {
+        foreach (var model in models)
+        {
+            if (!target.TryGetValue(model, out var clients))
+            {
+                clients = new SortedSet<string>(StringComparer.OrdinalIgnoreCase);
+                target[model] = clients;
+            }
+
+            clients.Add(clientId);
+        }
+    }
+
+    private static string? ResolveModelClientId(
+        TunnelHub hub,
+        ModelSummary? modelSummary,
+        string model,
+        string? requestedClientId)
+    {
+        if (!string.IsNullOrWhiteSpace(requestedClientId)
+            && hub.Get(requestedClientId) is not null)
+        {
+            return requestedClientId;
+        }
+
+        return modelSummary?.ActiveClients.FirstOrDefault(clientId => hub.Get(clientId) is not null)
+            ?? modelSummary?.ListedClients.FirstOrDefault(clientId => hub.Get(clientId) is not null)
+            ?? hub.SelectBest(model)?.ClientId;
+    }
+
+    private static ModelUsageStats EmptyModelMetrics() =>
+        new(0, 0, 0, 0, 0);
+
+    private static async Task<object> SendModelCommandForApiAsync(
+        TunnelConnection connection,
+        string command,
+        string model,
+        TimeSpan timeout,
+        CancellationToken cancellationToken)
+    {
+        try
+        {
+            var response = await connection.SendModelCommandAsync(
+                command,
+                model,
+                payloadJson: null,
+                timeout,
+                cancellationToken);
+            var body = response.Body is { Length: > 0 }
+                ? Encoding.UTF8.GetString(response.Body)
+                : "";
+
+            return new
+            {
+                ok = response.StatusCode is >= 200 and < 300,
+                statusCode = response.StatusCode,
+                reasonPhrase = response.ReasonPhrase,
+                body = ParseJsonOrText(body)
+            };
+        }
+        catch (OperationCanceledException)
+        {
+            return new
+            {
+                ok = false,
+                statusCode = StatusCodes.Status504GatewayTimeout,
+                reasonPhrase = "Timed out",
+                body = "The model command timed out."
+            };
+        }
+        catch (Exception exception)
+        {
+            return new
+            {
+                ok = false,
+                statusCode = StatusCodes.Status502BadGateway,
+                reasonPhrase = "Command failed",
+                body = exception.Message
+            };
+        }
+    }
+
+    private static object? ParseJsonOrText(string body)
+    {
+        if (string.IsNullOrWhiteSpace(body))
+        {
+            return null;
+        }
+
+        try
+        {
+            using var document = JsonDocument.Parse(body);
+            return document.RootElement.Clone();
+        }
+        catch (JsonException)
+        {
+            return body.Length <= 100_000 ? body : body[..100_000];
+        }
+    }
+
+    private static bool TryMapModelAction(string action, out string command, out TimeSpan timeout)
+    {
+        command = action.Trim().ToLowerInvariant() switch
+        {
+            "add" or "pull" => "pull",
+            "remove" or "delete" => "delete",
+            "load" => "load",
+            "unload" => "unload",
+            _ => ""
+        };
+
+        timeout = command == "pull" ? TimeSpan.FromMinutes(30) : TimeSpan.FromMinutes(2);
+        return command.Length > 0;
+    }
+
+    private static IResult ServeAdminAsset(IWebHostEnvironment environment, string? assetPath)
+    {
+        var path = string.IsNullOrWhiteSpace(assetPath) ? "index.html" : assetPath;
+
+        if (path.Contains("..", StringComparison.Ordinal)
+            || path.Contains('\\'))
+        {
+            return Results.BadRequest();
+        }
+
+        var file = environment.WebRootFileProvider.GetFileInfo($"admin/{path}");
+        if (!file.Exists && !Path.HasExtension(path))
+        {
+            file = environment.WebRootFileProvider.GetFileInfo("admin/index.html");
+        }
+
+        if (!file.Exists)
+        {
+            return Results.NotFound();
+        }
+
+        ContentTypes.TryGetContentType(file.Name, out var contentType);
+        return Results.Stream(file.CreateReadStream(), contentType ?? "application/octet-stream");
+    }
+
+    private static string NormalizeLocalReturnUrl(string? returnUrl)
+    {
+        if (string.IsNullOrWhiteSpace(returnUrl)
+            || !returnUrl.StartsWith("/", StringComparison.Ordinal)
+            || returnUrl.StartsWith("//", StringComparison.Ordinal))
+        {
+            return "/admin";
+        }
+
+        return returnUrl;
+    }
+
+    private static string? GetUserName(ClaimsPrincipal user) =>
+        user.FindFirst("preferred_username")?.Value
+        ?? user.FindFirst(ClaimTypes.Name)?.Value
+        ?? user.Identity?.Name;
+}
+
+internal sealed record DisableClientRequest(
+    string? Mode,
+    int? DurationMinutes,
+    string? Reason,
+    DateTimeOffset? StartAtUtc,
+    DateTimeOffset? UntilUtc);
+
+internal sealed record ModelActionRequest(
+    string ClientId,
+    string Model,
+    string Action);
+
+internal sealed record CreateUserKeyRequest(string? Name);
+
+internal sealed record CreateGroupRequest(string? Name);
+
+internal sealed record UpdateGroupRequest(string Name);
+
+internal sealed record AddGroupClientRequest(
+    string? ClientId,
+    string? Model,
+    string? ClientPattern,
+    int? KeepaliveInstancesToKeepAlive,
+    int? KeepaliveMaxParallelismPerClient,
+    int? KeepaliveParallelismHeadroom);
+
+internal sealed record SetUserKeyGroupsRequest(IReadOnlyList<string>? GroupIds);
+
+internal sealed record UpdateBillingRequest(
+    string? Currency,
+    double DefaultRatePer1k,
+    double RefuseBelowBalance,
+    bool Enabled);
+
+internal sealed record AddBillingRuleRequest(
+    string ModelRegex,
+    double RatePer1k);
+
+internal sealed record UpdateBillingRuleRequest(
+    string ModelRegex,
+    double RatePer1k);
+
+internal sealed record AddPaymentRequest(
+    double Amount,
+    string? Description);
+
+internal sealed record ClientSummary(
+    string Id,
+    bool Connected,
+    int PendingRequests,
+    IReadOnlyList<string> Models,
+    IReadOnlyList<string> ActiveModels,
+    DateTimeOffset? ModelsUpdatedAt,
+    bool Disabled,
+    DateTimeOffset? DisabledFromUtc,
+    DateTimeOffset? DisabledUntilUtc,
+    bool DisabledManually,
+    string? DisabledReason,
+    ClientRequestStats RequestStats);
+
+internal sealed record ModelSummary(
+    string Name,
+    IReadOnlyList<string> ListedClients,
+    IReadOnlyList<string> ActiveClients,
+    ModelUsageStats Metrics);

src/Ngino.Server/AuthRateLimiter.cs

@@ -0,0 +1,155 @@
+using System.Collections.Concurrent;
+using ElmahCore;
+
+namespace Ngino.Server;
+
+internal sealed class AuthRateLimiter
+{
+    private const int DecayIntervalMinutes = 144; // ~1 step per 2.4 hours
+
+    private readonly ConcurrentDictionary<string, AuthAttemptInfo> _attempts = new(StringComparer.OrdinalIgnoreCase);
+    private readonly ILogger<AuthRateLimiter> _logger;
+    private readonly ErrorLog _errorLog;
+
+    public AuthRateLimiter(ILogger<AuthRateLimiter> logger, ErrorLog errorLog)
+    {
+        _logger = logger;
+        _errorLog = errorLog;
+    }
+
+    public void RecordFailure(string ipAddress, string endpoint)
+    {
+        var info = _attempts.GetOrAdd(ipAddress, _ => new AuthAttemptInfo());
+
+        lock (info)
+        {
+            info.Count++;
+            info.LastAttemptUtc = DateTime.UtcNow;
+
+            if (info.Count >= 20)
+            {
+                info.BlockedUntilUtc = DateTime.UtcNow.AddHours(48);
+                _logger.LogWarning(
+                    "IP {IpAddress} blocked for 48 hours after {Count} failed auth attempts (last: {Endpoint})",
+                    ipAddress, info.Count, endpoint);
+            }
+            else
+            {
+                _logger.LogWarning(
+                    "Failed auth attempt #{Count} from {IpAddress} on {Endpoint}",
+                    info.Count, ipAddress, endpoint);
+            }
+
+            _errorLog.Log(new Error(new AuthFailureException(ipAddress, endpoint, info.Count)));
+        }
+    }
+
+    public void RecordSuccess(string ipAddress)
+    {
+        if (!_attempts.TryGetValue(ipAddress, out var info))
+            return;
+
+        lock (info)
+        {
+            if (info.Count > 0)
+            {
+                var before = info.Count;
+                info.Count /= 2;
+                info.LastAttemptUtc = DateTime.UtcNow;
+                _logger.LogInformation(
+                    "Auth success from {IpAddress}: count reduced from {Before} to {After}",
+                    ipAddress, before, info.Count);
+            }
+        }
+    }
+
+    public (bool Allowed, TimeSpan? RetryAfter, bool IsBlocked) CheckRateLimit(string ipAddress)
+    {
+        if (!_attempts.TryGetValue(ipAddress, out var info))
+        {
+            return (true, null, false);
+        }
+
+        lock (info)
+        {
+            if (info.BlockedUntilUtc is { } blockedUntil)
+            {
+                if (blockedUntil > DateTime.UtcNow)
+                {
+                    return (false, blockedUntil - DateTime.UtcNow, true);
+                }
+
+                info.Count = 0;
+                info.BlockedUntilUtc = null;
+                info.LastAttemptUtc = DateTime.MinValue;
+                return (true, null, false);
+            }
+
+            if (info.Count > 0)
+            {
+                var elapsed = DateTime.UtcNow - info.LastAttemptUtc;
+                var decayTicks = (int)(elapsed.TotalMinutes / DecayIntervalMinutes);
+                if (decayTicks > 0)
+                {
+                    info.Count = Math.Max(0, info.Count - decayTicks);
+                }
+            }
+
+            var waitTime = CalculateWaitTime(info.Count);
+            if (waitTime is { } wait)
+            {
+                var elapsed = DateTime.UtcNow - info.LastAttemptUtc;
+                if (elapsed < wait)
+                {
+                    return (false, wait - elapsed, false);
+                }
+            }
+
+            return (true, null, false);
+        }
+    }
+
+    public static string GetClientIp(HttpRequest request)
+    {
+        if (request.Headers.TryGetValue("X-Forwarded-For", out var forwardedFor))
+        {
+            var first = forwardedFor.FirstOrDefault();
+            if (!string.IsNullOrWhiteSpace(first))
+            {
+                var commaIndex = first.IndexOf(',');
+                return commaIndex > 0 ? first[..commaIndex].Trim() : first.Trim();
+            }
+        }
+
+        if (request.Headers.TryGetValue("X-Real-IP", out var realIp))
+        {
+            var first = realIp.FirstOrDefault();
+            if (!string.IsNullOrWhiteSpace(first))
+            {
+                return first.Trim();
+            }
+        }
+
+        return request.HttpContext.Connection.RemoteIpAddress?.ToString() ?? "unknown";
+    }
+
+    private static TimeSpan? CalculateWaitTime(int attemptCount) =>
+        attemptCount switch
+        {
+            < 3 => null,
+            < 5 => TimeSpan.FromSeconds(5),
+            < 10 => TimeSpan.FromSeconds(5 + (attemptCount - 5) * 5),
+            < 20 => TimeSpan.FromMinutes(attemptCount - 9),
+            _ => null
+        };
+
+    private sealed class AuthAttemptInfo
+    {
+        public int Count;
+        public DateTime LastAttemptUtc;
+        public DateTime? BlockedUntilUtc;
+    }
+
+    private sealed class AuthFailureException(string ipAddress, string endpoint, int attemptCount)
+        : Exception($"Failed auth attempt #{attemptCount} from {ipAddress} on {endpoint}");
+}

src/Ngino.Server/Data/ApplicationDbContext.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+using Ngino.Server.Models;
+
+namespace Ngino.Server.Data;
+
+internal sealed class ApplicationDbContext : IdentityDbContext<ApplicationUser>
+{
+    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
+        : base(options)
+    {
+    }
+}

src/Ngino.Server/EmbeddingCache.cs

@@ -2,9 +2,9 @@ using System.Collections.Concurrent;
 using System.Text.Json;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.Data.Sqlite;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class EmbeddingCache
 {
@@ -121,7 +121,7 @@ internal sealed class EmbeddingCache
         context.Response.StatusCode = StatusCodes.Status200OK;
         context.Response.ContentType = JsonContentType;
         context.Response.ContentLength = body.Length;
-        context.Response.Headers["X-Reverse-Llama-Embedding-Cache"] = "hit";
+        context.Response.Headers["X-Ngino-Embedding-Cache"] = "hit";
 
         await context.Response.Body.WriteAsync(body, context.RequestAborted);
         return true;

src/Ngino.Server/KeepaliveCoordinator.cs

@@ -0,0 +1,111 @@
+using System.Text.RegularExpressions;
+
+namespace Ngino.Server;
+
+internal static class KeepaliveCoordinator
+{
+    public static IReadOnlyList<KeepaliveAction> PlanActions(
+        IEnumerable<GroupClientInfo> members,
+        IEnumerable<KeepaliveCandidate> candidates)
+    {
+        var actions = new List<KeepaliveAction>();
+        var seen = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var candidateList = candidates.ToList();
+
+        foreach (var member in members)
+        {
+            if (string.IsNullOrWhiteSpace(member.Model))
+            {
+                continue;
+            }
+
+            var policy = member.KeepalivePolicy ?? GroupClientKeepalivePolicy.Default;
+            var targetCount = Math.Max(0, policy.InstancesToKeepAlive);
+            var matching = candidateList
+                .Where(candidate => MatchesMember(candidate.ClientId, member))
+                .ToList();
+
+            if (matching.Count == 0)
+            {
+                continue;
+            }
+
+            var active = matching.Where(candidate => candidate.HasActiveModel).ToList();
+            var activeCount = active.Count;
+
+            if (activeCount < targetCount)
+            {
+                var toLoad = matching
+                    .Where(candidate => !candidate.HasActiveModel && candidate.HasListedModel)
+                    .OrderBy(candidate => candidate.ClientId, StringComparer.OrdinalIgnoreCase)
+                    .Take(targetCount - activeCount);
+
+                foreach (var candidate in toLoad)
+                {
+                    var key = $"{candidate.ClientId}:{member.Model}";
+                    if (seen.Add(key))
+                    {
+                        actions.Add(new KeepaliveAction(candidate.ClientId, "load", member.Model));
+                    }
+                }
+            }
+            else if (activeCount > targetCount)
+            {
+                var toUnload = active
+                    .OrderByDescending(candidate => candidate.ClientId, StringComparer.OrdinalIgnoreCase)
+                    .Skip(targetCount)
+                    .Take(activeCount - targetCount);
+
+                foreach (var candidate in toUnload)
+                {
+                    var key = $"{candidate.ClientId}:{member.Model}";
+                    if (seen.Add(key))
+                    {
+                        actions.Add(new KeepaliveAction(candidate.ClientId, "unload", member.Model));
+                    }
+                }
+            }
+        }
+
+        return actions;
+    }
+
+    private static bool MatchesMember(string clientId, GroupClientInfo member)
+    {
+        if (string.IsNullOrWhiteSpace(member.ClientId)
+            && string.IsNullOrWhiteSpace(member.ClientPattern))
+        {
+            return true;
+        }
+
+        if (!string.IsNullOrWhiteSpace(member.ClientId)
+            && string.Equals(clientId, member.ClientId, StringComparison.OrdinalIgnoreCase))
+        {
+            return true;
+        }
+
+        if (string.IsNullOrWhiteSpace(member.ClientPattern))
+        {
+            return false;
+        }
+
+        try
+        {
+            return Regex.IsMatch(clientId, member.ClientPattern, RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        }
+        catch (RegexParseException)
+        {
+            return false;
+        }
+    }
+}
+
+internal sealed record KeepaliveCandidate(
+    string ClientId,
+    bool HasListedModel,
+    bool HasActiveModel);
+
+internal sealed record KeepaliveAction(
+    string ClientId,
+    string Command,
+    string Model);

src/Ngino.Server/KeepaliveService.cs

@@ -0,0 +1,125 @@
+namespace Ngino.Server;
+
+internal sealed class KeepaliveService : BackgroundService
+{
+    private static readonly TimeSpan CheckInterval = TimeSpan.FromSeconds(10);
+    private static readonly TimeSpan CommandTimeout = TimeSpan.FromSeconds(30);
+
+    private readonly TunnelHub _hub;
+    private readonly ManagementStore _managementStore;
+    private readonly ILogger<KeepaliveService> _logger;
+
+    public KeepaliveService(TunnelHub hub, ManagementStore managementStore, ILogger<KeepaliveService> logger)
+    {
+        _hub = hub;
+        _managementStore = managementStore;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await ApplyKeepaliveAsync(stoppingToken);
+            }
+            catch (Exception exception)
+            {
+                _logger.LogWarning(exception, "Keepalive cycle failed.");
+            }
+
+            await Task.Delay(CheckInterval, stoppingToken);
+        }
+    }
+
+    private async Task ApplyKeepaliveAsync(CancellationToken cancellationToken)
+    {
+        var members = _managementStore.ListAllGroupClients();
+        if (members.Count == 0)
+        {
+            return;
+        }
+
+        var snapshots = _hub.ClientSnapshots;
+        if (snapshots.Count == 0)
+        {
+            return;
+        }
+
+        foreach (var member in members)
+        {
+            if (string.IsNullOrWhiteSpace(member.Model))
+            {
+                continue;
+            }
+
+            var matchingCandidates = snapshots
+                .Select(snapshot => new KeepaliveCandidate(
+                    snapshot.Id,
+                    HasModel(snapshot.Models, member.Model),
+                    HasModel(snapshot.ActiveModels, member.Model)))
+                .ToList();
+
+            var actions = KeepaliveCoordinator.PlanActions([member], matchingCandidates);
+            foreach (var action in actions)
+            {
+                try
+                {
+                    var connection = _hub.Get(action.ClientId);
+                    if (connection is null)
+                    {
+                        continue;
+                    }
+
+                    var response = await connection.SendModelCommandAsync(
+                        action.Command,
+                        action.Model,
+                        payloadJson: null,
+                        CommandTimeout,
+                        cancellationToken);
+
+                    if (response.StatusCode is < 200 or >= 300)
+                    {
+                        _logger.LogWarning(
+                            "Keepalive {Command} for model {Model} on client {ClientId} returned HTTP {StatusCode}.",
+                            action.Command,
+                            action.Model,
+                            action.ClientId,
+                            response.StatusCode);
+                    }
+                }
+                catch (Exception exception)
+                {
+                    _logger.LogWarning(exception,
+                        "Keepalive {Command} for model {Model} on client {ClientId} failed.",
+                        action.Command,
+                        action.Model,
+                        action.ClientId);
+                }
+            }
+        }
+    }
+
+    private static bool HasModel(IEnumerable<string> models, string requestedModel)
+    {
+        if (string.IsNullOrWhiteSpace(requestedModel))
+        {
+            return false;
+        }
+
+        var requested = requestedModel.Trim();
+        return models.Any(model => ModelNamesMatch(requested, model));
+    }
+
+    private static bool ModelNamesMatch(string requested, string available)
+    {
+        return string.Equals(requested, available, StringComparison.OrdinalIgnoreCase)
+            || string.Equals(StripLatestTag(requested), StripLatestTag(available), StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static string StripLatestTag(string model) =>
+        model.EndsWith(":latest", StringComparison.OrdinalIgnoreCase)
+            ? model[..^":latest".Length]
+            : model;
+}

src/Ngino.Server/Models/ApplicationUser.cs

@@ -0,0 +1,7 @@
+using Microsoft.AspNetCore.Identity;
+
+namespace Ngino.Server.Models;
+
+internal sealed class ApplicationUser : IdentityUser
+{
+}

src/Ngino.Server/Ngino.Server.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <ItemGroup>
+    <PackageReference Include="ElmahCore" Version="2.1.2" />
+    <PackageReference Include="ElmahCore.MySql" Version="2.1.2" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="10.0.10" />
+    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="10.0.10" />
+    <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.10" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.10" />
+    <PackageReference Include="SSH.NET" Version="2024.1.0" />
+    <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="3.0.5" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.9.1" />
+    <PackageReference Include="System.Drawing.Common" Version="9.0.0" />
+    <PackageReference Include="System.Text.Encodings.Web" Version="10.0.10" />
+    <PackageReference Include="System.Text.Json" Version="10.0.10" />
+    <ProjectReference Include="..\Ngino.Protocol\Ngino.Protocol.csproj" />
+    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+      <_Parameter1>Ngino.Client.Tests</_Parameter1>
+    </AssemblyAttribute>
+  </ItemGroup>
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>01c17520-a17c-43ae-b5e1-1fe435a232aa</UserSecretsId>
+  </PropertyGroup>
+
+</Project>

src/Ngino.Server/PendingCommand.cs

@@ -1,6 +1,6 @@
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class PendingCommand
 {

src/Ngino.Server/PendingProxyRequest.cs

@@ -1,7 +1,7 @@
 using System.Threading.Channels;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class PendingProxyRequest
 {

src/Ngino.Server/Program.cs

@@ -0,0 +1,345 @@
+using System.Data.SqlClient;
+using System.Net.WebSockets;
+using ElmahCore;
+using ElmahCore.Mvc;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.IdentityModel.Protocols.OpenIdConnect;
+using Ngino.Protocol;
+using Ngino.Server;
+using Ngino.Server.Data;
+using Ngino.Server.Models;
+
+var builder = WebApplication.CreateBuilder(args);
+var settings = ServerSettings.FromConfiguration(builder.Configuration);
+
+builder.Services.AddSingleton(settings);
+builder.Services.AddSingleton<TunnelHub>();
+builder.Services.AddSingleton<EmbeddingCache>();
+builder.Services.AddSingleton<ManagementStore>();
+builder.Services.AddSingleton<AuthRateLimiter>();
+builder.Services.AddHostedService<KeepaliveService>();
+builder.Services.AddElmah<ElmahCore.MySql.MySqlErrorLog>().Configure<ElmahOptions>(
+    options => options.ConnectionString = builder.Configuration.GetConnectionString("ElmahConnection"));
+
+if (settings.Keycloak.IsConfigured)
+{
+    builder.Services
+        .AddAuthentication(options =>
+        {
+            options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
+            options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
+        })
+        .AddCookie(options =>
+        {
+            options.Cookie.Name = "Ngino.Admin";
+            options.Cookie.SameSite = SameSiteMode.Lax;
+            options.Cookie.SecurePolicy = settings.SecureCookies ? CookieSecurePolicy.Always : CookieSecurePolicy.None;
+            options.LoginPath = "/admin/login";
+            options.LogoutPath = "/admin/logout";
+        })
+        .AddOpenIdConnect(options =>
+        {
+            options.Authority = settings.Keycloak.Authority;
+            options.ClientId = settings.Keycloak.ClientId;
+            options.ClientSecret = settings.Keycloak.ClientSecret;
+            options.RequireHttpsMetadata = settings.Keycloak.RequireHttpsMetadata;
+            options.ResponseType = OpenIdConnectResponseType.Code;
+            options.ResponseMode = OpenIdConnectResponseMode.Query;
+            options.SaveTokens = true;
+            options.GetClaimsFromUserInfoEndpoint = true;
+            options.CorrelationCookie.SameSite = SameSiteMode.Lax;
+            options.CorrelationCookie.SecurePolicy = settings.SecureCookies ? CookieSecurePolicy.Always : CookieSecurePolicy.None;
+            options.NonceCookie.SameSite = SameSiteMode.Lax;
+            options.NonceCookie.SecurePolicy = settings.SecureCookies ? CookieSecurePolicy.Always : CookieSecurePolicy.None;
+            options.Scope.Clear();
+            options.Scope.Add("openid");
+            options.Scope.Add("profile");
+            options.Scope.Add("email");
+            options.Events = new OpenIdConnectEvents
+            {
+                OnRemoteFailure = context =>
+                {
+                    var errorLog = context.HttpContext.RequestServices.GetService<ErrorLog>();
+                    if (context.Failure is not null)
+                    {
+                        errorLog?.Log(new Error(context.Failure));
+                    }
+
+                    context.HandleResponse();
+                    context.Response.Redirect("/admin/auth-error");
+                    return Task.CompletedTask;
+                }
+            };
+    });
+}
+
+if (!settings.Keycloak.IsConfigured)
+{
+    var identityDbPath = Path.Combine(AppContext.BaseDirectory, "App_Data", "identity.sqlite");
+    var identityConnectionString = new Microsoft.Data.Sqlite.SqliteConnectionStringBuilder
+    {
+        DataSource = identityDbPath,
+        Mode = Microsoft.Data.Sqlite.SqliteOpenMode.ReadWriteCreate
+    }.ToString();
+
+    builder.Services.AddDbContext<ApplicationDbContext>(options =>
+        options.UseSqlite(identityConnectionString));
+
+    builder.Services
+        .AddIdentity<ApplicationUser, IdentityRole>(options =>
+        {
+            options.Password.RequireDigit = true;
+            options.Password.RequireLowercase = true;
+            options.Password.RequireUppercase = true;
+            options.Password.RequireNonAlphanumeric = false;
+            options.Password.RequiredLength = 8;
+            options.User.RequireUniqueEmail = true;
+            options.SignIn.RequireConfirmedAccount = false;
+        })
+        .AddEntityFrameworkStores<ApplicationDbContext>()
+        .AddDefaultTokenProviders();
+
+    builder.Services.ConfigureApplicationCookie(options =>
+    {
+        options.Cookie.Name = "Ngino.Admin";
+        options.Cookie.SameSite = SameSiteMode.Lax;
+        options.Cookie.SecurePolicy = settings.SecureCookies ? CookieSecurePolicy.Always : CookieSecurePolicy.None;
+        options.LoginPath = "/admin/login";
+        options.LogoutPath = "/admin/logout";
+        options.AccessDeniedPath = "/admin/login";
+    });
+}
+
+builder.Services.AddAntiforgery();
+builder.Services.AddAuthorization();
+
+builder.Services.AddCors(options =>
+{
+    options.AddDefaultPolicy(policy =>
+    {
+        if (settings.Cors.AllowedOrigins.Contains("*"))
+        {
+            policy.AllowAnyOrigin();
+        }
+        else
+        {
+            policy.WithOrigins(settings.Cors.AllowedOrigins);
+        }
+
+        if (settings.Cors.AllowedMethods.Contains("*"))
+        {
+            policy.AllowAnyMethod();
+        }
+        else
+        {
+            policy.WithMethods(settings.Cors.AllowedMethods);
+        }
+
+        if (settings.Cors.AllowedHeaders.Contains("*"))
+        {
+            policy.AllowAnyHeader();
+        }
+        else
+        {
+            policy.WithHeaders(settings.Cors.AllowedHeaders);
+        }
+
+        if (settings.Cors.AllowCredentials)
+        {
+            policy.AllowCredentials();
+        }
+    });
+});
+
+var app = builder.Build();
+
+var managementStore = app.Services.GetRequiredService<ManagementStore>();
+var tunnelHub = app.Services.GetRequiredService<TunnelHub>();
+managementStore.SetConnectedClientProvider(() => tunnelHub.ClientSnapshots.Select(c => c.Id));
+
+app.UseCors();
+
+if (settings.Keycloak.IsConfigured)
+{
+    app.UseAuthentication();
+    app.UseAuthorization();
+}
+
+if (!settings.Keycloak.IsConfigured)
+{
+    using var scope = app.Services.CreateScope();
+    var dbContext = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+    dbContext.Database.EnsureCreated();
+
+    app.UseAuthentication();
+    app.UseAuthorization();
+}
+
+app.UseAntiforgery();
+
+app.UseElmah();
+
+app.Use(async (context, next) =>
+{
+    context.Response.Headers.XFrameOptions = "DENY";
+    context.Response.Headers.ContentSecurityPolicy = "frame-ancestors 'none'";
+    await next();
+});
+
+var rateLimiter = app.Services.GetRequiredService<AuthRateLimiter>();
+
+app.Use(async (context, next) =>
+{
+    if (HttpMethods.IsOptions(context.Request.Method))
+    {
+        await next();
+        return;
+    }
+
+    var ip = AuthRateLimiter.GetClientIp(context.Request);
+    var (allowed, retryAfter, _) = rateLimiter.CheckRateLimit(ip);
+
+    if (!allowed)
+    {
+        context.Response.StatusCode = StatusCodes.Status429TooManyRequests;
+        context.Response.Headers.RetryAfter = ((int)retryAfter!.Value.TotalSeconds).ToString();
+        context.Response.ContentType = "application/json";
+        var seconds = (int)retryAfter!.Value.TotalSeconds;
+        string retryMessage;
+        if (seconds >= 3600)
+        {
+            var hours = seconds / 3600;
+            retryMessage = $"Please try again in {hours} hour{(hours == 1 ? "" : "s")}.";
+        }
+        else if (seconds >= 60)
+        {
+            var minutes = seconds / 60;
+            retryMessage = $"Please try again in {minutes} minute{(minutes == 1 ? "" : "s")}.";
+        }
+        else
+        {
+            retryMessage = $"Please try again in {seconds} second{(seconds == 1 ? "" : "s")}.";
+        }
+        await context.Response.WriteAsJsonAsync(new { error = $"Too many requests. {retryMessage}" }, context.RequestAborted);
+        return;
+    }
+
+    context.Response.OnStarting(() =>
+    {
+        if (context.Response.StatusCode is StatusCodes.Status401Unauthorized)
+        {
+            rateLimiter.RecordFailure(ip, context.Request.Path);
+        }
+        else if (context.Response.StatusCode is StatusCodes.Status302Found
+            && context.Request.Path.StartsWithSegments("/api/admin"))
+        {
+            var location = context.Response.Headers.Location.FirstOrDefault();
+            if (location is not null
+                && location.Contains("/admin/login", StringComparison.OrdinalIgnoreCase))
+            {
+                rateLimiter.RecordFailure(ip, context.Request.Path);
+            }
+            else if (location is not null
+                && location.StartsWith("/admin", StringComparison.OrdinalIgnoreCase))
+            {
+                rateLimiter.RecordSuccess(ip);
+            }
+        }
+        else if (context.Response.StatusCode is >= 200 and < 300
+            && context.Request.Path.StartsWithSegments("/api/admin"))
+        {
+            rateLimiter.RecordSuccess(ip);
+        }
+
+        return Task.CompletedTask;
+    });
+
+    await next();
+});
+
+app.UseWebSockets(new WebSocketOptions
+{
+    KeepAliveInterval = TimeSpan.FromSeconds(30)
+});
+
+app.UseStaticFiles();
+
+app.MapAdminEndpoints(settings);
+
+app.MapGet("/favicon.ico", () =>
+    Results.File(
+        Path.Combine(app.Environment.WebRootPath, "favicon.ico"),
+        "image/x-icon"));
+
+app.MapGet("/", () => Results.Redirect("/admin"));
+
+app.MapGet(settings.StatusPath, (HttpContext context, TunnelHub hub, ServerSettings serverSettings, EmbeddingCache embeddingCache, ManagementStore managementStore) =>
+{
+    // Query token allowed so the status page can be checked in a browser.
+    if (!TokenAuthentication.IsAuthorized(context.Request, serverSettings, managementStore, allowQueryToken: true))
+    {
+        return Results.Unauthorized();
+    }
+
+    return Results.Json(new
+    {
+        connected = hub.HasClient,
+        pendingRequests = hub.PendingRequestCount,
+        tunnelPath = serverSettings.TunnelPath,
+        embeddingCache = new
+        {
+            available = embeddingCache.IsAvailable,
+            count = embeddingCache.Count
+        },
+        management = new
+        {
+            available = managementStore.IsAvailable
+        },
+        clients = hub.ClientsSnapshot
+    });
+});
+
+app.Map(settings.TunnelPath, async (HttpContext context, TunnelHub hub, ServerSettings serverSettings, ManagementStore managementStore) =>
+{
+    if (!TokenAuthentication.IsClientAuthorized(context.Request, serverSettings, managementStore, allowQueryToken: true))
+    {
+        context.Response.StatusCode = StatusCodes.Status401Unauthorized;
+        await context.Response.WriteAsync($"Missing or invalid {ProtocolConstants.TokenHeader}.", context.RequestAborted);
+        return;
+    }
+
+    if (!context.WebSockets.IsWebSocketRequest)
+    {
+        context.Response.StatusCode = StatusCodes.Status400BadRequest;
+        await context.Response.WriteAsync("This endpoint only accepts WebSocket tunnel connections.", context.RequestAborted);
+        return;
+    }
+
+    var clientId = context.Request.Headers[ProtocolConstants.ClientIdHeader].FirstOrDefault();
+    if (string.IsNullOrWhiteSpace(clientId))
+    {
+        clientId = $"anonymous-{Guid.NewGuid():n}";
+    }
+
+    using var socket = await context.WebSockets.AcceptWebSocketAsync();
+    await hub.AcceptAsync(clientId, socket, context.RequestAborted);
+});
+
+app.Map("/clients/{clientId}/{**path}", ReverseProxyEndpoint.HandleClientAsync);
+
+app.Map("/{**path}", ReverseProxyEndpoint.HandleRootAsync)
+    .WithOrder(1000);
+
+var elmahService = app.Services.GetRequiredService<ErrorLog>();
+try
+{
+    app.Run();
+}
+catch (Exception exception)
+{
+    elmahService.Log(new Error(exception));
+    throw;
+}

src/Ngino.Server/ResponseTokenCounter.cs

@@ -1,7 +1,7 @@
 using System.Text;
 using System.Text.Json;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class ResponseTokenCounter
 {
@@ -21,15 +21,16 @@ internal sealed class ResponseTokenCounter
         _buffer.Write(chunk[..length]);
     }
 
-    public int CountTokens()
+    public TokenCounts CountTokens()
     {
         if (_buffer.Length == 0)
         {
-            return 0;
+            return new TokenCounts(0, 0, 0);
         }
 
         var payload = Encoding.UTF8.GetString(_buffer.ToArray());
-        var total = 0;
+        var totalPrompt = 0;
+        var totalCompletion = 0;
         var parsedLines = false;
 
         foreach (var rawLine in payload.Split('\n'))
@@ -50,30 +51,37 @@ internal sealed class ResponseTokenCounter
                 continue;
             }
 
-            if (TryExtractFromJson(line, out var lineTokens))
+            if (TryExtractTokenCountsFromJson(line, out var prompt, out var completion))
             {
                 parsedLines = true;
-                total += lineTokens;
+                totalPrompt += prompt;
+                totalCompletion += completion;
             }
         }
 
         if (parsedLines)
         {
-            return total;
+            return new TokenCounts(totalPrompt, totalCompletion, totalPrompt + totalCompletion);
         }
 
-        return TryExtractFromJson(payload, out var tokens) ? tokens : 0;
+        if (TryExtractTokenCountsFromJson(payload, out var promptFallback, out var completionFallback))
+        {
+            return new TokenCounts(promptFallback, completionFallback, promptFallback + completionFallback);
+        }
+
+        return new TokenCounts(0, 0, 0);
     }
 
-    private static bool TryExtractFromJson(string json, out int tokens)
+    private static bool TryExtractTokenCountsFromJson(string json, out int promptTokens, out int completionTokens)
     {
-        tokens = 0;
+        promptTokens = 0;
+        completionTokens = 0;
 
         try
         {
             using var document = JsonDocument.Parse(json);
-            tokens = ExtractTokens(document.RootElement);
+            ExtractTokenCounts(document.RootElement, out promptTokens, out completionTokens);
-            return tokens > 0;
+            return promptTokens > 0 || completionTokens > 0;
         }
         catch (JsonException)
         {
@@ -81,70 +89,68 @@ internal sealed class ResponseTokenCounter
         }
     }
 
-    private static int ExtractTokens(JsonElement element)
+    private static void ExtractTokenCounts(JsonElement element, out int promptTokens, out int completionTokens)
     {
+        promptTokens = 0;
+        completionTokens = 0;
+
         if (element.ValueKind == JsonValueKind.Array)
         {
-            var total = 0;
             foreach (var item in element.EnumerateArray())
             {
-                total += ExtractTokens(item);
+                ExtractTokenCounts(item, out var itemPrompt, out var itemCompletion);
+                promptTokens += itemPrompt;
+                completionTokens += itemCompletion;
             }
 
-            return total;
+            return;
         }
 
         if (element.ValueKind != JsonValueKind.Object)
         {
-            return 0;
+            return;
         }
 
         if (element.TryGetProperty("usage", out var usage) && usage.ValueKind == JsonValueKind.Object)
         {
-            if (TryGetInt(usage, "total_tokens", out var totalTokens))
+            if (TryGetInt(usage, "prompt_tokens", out var pt))
             {
-                return totalTokens;
+                promptTokens += pt;
             }
 
-            var usageTotal = 0;
+            if (TryGetInt(usage, "completion_tokens", out var ct))
-            if (TryGetInt(usage, "prompt_tokens", out var promptTokens))
             {
-                usageTotal += promptTokens;
+                completionTokens += ct;
             }
 
-            if (TryGetInt(usage, "completion_tokens", out var completionTokens))
+            if (promptTokens == 0 && completionTokens == 0)
             {
-                usageTotal += completionTokens;
+                if (TryGetInt(usage, "input_tokens", out var it))
+                {
+                    promptTokens += it;
+                }
+
+                if (TryGetInt(usage, "output_tokens", out var ot))
+                {
+                    completionTokens += ot;
+                }
             }
 
-            if (TryGetInt(usage, "input_tokens", out var inputTokens))
+            if (promptTokens > 0 || completionTokens > 0)
             {
-                usageTotal += inputTokens;
+                return;
-            }
-
-            if (TryGetInt(usage, "output_tokens", out var outputTokens))
-            {
-                usageTotal += outputTokens;
-            }
-
-            if (usageTotal > 0)
-            {
-                return usageTotal;
             }
         }
 
-        var ollamaTotal = 0;
+        if (TryGetInt(element, "prompt_eval_count", out var promptEval))
-        if (TryGetInt(element, "prompt_eval_count", out var promptEvalCount))
         {
-            ollamaTotal += promptEvalCount;
+            promptTokens += promptEval;
         }
 
-        if (TryGetInt(element, "eval_count", out var evalCount))
+        if (TryGetInt(element, "eval_count", out var eval))
         {
-            ollamaTotal += evalCount;
+            completionTokens += eval;
         }
-
-        return ollamaTotal;
     }
 
     private static bool TryGetInt(JsonElement element, string propertyName, out int value)
@@ -155,3 +161,5 @@ internal sealed class ResponseTokenCounter
             && property.TryGetInt32(out value);
     }
 }
+
+internal sealed record TokenCounts(int PromptTokens, int CompletionTokens, int TotalTokens);

src/Ngino.Server/ReverseProxyEndpoint.cs

@@ -1,13 +1,16 @@
 using System.Text.Json;
+using ElmahCore;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.Extensions.Primitives;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal static class ReverseProxyEndpoint
 {
-    private const string UnauthorizedMessage = "Missing or invalid ReverseLlama token.";
+    private const string UnauthorizedMessage = "Missing or invalid Ngino token.";
+
+    private const string OllamaVersion = "0.32.5";
 
     private static readonly HashSet<string> HopByHopHeaders = new(StringComparer.OrdinalIgnoreCase)
     {
@@ -43,7 +46,21 @@ internal static class ReverseProxyEndpoint
             return;
         }
 
-        var groupAccess = ResolveGroupAccess(auth.ApiKeyId, managementStore);
+        var billingCheck = managementStore.CheckBalanceForUserKey(auth.UserKeyId);
+        if (!billingCheck.Allowed)
+        {
+            context.Response.StatusCode = StatusCodes.Status402PaymentRequired;
+            await context.Response.WriteAsJsonAsync(new
+            {
+                error = "Insufficient balance.",
+                balance = billingCheck.Balance,
+                currency = billingCheck.Currency,
+                threshold = billingCheck.Threshold
+            }, context.RequestAborted);
+            return;
+        }
+
+        var groupAccess = ResolveGroupAccess(auth.UserKeyId, managementStore);
 
         var pathTokenRemoved = TokenAuthentication.TryRemovePathToken(context.Request.Path, settings, managementStore, out var proxyPath);
         if (!pathTokenRemoved)
@@ -57,6 +74,12 @@ internal static class ReverseProxyEndpoint
             return;
         }
 
+        if (IsVersionRequest(context.Request, proxyPath))
+        {
+            await WriteVersionResponseAsync(context);
+            return;
+        }
+
         if (TryGetClientAddress(proxyPath, out var pathClientId, out var clientPath))
         {
             if (!groupAccess.IsClientAllowed(pathClientId))
@@ -76,7 +99,8 @@ internal static class ReverseProxyEndpoint
                 loggerFactory,
                 embeddingCache,
                 managementStore,
-                groupAccess);
+                groupAccess,
+                auth.UserKeyId);
             return;
         }
 
@@ -124,7 +148,8 @@ internal static class ReverseProxyEndpoint
             loggerFactory,
             embeddingCache,
             embeddingRequest,
-            managementStore);
+            managementStore,
+            auth.UserKeyId);
     }
 
     public static async Task HandleClientAsync(
@@ -145,7 +170,21 @@ internal static class ReverseProxyEndpoint
             return;
         }
 
-        var groupAccess = ResolveGroupAccess(auth.ApiKeyId, managementStore);
+        var billingCheck = managementStore.CheckBalanceForUserKey(auth.UserKeyId);
+        if (!billingCheck.Allowed)
+        {
+            context.Response.StatusCode = StatusCodes.Status402PaymentRequired;
+            await context.Response.WriteAsJsonAsync(new
+            {
+                error = "Insufficient balance.",
+                balance = billingCheck.Balance,
+                currency = billingCheck.Currency,
+                threshold = billingCheck.Threshold
+            }, context.RequestAborted);
+            return;
+        }
+
+        var groupAccess = ResolveGroupAccess(auth.UserKeyId, managementStore);
         if (!groupAccess.IsClientAllowed(clientId))
         {
             context.Response.StatusCode = StatusCodes.Status403Forbidden;
@@ -165,7 +204,8 @@ internal static class ReverseProxyEndpoint
             loggerFactory,
             embeddingCache,
             managementStore,
-            groupAccess);
+            groupAccess,
+            auth.UserKeyId);
     }
 
     private static async Task ForwardToClientAsync(
@@ -178,7 +218,8 @@ internal static class ReverseProxyEndpoint
         ILoggerFactory loggerFactory,
         EmbeddingCache embeddingCache,
         ManagementStore managementStore,
-        GroupAccess? groupAccess = null)
+        GroupAccess? groupAccess = null,
+        string? userKeyId = null)
     {
         var clientAccess = managementStore.GetClientAccess(clientId);
         if (clientAccess.IsDisabled)
@@ -220,7 +261,8 @@ internal static class ReverseProxyEndpoint
             loggerFactory,
             embeddingCache,
             embeddingRequest,
-            managementStore);
+            managementStore,
+            userKeyId);
     }
 
     private static bool IsRootPath(PathString path) =>
@@ -269,20 +311,29 @@ internal static class ReverseProxyEndpoint
         return true;
     }
 
-    private static GroupAccess ResolveGroupAccess(string? apiKeyId, ManagementStore managementStore)
+    private static GroupAccess ResolveGroupAccess(string? userKeyId, ManagementStore managementStore)
     {
-        if (string.IsNullOrWhiteSpace(apiKeyId))
+        if (string.IsNullOrWhiteSpace(userKeyId))
         {
             return GroupAccess.Unrestricted;
         }
 
-        return managementStore.ResolveGroupAccess(apiKeyId);
+        return managementStore.ResolveGroupAccess(userKeyId);
     }
 
     private static bool IsTagsRequest(HttpRequest request, PathString proxyPath) =>
         HttpMethods.IsGet(request.Method)
         && string.Equals(proxyPath.Value, "/api/tags", StringComparison.OrdinalIgnoreCase);
 
+    private static bool IsVersionRequest(HttpRequest request, PathString proxyPath) =>
+        HttpMethods.IsGet(request.Method)
+        && string.Equals(proxyPath.Value, "/api/version", StringComparison.OrdinalIgnoreCase);
+
+    private static Task WriteVersionResponseAsync(HttpContext context) =>
+        context.Response.WriteAsJsonAsync(
+            new { version = OllamaVersion },
+            context.RequestAborted);
+
     private static async Task HandleTagsAsync(
         HttpContext context,
         TunnelHub hub,
@@ -339,14 +390,26 @@ internal static class ReverseProxyEndpoint
 
     private static string GetClientDisabledMessage(string clientId, ClientAccess access)
     {
+        var reason = string.IsNullOrWhiteSpace(access.DisabledReason)
+            ? ""
+            : $" Reason: {access.DisabledReason.Trim()}.";
+
         if (access.DisabledManually)
         {
-            return $"Tunnel client '{clientId}' is disabled until it is enabled manually.";
+            return $"Tunnel client '{clientId}' is disabled until it is enabled manually.{reason}";
         }
 
-        return access.DisabledUntilUtc is { } disabledUntil
+        if (access.DisabledUntilUtc is { } disabledUntil)
-            ? $"Tunnel client '{clientId}' is disabled until {disabledUntil:O}."
+        {
-            : $"Tunnel client '{clientId}' is disabled.";
+            var from = access.DisabledFromUtc is { } fromUtc
+                ? $" (scheduled from {fromUtc:O})"
+                : "";
+            return $"Tunnel client '{clientId}' is disabled until {disabledUntil:O}.{from}{reason}";
+        }
+
+        return access.DisabledFromUtc is { } fromUtc2
+            ? $"Tunnel client '{clientId}' is disabled (scheduled from {fromUtc2:O}).{reason}"
+            : $"Tunnel client '{clientId}' is disabled.{reason}";
     }
 
     private static async Task<string?> GetRequestedModelAsync(HttpRequest request, PathString proxyPath)
@@ -464,9 +527,10 @@ internal static class ReverseProxyEndpoint
         ILoggerFactory loggerFactory,
         EmbeddingCache embeddingCache,
         EmbeddingCacheRequest? embeddingRequest,
-        ManagementStore managementStore)
+        ManagementStore managementStore,
+        string? userKeyId = null)
     {
-        var logger = loggerFactory.CreateLogger("ReverseLlama.Server.ReverseProxy");
+        var logger = loggerFactory.CreateLogger("Ngino.Server.ReverseProxy");
         var requestId = Guid.NewGuid().ToString("n");
         var pending = connection.RegisterPending(requestId);
         var startedAt = DateTimeOffset.UtcNow;
@@ -488,6 +552,12 @@ internal static class ReverseProxyEndpoint
                 Headers = CollectRequestHeaders(context.Request, settings, managementStore)
             };
 
+            if (!string.IsNullOrWhiteSpace(requestedModel))
+            {
+                requestMessage.Headers ??= [];
+                requestMessage.Headers.Add(new HeaderPair(ProtocolConstants.ModelHeader, requestedModel));
+            }
+
             await connection.SendAsync(requestMessage, context.RequestAborted);
             requestBodyTask = ForwardRequestBodyAsync(context.Request, connection, requestId, hasBody, settings, logger);
             _ = requestBodyTask.ContinueWith(
@@ -535,10 +605,16 @@ internal static class ReverseProxyEndpoint
         {
             logger.LogWarning(exception, "Proxy request {RequestId} failed.", requestId);
 
+            var errorLog = context.RequestServices.GetService<ErrorLog>();
+            if (errorLog is not null)
+            {
+                await errorLog.LogAsync(new Error(exception, context));
+            }
+
             if (!context.Response.HasStarted)
             {
                 context.Response.StatusCode = StatusCodes.Status502BadGateway;
-                await context.Response.WriteAsync(exception.Message, CancellationToken.None);
+                await context.Response.WriteAsync("Bad gateway", CancellationToken.None);
             }
             else
             {
@@ -549,13 +625,29 @@ internal static class ReverseProxyEndpoint
         {
             connection.RemovePending(requestId);
             var completedAt = DateTimeOffset.UtcNow;
+            var tokenCounts = tokenCounter.CountTokens();
+
+            var cost = 0.0;
+            if (!string.IsNullOrWhiteSpace(userKeyId) && tokenCounts.TotalTokens > 0)
+            {
+                var billing = managementStore.ResolveBillingForUserKey(userKeyId);
+                if (billing is not null)
+                {
+                    cost = managementStore.CalculateCost(billing.GroupId, requestedModel, tokenCounts.TotalTokens);
+                }
+            }
+
             managementStore.RecordRequest(new RequestMetric(
                 connection.ClientId,
                 requestedModel,
                 context.Request.Method,
                 pathAndQuery,
                 statusCode ?? (context.Response.HasStarted ? context.Response.StatusCode : null),
-                tokenCounter.CountTokens(),
+                tokenCounts.PromptTokens,
+                tokenCounts.CompletionTokens,
+                tokenCounts.TotalTokens,
+                userKeyId,
+                cost,
                 startedAt,
                 completedAt,
                 completedAt - startedAt));

src/Ngino.Server/ServerSettings.cs

@@ -1,7 +1,7 @@
 using Microsoft.Extensions.Configuration;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class ServerSettings
 {
@@ -11,42 +11,57 @@ internal sealed class ServerSettings
 
     public string? Token { get; init; }
 
+    public string? ClientToken { get; init; }
+
     public int ChunkSize { get; init; } = 64 * 1024;
 
     public string? EmbeddingCachePath { get; init; }
 
     public string? ManagementDatabasePath { get; init; }
 
+    public bool SecureCookies { get; init; } = true;
+
     public KeycloakSettings Keycloak { get; init; } = new();
 
+    public CorsSettings Cors { get; init; } = new();
+
     public static ServerSettings FromConfiguration(IConfiguration configuration)
     {
         return new ServerSettings
         {
-            StatusPath = NormalizePath(Read(configuration, "ReverseLlama:StatusPath", "status-path") ?? ProtocolConstants.DefaultStatusPath),
+            StatusPath = NormalizePath(Read(configuration, "Ngino:StatusPath", "status-path") ?? ProtocolConstants.DefaultStatusPath),
-            TunnelPath = NormalizePath(Read(configuration, "ReverseLlama:TunnelPath", "tunnel-path") ?? ProtocolConstants.DefaultTunnelPath),
+            TunnelPath = NormalizePath(Read(configuration, "Ngino:TunnelPath", "tunnel-path") ?? ProtocolConstants.DefaultTunnelPath),
-            Token = Read(configuration, "ReverseLlama:Token", "token") ?? Environment.GetEnvironmentVariable("REVERSE_LLAMA_TOKEN"),
+            Token = Read(configuration, "Ngino:Token", "token") ?? Environment.GetEnvironmentVariable("NGINO_TOKEN"),
-            ChunkSize = ReadInt(configuration, 64 * 1024, "ReverseLlama:ChunkSize", "chunk-size", "REVERSE_LLAMA_CHUNK_SIZE"),
+            ClientToken = Read(configuration, "Ngino:ClientToken", "client-token") ?? Environment.GetEnvironmentVariable("NGINO_CLIENT_TOKEN"),
+            ChunkSize = ReadInt(configuration, 64 * 1024, "Ngino:ChunkSize", "chunk-size", "NGINO_CHUNK_SIZE"),
             EmbeddingCachePath = Read(
                 configuration,
-                "ReverseLlama:EmbeddingCachePath",
+                "Ngino:EmbeddingCachePath",
                 "embedding-cache-path",
-                "REVERSE_LLAMA_EMBEDDING_CACHE_PATH"),
+                "NGINO_EMBEDDING_CACHE_PATH"),
             ManagementDatabasePath = Read(
                 configuration,
-                "ReverseLlama:ManagementDatabasePath",
+                "Ngino:ManagementDatabasePath",
                 "management-database-path",
-                "REVERSE_LLAMA_MANAGEMENT_DATABASE_PATH"),
+                "NGINO_MANAGEMENT_DATABASE_PATH"),
+            SecureCookies = ReadBool(configuration, true, "Ngino:SecureCookies", "secure-cookies", "NGINO_SECURE_COOKIES"),
             Keycloak = new KeycloakSettings
             {
-                Authority = Read(configuration, "Authentication:Keycloak:Authority", "REVERSE_LLAMA_KEYCLOAK_AUTHORITY"),
+                Authority = Read(configuration, "Authentication:Keycloak:Authority", "NGINO_KEYCLOAK_AUTHORITY"),
-                ClientId = Read(configuration, "Authentication:Keycloak:ClientId", "REVERSE_LLAMA_KEYCLOAK_CLIENT_ID"),
+                ClientId = Read(configuration, "Authentication:Keycloak:ClientId", "NGINO_KEYCLOAK_CLIENT_ID"),
-                ClientSecret = Read(configuration, "Authentication:Keycloak:ClientSecret", "REVERSE_LLAMA_KEYCLOAK_CLIENT_SECRET"),
+                ClientSecret = Read(configuration, "Authentication:Keycloak:ClientSecret", "NGINO_KEYCLOAK_CLIENT_SECRET"),
                 RequireHttpsMetadata = ReadBool(
                     configuration,
                     true,
                     "Authentication:Keycloak:RequireHttpsMetadata",
-                    "REVERSE_LLAMA_KEYCLOAK_REQUIRE_HTTPS_METADATA")
+                    "NGINO_KEYCLOAK_REQUIRE_HTTPS_METADATA")
+            },
+            Cors = new CorsSettings
+            {
+                AllowedOrigins = ReadStringArray(configuration, ["CORS:AllowedOrigins"]),
+                AllowedMethods = ReadStringArray(configuration, ["CORS:AllowedMethods"]),
+                AllowedHeaders = ReadStringArray(configuration, ["CORS:AllowedHeaders"]),
+                AllowCredentials = ReadBool(configuration, false, "CORS:AllowCredentials")
             }
         };
     }
@@ -77,10 +92,39 @@ internal sealed class ServerSettings
         return bool.TryParse(value, out var parsed) ? parsed : fallback;
     }
 
+    private static string[] ReadStringArray(IConfiguration configuration, params string[] keys)
+    {
+        var section = configuration.GetSection(keys[0]);
+        var children = section.GetChildren().ToList();
+        if (children.Count > 0)
+        {
+            return children.Select(c => c.Value!).Where(v => !string.IsNullOrWhiteSpace(v)).ToArray();
+        }
+
+        var value = Read(configuration, keys);
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return [];
+        }
+
+        return value.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+    }
+
     private static string NormalizePath(string path) =>
         path.StartsWith('/') ? path : $"/{path}";
 }
 
+internal sealed class CorsSettings
+{
+    public string[] AllowedOrigins { get; init; } = ["*"];
+
+    public string[] AllowedMethods { get; init; } = ["*"];
+
+    public string[] AllowedHeaders { get; init; } = ["*"];
+
+    public bool AllowCredentials { get; init; }
+}
+
 internal sealed class KeycloakSettings
 {
     public string? Authority { get; init; }

src/Ngino.Server/TokenAuthentication.cs

@@ -0,0 +1,311 @@
+using System.Security.Cryptography;
+using System.Text;
+using Ngino.Protocol;
+
+namespace Ngino.Server;
+
+internal static class TokenAuthentication
+{
+    private static readonly PathString PathTokenPrefix = new("/token");
+
+    public static AuthResult Authorize(
+        HttpRequest request,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool allowQueryToken,
+        bool allowPathToken = false)
+    {
+        if (request.Headers.TryGetValue(ProtocolConstants.TokenHeader, out var headerValues))
+        {
+            foreach (var value in headerValues)
+            {
+                var result = AuthorizeUserToken(value, settings, managementStore, updateUserKeyLastUsed: true);
+                if (result.IsAuthorized)
+                {
+                    return result;
+                }
+            }
+        }
+
+        if (request.Headers.TryGetValue("Authorization", out var authorizationValues))
+        {
+            foreach (var value in authorizationValues)
+            {
+                if (TryGetBearerToken(value, out var bearerToken))
+                {
+                    var result = AuthorizeUserToken(bearerToken, settings, managementStore, updateUserKeyLastUsed: true);
+                    if (result.IsAuthorized)
+                    {
+                        return result;
+                    }
+                }
+            }
+        }
+
+        // Path-token auth: useful for clients that cannot send headers.
+        // SECURITY: the token appears in the URL and will be logged by
+        // web servers, proxies, and browsers. Prefer header auth when possible.
+        if (allowPathToken
+            && TryGetPathToken(request.Path, out var pathToken, out _))
+        {
+            var result = AuthorizeUserToken(pathToken, settings, managementStore, updateUserKeyLastUsed: true);
+            if (result.IsAuthorized)
+            {
+                return result;
+            }
+        }
+
+        // Query-string auth: needed for clients that cannot send headers
+        // (e.g. browser address bar, status page).
+        // SECURITY: same URL-logging risks as path-token auth above.
+        if (allowQueryToken
+            && request.Query.TryGetValue("token", out var queryValues))
+        {
+            foreach (var value in queryValues)
+            {
+                var result = AuthorizeUserToken(value, settings, managementStore, updateUserKeyLastUsed: true);
+                if (result.IsAuthorized)
+                {
+                    return result;
+                }
+            }
+        }
+
+        return AuthResult.Failure;
+    }
+
+    public static AuthResult AuthorizeClient(
+        HttpRequest request,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool allowQueryToken,
+        bool allowPathToken = false)
+    {
+        if (request.Headers.TryGetValue(ProtocolConstants.TokenHeader, out var headerValues))
+        {
+            foreach (var value in headerValues)
+            {
+                var result = AuthorizeClientToken(value, settings, managementStore, updateClientKeyLastUsed: true);
+                if (result.IsAuthorized)
+                {
+                    return result;
+                }
+            }
+        }
+
+        if (request.Headers.TryGetValue("Authorization", out var authorizationValues))
+        {
+            foreach (var value in authorizationValues)
+            {
+                if (TryGetBearerToken(value, out var bearerToken))
+                {
+                    var result = AuthorizeClientToken(bearerToken, settings, managementStore, updateClientKeyLastUsed: true);
+                    if (result.IsAuthorized)
+                    {
+                        return result;
+                    }
+                }
+            }
+        }
+
+        if (allowPathToken
+            && TryGetPathToken(request.Path, out var pathToken, out _))
+        {
+            var result = AuthorizeClientToken(pathToken, settings, managementStore, updateClientKeyLastUsed: true);
+            if (result.IsAuthorized)
+            {
+                return result;
+            }
+        }
+
+        if (allowQueryToken
+            && request.Query.TryGetValue("token", out var queryValues))
+        {
+            foreach (var value in queryValues)
+            {
+                var result = AuthorizeClientToken(value, settings, managementStore, updateClientKeyLastUsed: true);
+                if (result.IsAuthorized)
+                {
+                    return result;
+                }
+            }
+        }
+
+        return AuthResult.Failure;
+    }
+
+    public static bool IsAuthorized(
+        HttpRequest request,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool allowQueryToken,
+        bool allowPathToken = false) =>
+        Authorize(request, settings, managementStore, allowQueryToken, allowPathToken).IsAuthorized;
+
+    public static bool IsClientAuthorized(
+        HttpRequest request,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool allowQueryToken,
+        bool allowPathToken = false) =>
+        AuthorizeClient(request, settings, managementStore, allowQueryToken, allowPathToken).IsAuthorized;
+
+    public static bool TryRemovePathToken(
+        PathString path,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        out PathString remainingPath)
+    {
+        remainingPath = path;
+
+        if (!TryGetPathToken(path, out var pathToken, out var tokenRemainingPath)
+            || !IsUserTokenAuthorized(pathToken, settings, managementStore, updateUserKeyLastUsed: false))
+        {
+            return false;
+        }
+
+        remainingPath = string.IsNullOrEmpty(tokenRemainingPath.Value)
+            ? new PathString("/")
+            : tokenRemainingPath;
+        return true;
+    }
+
+    public static bool IsOwnBearerValue(string? value, ServerSettings settings, ManagementStore managementStore) =>
+        TryGetBearerToken(value, out var token)
+        && IsUserTokenAuthorized(token, settings, managementStore, updateUserKeyLastUsed: false);
+
+    private static AuthResult AuthorizeUserToken(
+        string? token,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool updateUserKeyLastUsed)
+    {
+        if (string.IsNullOrWhiteSpace(token))
+        {
+            return AuthResult.Failure;
+        }
+
+        if (!string.IsNullOrWhiteSpace(settings.Token)
+            && CryptographicOperations.FixedTimeEquals(
+                SHA256.HashData(Encoding.UTF8.GetBytes(token)),
+                SHA256.HashData(Encoding.UTF8.GetBytes(settings.Token))))
+        {
+            return AuthResult.Success(null);
+        }
+
+        var userKeyId = managementStore.GetUserKeyId(token);
+        if (userKeyId is not null)
+        {
+            managementStore.IsUserKeyValid(token, updateUserKeyLastUsed);
+            return AuthResult.Success(userKeyId);
+        }
+
+        return AuthResult.Failure;
+    }
+
+    private static AuthResult AuthorizeClientToken(
+        string? token,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool updateClientKeyLastUsed)
+    {
+        if (string.IsNullOrWhiteSpace(token))
+        {
+            return AuthResult.Failure;
+        }
+
+        if (!string.IsNullOrWhiteSpace(settings.ClientToken)
+            && CryptographicOperations.FixedTimeEquals(
+                SHA256.HashData(Encoding.UTF8.GetBytes(token)),
+                SHA256.HashData(Encoding.UTF8.GetBytes(settings.ClientToken))))
+        {
+            return AuthResult.Success(null);
+        }
+
+        var clientKeyId = managementStore.GetClientKeyId(token);
+        if (clientKeyId is not null)
+        {
+            managementStore.IsClientKeyValid(token, updateClientKeyLastUsed);
+            return AuthResult.Success(clientKeyId);
+        }
+
+        return AuthResult.Failure;
+    }
+
+    public static bool IsTokenAuthorized(
+        string? token,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool updateUserKeyLastUsed) =>
+        AuthorizeUserToken(token, settings, managementStore, updateUserKeyLastUsed).IsAuthorized;
+
+    private static bool IsUserTokenAuthorized(
+        string? token,
+        ServerSettings settings,
+        ManagementStore managementStore,
+        bool updateUserKeyLastUsed) =>
+        AuthorizeUserToken(token, settings, managementStore, updateUserKeyLastUsed).IsAuthorized;
+
+    private static bool TryGetBearerToken(string? authorization, out string token)
+    {
+        token = "";
+
+        if (string.IsNullOrWhiteSpace(authorization)
+            || !authorization.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        token = authorization["Bearer ".Length..].Trim();
+        return token.Length > 0;
+    }
+
+    private static bool TryGetPathToken(PathString path, out string pathToken, out PathString remainingPath)
+    {
+        pathToken = "";
+        remainingPath = PathString.Empty;
+
+        if (!path.StartsWithSegments(PathTokenPrefix, out var pathAfterPrefix))
+        {
+            return false;
+        }
+
+        var value = pathAfterPrefix.Value ?? "";
+        if (value.Length <= 1 || value[0] != '/')
+        {
+            return false;
+        }
+
+        var nextSlash = value.IndexOf('/', 1);
+        pathToken = nextSlash < 0
+            ? value[1..]
+            : value[1..nextSlash];
+
+        if (string.IsNullOrEmpty(pathToken))
+        {
+            return false;
+        }
+
+        remainingPath = nextSlash < 0
+            ? PathString.Empty
+            : new PathString(value[nextSlash..]);
+        return true;
+    }
+}
+
+internal sealed class AuthResult
+{
+    public static AuthResult Failure { get; } = new(false, null);
+
+    public static AuthResult Success(string? userKeyId) => new(true, userKeyId);
+
+    public bool IsAuthorized { get; }
+
+    public string? UserKeyId { get; }
+
+    private AuthResult(bool isAuthorized, string? userKeyId)
+    {
+        IsAuthorized = isAuthorized;
+        UserKeyId = userKeyId;
+    }
+}

src/Ngino.Server/TunnelConnection.cs

@@ -1,8 +1,8 @@
 using System.Collections.Concurrent;
 using System.Net.WebSockets;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class TunnelConnection
 {

src/Ngino.Server/TunnelHub.cs

@@ -1,9 +1,9 @@
 using System.Collections.Concurrent;
 using System.Net.WebSockets;
 using System.Threading;
-using ReverseLlama.Protocol;
+using Ngino.Protocol;
 
-namespace ReverseLlama.Server;
+namespace Ngino.Server;
 
 internal sealed class TunnelHub
 {

src/Ngino.Server/appsettings.Example.json

@@ -11,7 +11,7 @@
   "Authentication": {
     "Keycloak": {
       "Authority": "http://your-keycloak-server/realms/master",
-      "ClientId": "ReverseLlama",
+      "ClientId": "Ngino",
       "ClientSecret": "YOUR-Client-SECRET-GOES-HERE-AND-YES-ITS-VERY-LONG",
       "RequireHttpsMetadata": false
     }

src/Ngino.Server/appsettings.json

@@ -0,0 +1,15 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "CORS": {
+    "AllowedOrigins": [ "*" ],
+    "AllowedMethods": [ "GET", "POST", "PUT", "DELETE", "PATCH" ],
+    "AllowedHeaders": [ "Content-Type", "Authorization" ],
+    "AllowCredentials": false
+  },
+  "AllowedHosts": "*"
+}

src/Ngino.Server/wwwroot/admin/app.css

@@ -58,16 +58,12 @@ textarea {
 }
 
 .brand-mark {
-  display: grid;
-  place-items: center;
   width: 34px;
   height: 34px;
   border: 1px solid #4c5d74;
   border-radius: 6px;
   background: #223044;
-  color: #c8f2df;
+  object-fit: cover;
-  font-weight: 800;
-  letter-spacing: 0;
 }
 
 .brand strong,
@@ -167,11 +163,48 @@ textarea {
 }
 
 .field label {
+  display: flex;
+  align-items: center;
+  gap: 6px;
   color: var(--muted);
   font-size: 12px;
   font-weight: 600;
 }
 
+.help-button {
+  display: inline-grid;
+  place-items: center;
+  width: 18px;
+  height: 18px;
+  border: 0;
+  border-radius: 999px;
+  background: var(--panel-alt);
+  color: var(--blue);
+  font-size: 12px;
+  font-weight: 800;
+  cursor: pointer;
+  padding: 0;
+}
+
+.help-button.active {
+  background: var(--blue);
+  color: #ffffff;
+}
+
+.help-popover {
+  position: relative;
+  z-index: 1;
+  margin-top: 4px;
+  padding: 8px 10px;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: #ffffff;
+  color: var(--text);
+  box-shadow: var(--shadow);
+  font-size: 12px;
+  line-height: 1.45;
+}
+
 .input,
 .select,
 .textarea {
@@ -479,6 +512,43 @@ tr:last-child td {
   overflow-wrap: anywhere;
 }
 
+.balance-display {
+  display: flex;
+  align-items: center;
+  gap: 24px;
+}
+
+.balance-current strong {
+  display: block;
+  font-size: 28px;
+  letter-spacing: 0;
+}
+
+.balance-current span {
+  display: block;
+  margin-top: 4px;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.balance-detail {
+  color: var(--muted);
+  font-size: 13px;
+  line-height: 1.6;
+}
+
+.billing-toggle {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+
+.billing-toggle input[type="checkbox"] {
+  width: 18px;
+  height: 18px;
+  margin-top: 4px;
+}
+
 @media (max-width: 860px) {
   .app-shell {
     grid-template-columns: 1fr;
@@ -494,7 +564,7 @@ tr:last-child td {
   }
 
   .nav {
-    grid-template-columns: repeat(4, 1fr);
+    grid-template-columns: repeat(5, 1fr);
   }
 
   .nav a {
@@ -518,6 +588,71 @@ tr:last-child td {
   }
 }
 
+.modal-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 100;
+  display: grid;
+  place-items: center;
+  background: rgba(0, 0, 0, 0.35);
+  opacity: 0;
+  transition: opacity 0.15s;
+}
+
+.modal-overlay.visible {
+  opacity: 1;
+}
+
+.modal-dialog {
+  width: min(480px, calc(100vw - 32px));
+  max-height: calc(100vh - 32px);
+  overflow-y: auto;
+  display: grid;
+  gap: 14px;
+  padding: 20px;
+  border-radius: 10px;
+  background: #ffffff;
+  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
+}
+
+.modal-dialog h3 {
+  margin: 0;
+  font-size: 16px;
+  overflow-wrap: anywhere;
+}
+
+.field-label {
+  color: var(--muted);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.radio-row {
+  display: flex;
+  gap: 14px;
+  align-items: center;
+}
+
+.radio-row label {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 14px;
+  cursor: pointer;
+}
+
+.field-row {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+}
+
+.modal-actions {
+  display: flex;
+  gap: 8px;
+  justify-content: flex-end;
+}
+
 @media (max-width: 520px) {
   .nav {
     grid-template-columns: 1fr;

src/Ngino.Server/wwwroot/admin/index.html

@@ -3,24 +3,26 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>ReverseLlama Admin</title>
+  <title>Ngino Admin</title>
   <link rel="stylesheet" href="/admin/app.css">
 </head>
 <body>
   <div class="app-shell">
     <aside class="sidebar">
       <div class="brand">
-        <span class="brand-mark">RL</span>
+        <img class="brand-mark" src="/admin/Ngino_logo_symbol.png" alt="Ngino">
         <span>
-          <strong>ReverseLlama</strong>
+          <strong>Ngino</strong>
           <small>Admin</small>
         </span>
       </div>
       <nav class="nav" aria-label="Admin sections">
         <a href="#clients" data-nav="clients">Clients</a>
         <a href="#models" data-nav="models">Models</a>
-        <a href="#api-keys" data-nav="api-keys">API keys</a>
+        <a href="#client-keys" data-nav="client-keys">Client keys</a>
+        <a href="#user-keys" data-nav="user-keys">User keys</a>
         <a href="#groups" data-nav="groups">Groups</a>
+        <a href="#usage" data-nav="usage">Usage</a>
       </nav>
       <div class="sidebar-meta" id="sidebarMeta">Loading</div>
     </aside>
@@ -44,6 +46,7 @@
     </main>
   </div>
 
+  <script src="/admin/morphdom-umd.js"></script>
   <script src="/admin/app.js" defer></script>
 </body>
 </html>

src/Ngino.Server/wwwroot/admin/morphdom-umd.js

@@ -0,0 +1,783 @@
+/*!
+ * morphdom
+ * Copyright (c) Patrick Steele-Idem
+ * Licensed under the MIT License.
+ * See /docs/licenses/LICENSE.morphdom
+ */
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+    typeof define === 'function' && define.amd ? define(factory) :
+    (global = global || self, global.morphdom = factory());
+}(this, function () { 'use strict';
+
+    var DOCUMENT_FRAGMENT_NODE = 11;
+
+    function morphAttrs(fromNode, toNode) {
+        var toNodeAttrs = toNode.attributes;
+        var attr;
+        var attrName;
+        var attrNamespaceURI;
+        var attrValue;
+        var fromValue;
+
+        // document-fragments dont have attributes so lets not do anything
+        if (toNode.nodeType === DOCUMENT_FRAGMENT_NODE || fromNode.nodeType === DOCUMENT_FRAGMENT_NODE) {
+          return;
+        }
+
+        // update attributes on original DOM element
+        for (var i = toNodeAttrs.length - 1; i >= 0; i--) {
+            attr = toNodeAttrs[i];
+            attrName = attr.name;
+            attrNamespaceURI = attr.namespaceURI;
+            attrValue = attr.value;
+
+            if (attrNamespaceURI) {
+                attrName = attr.localName || attrName;
+                fromValue = fromNode.getAttributeNS(attrNamespaceURI, attrName);
+
+                if (fromValue !== attrValue) {
+                    if (attr.prefix === 'xmlns'){
+                        attrName = attr.name; // It's not allowed to set an attribute with the XMLNS namespace without specifying the `xmlns` prefix
+                    }
+                    fromNode.setAttributeNS(attrNamespaceURI, attrName, attrValue);
+                }
+            } else {
+                fromValue = fromNode.getAttribute(attrName);
+
+                if (fromValue !== attrValue) {
+                    fromNode.setAttribute(attrName, attrValue);
+                }
+            }
+        }
+
+        // Remove any extra attributes found on the original DOM element that
+        // weren't found on the target element.
+        var fromNodeAttrs = fromNode.attributes;
+
+        for (var d = fromNodeAttrs.length - 1; d >= 0; d--) {
+            attr = fromNodeAttrs[d];
+            attrName = attr.name;
+            attrNamespaceURI = attr.namespaceURI;
+
+            if (attrNamespaceURI) {
+                attrName = attr.localName || attrName;
+
+                if (!toNode.hasAttributeNS(attrNamespaceURI, attrName)) {
+                    fromNode.removeAttributeNS(attrNamespaceURI, attrName);
+                }
+            } else {
+                if (!toNode.hasAttribute(attrName)) {
+                    fromNode.removeAttribute(attrName);
+                }
+            }
+        }
+    }
+
+    var range; // Create a range object for efficently rendering strings to elements.
+    var NS_XHTML = 'http://www.w3.org/1999/xhtml';
+
+    var doc = typeof document === 'undefined' ? undefined : document;
+    var HAS_TEMPLATE_SUPPORT = !!doc && 'content' in doc.createElement('template');
+    var HAS_RANGE_SUPPORT = !!doc && doc.createRange && 'createContextualFragment' in doc.createRange();
+
+    function createFragmentFromTemplate(str) {
+        var template = doc.createElement('template');
+        template.innerHTML = str;
+        return template.content.childNodes[0];
+    }
+
+    function createFragmentFromRange(str) {
+        if (!range) {
+            range = doc.createRange();
+            range.selectNode(doc.body);
+        }
+
+        var fragment = range.createContextualFragment(str);
+        return fragment.childNodes[0];
+    }
+
+    function createFragmentFromWrap(str) {
+        var fragment = doc.createElement('body');
+        fragment.innerHTML = str;
+        return fragment.childNodes[0];
+    }
+
+    /**
+     * This is about the same
+     * var html = new DOMParser().parseFromString(str, 'text/html');
+     * return html.body.firstChild;
+     *
+     * @method toElement
+     * @param {String} str
+     */
+    function toElement(str) {
+        str = str.trim();
+        if (HAS_TEMPLATE_SUPPORT) {
+          // avoid restrictions on content for things like `<tr><th>Hi</th></tr>` which
+          // createContextualFragment doesn't support
+          // <template> support not available in IE
+          return createFragmentFromTemplate(str);
+        } else if (HAS_RANGE_SUPPORT) {
+          return createFragmentFromRange(str);
+        }
+
+        return createFragmentFromWrap(str);
+    }
+
+    /**
+     * Returns true if two node's names are the same.
+     *
+     * NOTE: We don't bother checking `namespaceURI` because you will never find two HTML elements with the same
+     *       nodeName and different namespace URIs.
+     *
+     * @param {Element} a
+     * @param {Element} b The target element
+     * @return {boolean}
+     */
+    function compareNodeNames(fromEl, toEl) {
+        var fromNodeName = fromEl.nodeName;
+        var toNodeName = toEl.nodeName;
+        var fromCodeStart, toCodeStart;
+
+        if (fromNodeName === toNodeName) {
+            return true;
+        }
+
+        fromCodeStart = fromNodeName.charCodeAt(0);
+        toCodeStart = toNodeName.charCodeAt(0);
+
+        // If the target element is a virtual DOM node or SVG node then we may
+        // need to normalize the tag name before comparing. Normal HTML elements that are
+        // in the "http://www.w3.org/1999/xhtml"
+        // are converted to upper case
+        if (fromCodeStart <= 90 && toCodeStart >= 97) { // from is upper and to is lower
+            return fromNodeName === toNodeName.toUpperCase();
+        } else if (toCodeStart <= 90 && fromCodeStart >= 97) { // to is upper and from is lower
+            return toNodeName === fromNodeName.toUpperCase();
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Create an element, optionally with a known namespace URI.
+     *
+     * @param {string} name the element name, e.g. 'div' or 'svg'
+     * @param {string} [namespaceURI] the element's namespace URI, i.e. the value of
+     * its `xmlns` attribute or its inferred namespace.
+     *
+     * @return {Element}
+     */
+    function createElementNS(name, namespaceURI) {
+        return !namespaceURI || namespaceURI === NS_XHTML ?
+            doc.createElement(name) :
+            doc.createElementNS(namespaceURI, name);
+    }
+
+    /**
+     * Copies the children of one DOM element to another DOM element
+     */
+    function moveChildren(fromEl, toEl) {
+        var curChild = fromEl.firstChild;
+        while (curChild) {
+            var nextChild = curChild.nextSibling;
+            toEl.appendChild(curChild);
+            curChild = nextChild;
+        }
+        return toEl;
+    }
+
+    function syncBooleanAttrProp(fromEl, toEl, name) {
+        if (fromEl[name] !== toEl[name]) {
+            fromEl[name] = toEl[name];
+            if (fromEl[name]) {
+                fromEl.setAttribute(name, '');
+            } else {
+                fromEl.removeAttribute(name);
+            }
+        }
+    }
+
+    var specialElHandlers = {
+        OPTION: function(fromEl, toEl) {
+            var parentNode = fromEl.parentNode;
+            if (parentNode) {
+                var parentName = parentNode.nodeName.toUpperCase();
+                if (parentName === 'OPTGROUP') {
+                    parentNode = parentNode.parentNode;
+                    parentName = parentNode && parentNode.nodeName.toUpperCase();
+                }
+                if (parentName === 'SELECT' && !parentNode.hasAttribute('multiple')) {
+                    if (fromEl.hasAttribute('selected') && !toEl.selected) {
+                        // Workaround for MS Edge bug where the 'selected' attribute can only be
+                        // removed if set to a non-empty value:
+                        // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/12087679/
+                        fromEl.setAttribute('selected', 'selected');
+                        fromEl.removeAttribute('selected');
+                    }
+                    // We have to reset select element's selectedIndex to -1, otherwise setting
+                    // fromEl.selected using the syncBooleanAttrProp below has no effect.
+                    // The correct selectedIndex will be set in the SELECT special handler below.
+                    parentNode.selectedIndex = -1;
+                }
+            }
+            syncBooleanAttrProp(fromEl, toEl, 'selected');
+        },
+        /**
+         * The "value" attribute is special for the <input> element since it sets
+         * the initial value. Changing the "value" attribute without changing the
+         * "value" property will have no effect since it is only used to the set the
+         * initial value.  Similar for the "checked" attribute, and "disabled".
+         */
+        INPUT: function(fromEl, toEl) {
+            syncBooleanAttrProp(fromEl, toEl, 'checked');
+            syncBooleanAttrProp(fromEl, toEl, 'disabled');
+
+            if (fromEl.value !== toEl.value) {
+                fromEl.value = toEl.value;
+            }
+
+            if (!toEl.hasAttribute('value')) {
+                fromEl.removeAttribute('value');
+            }
+        },
+
+        TEXTAREA: function(fromEl, toEl) {
+            var newValue = toEl.value;
+            if (fromEl.value !== newValue) {
+                fromEl.value = newValue;
+            }
+
+            var firstChild = fromEl.firstChild;
+            if (firstChild) {
+                // Needed for IE. Apparently IE sets the placeholder as the
+                // node value and vise versa. This ignores an empty update.
+                var oldValue = firstChild.nodeValue;
+
+                if (oldValue == newValue || (!newValue && oldValue == fromEl.placeholder)) {
+                    return;
+                }
+
+                firstChild.nodeValue = newValue;
+            }
+        },
+        SELECT: function(fromEl, toEl) {
+            if (!toEl.hasAttribute('multiple')) {
+                var selectedIndex = -1;
+                var i = 0;
+                // We have to loop through children of fromEl, not toEl since nodes can be moved
+                // from toEl to fromEl directly when morphing.
+                // At the time this special handler is invoked, all children have already been morphed
+                // and appended to / removed from fromEl, so using fromEl here is safe and correct.
+                var curChild = fromEl.firstChild;
+                var optgroup;
+                var nodeName;
+                while(curChild) {
+                    nodeName = curChild.nodeName && curChild.nodeName.toUpperCase();
+                    if (nodeName === 'OPTGROUP') {
+                        optgroup = curChild;
+                        curChild = optgroup.firstChild;
+                    } else {
+                        if (nodeName === 'OPTION') {
+                            if (curChild.hasAttribute('selected')) {
+                                selectedIndex = i;
+                                break;
+                            }
+                            i++;
+                        }
+                        curChild = curChild.nextSibling;
+                        if (!curChild && optgroup) {
+                            curChild = optgroup.nextSibling;
+                            optgroup = null;
+                        }
+                    }
+                }
+
+                fromEl.selectedIndex = selectedIndex;
+            }
+        }
+    };
+
+    var ELEMENT_NODE = 1;
+    var DOCUMENT_FRAGMENT_NODE$1 = 11;
+    var TEXT_NODE = 3;
+    var COMMENT_NODE = 8;
+
+    function noop() {}
+
+    function defaultGetNodeKey(node) {
+      if (node) {
+        return (node.getAttribute && node.getAttribute('id')) || node.id;
+      }
+    }
+
+    function morphdomFactory(morphAttrs) {
+
+      return function morphdom(fromNode, toNode, options) {
+        if (!options) {
+          options = {};
+        }
+
+        if (typeof toNode === 'string') {
+          if (fromNode.nodeName === '#document' || fromNode.nodeName === 'HTML' || fromNode.nodeName === 'BODY') {
+            var toNodeHtml = toNode;
+            toNode = doc.createElement('html');
+            toNode.innerHTML = toNodeHtml;
+          } else {
+            toNode = toElement(toNode);
+          }
+        } else if (toNode.nodeType === DOCUMENT_FRAGMENT_NODE$1) {
+          toNode = toNode.firstElementChild;
+        }
+
+        var getNodeKey = options.getNodeKey || defaultGetNodeKey;
+        var onBeforeNodeAdded = options.onBeforeNodeAdded || noop;
+        var onNodeAdded = options.onNodeAdded || noop;
+        var onBeforeElUpdated = options.onBeforeElUpdated || noop;
+        var onElUpdated = options.onElUpdated || noop;
+        var onBeforeNodeDiscarded = options.onBeforeNodeDiscarded || noop;
+        var onNodeDiscarded = options.onNodeDiscarded || noop;
+        var onBeforeElChildrenUpdated = options.onBeforeElChildrenUpdated || noop;
+        var skipFromChildren = options.skipFromChildren || noop;
+        var addChild = options.addChild || function(parent, child){ return parent.appendChild(child); };
+        var childrenOnly = options.childrenOnly === true;
+
+        // This object is used as a lookup to quickly find all keyed elements in the original DOM tree.
+        var fromNodesLookup = Object.create(null);
+        var keyedRemovalList = [];
+
+        function addKeyedRemoval(key) {
+          keyedRemovalList.push(key);
+        }
+
+        function walkDiscardedChildNodes(node, skipKeyedNodes) {
+          if (node.nodeType === ELEMENT_NODE) {
+            var curChild = node.firstChild;
+            while (curChild) {
+
+              var key = undefined;
+
+              if (skipKeyedNodes && (key = getNodeKey(curChild))) {
+                // If we are skipping keyed nodes then we add the key
+                // to a list so that it can be handled at the very end.
+                addKeyedRemoval(key);
+              } else {
+                // Only report the node as discarded if it is not keyed. We do this because
+                // at the end we loop through all keyed elements that were unmatched
+                // and then discard them in one final pass.
+                onNodeDiscarded(curChild);
+                if (curChild.firstChild) {
+                  walkDiscardedChildNodes(curChild, skipKeyedNodes);
+                }
+              }
+
+              curChild = curChild.nextSibling;
+            }
+          }
+        }
+
+        /**
+        * Removes a DOM node out of the original DOM
+        *
+        * @param  {Node} node The node to remove
+        * @param  {Node} parentNode The nodes parent
+        * @param  {Boolean} skipKeyedNodes If true then elements with keys will be skipped and not discarded.
+        * @return {undefined}
+        */
+        function removeNode(node, parentNode, skipKeyedNodes) {
+          if (onBeforeNodeDiscarded(node) === false) {
+            return;
+          }
+
+          if (parentNode) {
+            parentNode.removeChild(node);
+          }
+
+          onNodeDiscarded(node);
+          walkDiscardedChildNodes(node, skipKeyedNodes);
+        }
+
+        // // TreeWalker implementation is no faster, but keeping this around in case this changes in the future
+        // function indexTree(root) {
+        //     var treeWalker = document.createTreeWalker(
+        //         root,
+        //         NodeFilter.SHOW_ELEMENT);
+        //
+        //     var el;
+        //     while((el = treeWalker.nextNode())) {
+        //         var key = getNodeKey(el);
+        //         if (key) {
+        //             fromNodesLookup[key] = el;
+        //         }
+        //     }
+        // }
+
+        // // NodeIterator implementation is no faster, but keeping this around in case this changes in the future
+        //
+        // function indexTree(node) {
+        //     var nodeIterator = document.createNodeIterator(node, NodeFilter.SHOW_ELEMENT);
+        //     var el;
+        //     while((el = nodeIterator.nextNode())) {
+        //         var key = getNodeKey(el);
+        //         if (key) {
+        //             fromNodesLookup[key] = el;
+        //         }
+        //     }
+        // }
+
+        function indexTree(node) {
+          if (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE$1) {
+            var curChild = node.firstChild;
+            while (curChild) {
+              var key = getNodeKey(curChild);
+              if (key) {
+                fromNodesLookup[key] = curChild;
+              }
+
+              // Walk recursively
+              indexTree(curChild);
+
+              curChild = curChild.nextSibling;
+            }
+          }
+        }
+
+        indexTree(fromNode);
+
+        function handleNodeAdded(el) {
+          onNodeAdded(el);
+
+          var curChild = el.firstChild;
+          while (curChild) {
+            var nextSibling = curChild.nextSibling;
+
+            var key = getNodeKey(curChild);
+            if (key) {
+              var unmatchedFromEl = fromNodesLookup[key];
+              // if we find a duplicate #id node in cache, replace `el` with cache value
+              // and morph it to the child node.
+              if (unmatchedFromEl && compareNodeNames(curChild, unmatchedFromEl)) {
+                curChild.parentNode.replaceChild(unmatchedFromEl, curChild);
+                morphEl(unmatchedFromEl, curChild);
+              } else {
+                handleNodeAdded(curChild);
+              }
+            } else {
+              // recursively call for curChild and it's children to see if we find something in
+              // fromNodesLookup
+              handleNodeAdded(curChild);
+            }
+
+            curChild = nextSibling;
+          }
+        }
+
+        function cleanupFromEl(fromEl, curFromNodeChild, curFromNodeKey) {
+          // We have processed all of the "to nodes". If curFromNodeChild is
+          // non-null then we still have some from nodes left over that need
+          // to be removed
+          while (curFromNodeChild) {
+            var fromNextSibling = curFromNodeChild.nextSibling;
+            if ((curFromNodeKey = getNodeKey(curFromNodeChild))) {
+              // Since the node is keyed it might be matched up later so we defer
+              // the actual removal to later
+              addKeyedRemoval(curFromNodeKey);
+            } else {
+              // NOTE: we skip nested keyed nodes from being removed since there is
+              //       still a chance they will be matched up later
+              removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
+            }
+            curFromNodeChild = fromNextSibling;
+          }
+        }
+
+        function morphEl(fromEl, toEl, childrenOnly) {
+          var toElKey = getNodeKey(toEl);
+
+          if (toElKey) {
+            // If an element with an ID is being morphed then it will be in the final
+            // DOM so clear it out of the saved elements collection
+            delete fromNodesLookup[toElKey];
+          }
+
+          if (!childrenOnly) {
+            // optional
+            var beforeUpdateResult = onBeforeElUpdated(fromEl, toEl);
+            if (beforeUpdateResult === false) {
+              return;
+            } else if (beforeUpdateResult instanceof HTMLElement) {
+              fromEl = beforeUpdateResult;
+              // reindex the new fromEl in case it's not in the same
+              // tree as the original fromEl
+              // (Phoenix LiveView sometimes returns a cloned tree,
+              //  but keyed lookups would still point to the original tree)
+              indexTree(fromEl);
+            }
+
+            // update attributes on original DOM element first
+            morphAttrs(fromEl, toEl);
+            // optional
+            onElUpdated(fromEl);
+
+            if (onBeforeElChildrenUpdated(fromEl, toEl) === false) {
+              return;
+            }
+          }
+
+          if (fromEl.nodeName !== 'TEXTAREA') {
+            morphChildren(fromEl, toEl);
+          } else {
+            specialElHandlers.TEXTAREA(fromEl, toEl);
+          }
+        }
+
+        function morphChildren(fromEl, toEl) {
+          var skipFrom = skipFromChildren(fromEl, toEl);
+          var curToNodeChild = toEl.firstChild;
+          var curFromNodeChild = fromEl.firstChild;
+          var curToNodeKey;
+          var curFromNodeKey;
+
+          var fromNextSibling;
+          var toNextSibling;
+          var matchingFromEl;
+
+          // walk the children
+          outer: while (curToNodeChild) {
+            toNextSibling = curToNodeChild.nextSibling;
+            curToNodeKey = getNodeKey(curToNodeChild);
+
+            // walk the fromNode children all the way through
+            while (!skipFrom && curFromNodeChild) {
+              fromNextSibling = curFromNodeChild.nextSibling;
+
+              if (curToNodeChild.isSameNode && curToNodeChild.isSameNode(curFromNodeChild)) {
+                curToNodeChild = toNextSibling;
+                curFromNodeChild = fromNextSibling;
+                continue outer;
+              }
+
+              curFromNodeKey = getNodeKey(curFromNodeChild);
+
+              var curFromNodeType = curFromNodeChild.nodeType;
+
+              // this means if the curFromNodeChild doesnt have a match with the curToNodeChild
+              var isCompatible = undefined;
+
+              if (curFromNodeType === curToNodeChild.nodeType) {
+                if (curFromNodeType === ELEMENT_NODE) {
+                  // Both nodes being compared are Element nodes
+
+                  if (curToNodeKey) {
+                    // The target node has a key so we want to match it up with the correct element
+                    // in the original DOM tree
+                    if (curToNodeKey !== curFromNodeKey) {
+                      // The current element in the original DOM tree does not have a matching key so
+                      // let's check our lookup to see if there is a matching element in the original
+                      // DOM tree
+                      if ((matchingFromEl = fromNodesLookup[curToNodeKey])) {
+                        if (fromNextSibling === matchingFromEl) {
+                          // Special case for single element removals. To avoid removing the original
+                          // DOM node out of the tree (since that can break CSS transitions, etc.),
+                          // we will instead discard the current node and wait until the next
+                          // iteration to properly match up the keyed target element with its matching
+                          // element in the original tree
+                          isCompatible = false;
+                        } else {
+                          // We found a matching keyed element somewhere in the original DOM tree.
+                          // Let's move the original DOM node into the current position and morph
+                          // it.
+
+                          // NOTE: We use insertBefore instead of replaceChild because we want to go through
+                          // the `removeNode()` function for the node that is being discarded so that
+                          // all lifecycle hooks are correctly invoked
+                          fromEl.insertBefore(matchingFromEl, curFromNodeChild);
+
+                          // fromNextSibling = curFromNodeChild.nextSibling;
+
+                          if (curFromNodeKey) {
+                            // Since the node is keyed it might be matched up later so we defer
+                            // the actual removal to later
+                            addKeyedRemoval(curFromNodeKey);
+                          } else {
+                            // NOTE: we skip nested keyed nodes from being removed since there is
+                            //       still a chance they will be matched up later
+                            removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
+                          }
+
+                          curFromNodeChild = matchingFromEl;
+                          curFromNodeKey = getNodeKey(curFromNodeChild);
+                        }
+                      } else {
+                        // The nodes are not compatible since the "to" node has a key and there
+                        // is no matching keyed node in the source tree
+                        isCompatible = false;
+                      }
+                    }
+                  } else if (curFromNodeKey) {
+                    // The original has a key
+                    isCompatible = false;
+                  }
+
+                  isCompatible = isCompatible !== false && compareNodeNames(curFromNodeChild, curToNodeChild);
+                  if (isCompatible) {
+                    // We found compatible DOM elements so transform
+                    // the current "from" node to match the current
+                    // target DOM node.
+                    // MORPH
+                    morphEl(curFromNodeChild, curToNodeChild);
+                  }
+
+                } else if (curFromNodeType === TEXT_NODE || curFromNodeType == COMMENT_NODE) {
+                  // Both nodes being compared are Text or Comment nodes
+                  isCompatible = true;
+                  // Simply update nodeValue on the original node to
+                  // change the text value
+                  if (curFromNodeChild.nodeValue !== curToNodeChild.nodeValue) {
+                    curFromNodeChild.nodeValue = curToNodeChild.nodeValue;
+                  }
+
+                }
+              }
+
+              if (isCompatible) {
+                // Advance both the "to" child and the "from" child since we found a match
+                // Nothing else to do as we already recursively called morphChildren above
+                curToNodeChild = toNextSibling;
+                curFromNodeChild = fromNextSibling;
+                continue outer;
+              }
+
+              // No compatible match so remove the old node from the DOM and continue trying to find a
+              // match in the original DOM. However, we only do this if the from node is not keyed
+              // since it is possible that a keyed node might match up with a node somewhere else in the
+              // target tree and we don't want to discard it just yet since it still might find a
+              // home in the final DOM tree. After everything is done we will remove any keyed nodes
+              // that didn't find a home
+              if (curFromNodeKey) {
+                // Since the node is keyed it might be matched up later so we defer
+                // the actual removal to later
+                addKeyedRemoval(curFromNodeKey);
+              } else {
+                // NOTE: we skip nested keyed nodes from being removed since there is
+                //       still a chance they will be matched up later
+                removeNode(curFromNodeChild, fromEl, true /* skip keyed nodes */);
+              }
+
+              curFromNodeChild = fromNextSibling;
+            } // END: while(curFromNodeChild) {}
+
+            // If we got this far then we did not find a candidate match for
+            // our "to node" and we exhausted all of the children "from"
+            // nodes. Therefore, we will just append the current "to" node
+            // to the end
+            if (curToNodeKey && (matchingFromEl = fromNodesLookup[curToNodeKey]) && compareNodeNames(matchingFromEl, curToNodeChild)) {
+              // MORPH
+              if(!skipFrom){ addChild(fromEl, matchingFromEl); }
+              morphEl(matchingFromEl, curToNodeChild);
+            } else {
+              var onBeforeNodeAddedResult = onBeforeNodeAdded(curToNodeChild);
+              if (onBeforeNodeAddedResult !== false) {
+                if (onBeforeNodeAddedResult) {
+                  curToNodeChild = onBeforeNodeAddedResult;
+                }
+
+                if (curToNodeChild.actualize) {
+                  curToNodeChild = curToNodeChild.actualize(fromEl.ownerDocument || doc);
+                }
+                addChild(fromEl, curToNodeChild);
+                handleNodeAdded(curToNodeChild);
+              }
+            }
+
+            curToNodeChild = toNextSibling;
+            curFromNodeChild = fromNextSibling;
+          }
+
+          cleanupFromEl(fromEl, curFromNodeChild, curFromNodeKey);
+
+          var specialElHandler = specialElHandlers[fromEl.nodeName];
+          if (specialElHandler) {
+            specialElHandler(fromEl, toEl);
+          }
+        } // END: morphChildren(...)
+
+        var morphedNode = fromNode;
+        var morphedNodeType = morphedNode.nodeType;
+        var toNodeType = toNode.nodeType;
+
+        if (!childrenOnly) {
+          // Handle the case where we are given two DOM nodes that are not
+          // compatible (e.g. <div> --> <span> or <div> --> TEXT)
+          if (morphedNodeType === ELEMENT_NODE) {
+            if (toNodeType === ELEMENT_NODE) {
+              if (!compareNodeNames(fromNode, toNode)) {
+                onNodeDiscarded(fromNode);
+                morphedNode = moveChildren(fromNode, createElementNS(toNode.nodeName, toNode.namespaceURI));
+              }
+            } else {
+              // Going from an element node to a text node
+              morphedNode = toNode;
+            }
+          } else if (morphedNodeType === TEXT_NODE || morphedNodeType === COMMENT_NODE) { // Text or comment node
+            if (toNodeType === morphedNodeType) {
+              if (morphedNode.nodeValue !== toNode.nodeValue) {
+                morphedNode.nodeValue = toNode.nodeValue;
+              }
+
+              return morphedNode;
+            } else {
+              // Text node to something else
+              morphedNode = toNode;
+            }
+          }
+        }
+
+        if (morphedNode === toNode) {
+          // The "to node" was not compatible with the "from node" so we had to
+          // toss out the "from node" and use the "to node"
+          onNodeDiscarded(fromNode);
+        } else {
+          if (toNode.isSameNode && toNode.isSameNode(morphedNode)) {
+            return;
+          }
+
+          morphEl(morphedNode, toNode, childrenOnly);
+
+          // We now need to loop over any keyed nodes that might need to be
+          // removed. We only do the removal if we know that the keyed node
+          // never found a match. When a keyed node is matched up we remove
+          // it out of fromNodesLookup and we use fromNodesLookup to determine
+          // if a keyed node has been matched up or not
+          if (keyedRemovalList) {
+            for (var i=0, len=keyedRemovalList.length; i<len; i++) {
+              var elToRemove = fromNodesLookup[keyedRemovalList[i]];
+              if (elToRemove) {
+                removeNode(elToRemove, elToRemove.parentNode, false);
+              }
+            }
+          }
+        }
+
+        if (!childrenOnly && morphedNode !== fromNode && fromNode.parentNode) {
+          if (morphedNode.actualize) {
+            morphedNode = morphedNode.actualize(fromNode.ownerDocument || doc);
+          }
+          // If we had to swap out the from node with a new node because the old
+          // node was not compatible with the target node then we need to
+          // replace the old DOM node in the original DOM tree. This is only
+          // possible if the original DOM node was part of a DOM tree which
+          // we know is the case if it has a parent node.
+          fromNode.parentNode.replaceChild(morphedNode, fromNode);
+        }
+
+        return morphedNode;
+      };
+    }
+
+    var morphdom = morphdomFactory(morphAttrs);
+
+    return morphdom;
+
+}));

src/ReverseLlama.Client/ClientOptions.cs

@@ -1,141 +0,0 @@
-using ReverseLlama.Protocol;
-
-namespace ReverseLlama.Client;
-
-internal sealed class ClientOptions
-{
-    public Uri Server { get; init; } = new("http://localhost:5001");
-
-    public Uri Upstream { get; init; } = new("http://localhost:11434");
-
-    public string TunnelPath { get; init; } = ProtocolConstants.DefaultTunnelPath;
-
-    public string? Token { get; init; }
-
-    public string ClientId { get; init; } = Environment.MachineName.ToLowerInvariant();
-
-    public TimeSpan ReconnectDelay { get; init; } = TimeSpan.FromSeconds(5);
-
-    public int ChunkSize { get; init; } = 64 * 1024;
-
-    public Uri TunnelUri
-    {
-        get
-        {
-            var builder = new UriBuilder(Server);
-            builder.Scheme = builder.Scheme.ToLowerInvariant() switch
-            {
-                "http" => "ws",
-                "https" => "wss",
-                "ws" => "ws",
-                "wss" => "wss",
-                var unsupported => throw new InvalidOperationException($"Unsupported server URI scheme '{unsupported}'. Use http, https, ws, or wss.")
-            };
-
-            if (string.IsNullOrWhiteSpace(builder.Path) || builder.Path == "/")
-            {
-                builder.Path = NormalizePath(TunnelPath);
-            }
-
-            return builder.Uri;
-        }
-    }
-
-    public static ClientOptions Parse(string[] args)
-    {
-        var values = ParseArgs(args);
-
-        return new ClientOptions
-        {
-            Server = ReadUri(values, "server", "REVERSE_LLAMA_SERVER", "http://localhost:5001"),
-            Upstream = ReadUri(values, "upstream", "REVERSE_LLAMA_UPSTREAM", "http://localhost:11434"),
-            TunnelPath = NormalizePath(Read(values, "tunnel-path", "REVERSE_LLAMA_TUNNEL_PATH") ?? ProtocolConstants.DefaultTunnelPath),
-            Token = Read(values, "token", "REVERSE_LLAMA_TOKEN"),
-            ClientId = Read(values, "client-id", "REVERSE_LLAMA_CLIENT_ID") ?? Environment.MachineName.ToLowerInvariant(),
-            ReconnectDelay = TimeSpan.FromSeconds(ReadInt(values, 5, "reconnect-delay", "REVERSE_LLAMA_RECONNECT_DELAY_SECONDS")),
-            ChunkSize = ReadInt(values, 64 * 1024, "chunk-size", "REVERSE_LLAMA_CHUNK_SIZE")
-        };
-    }
-
-    public static string Usage =>
-        """
-        ReverseLlama.Client options:
-          --server <url>             Server base URL, e.g. http://my-server:5050
-          --upstream <url>           Local upstream URL, e.g. http://localhost:11434
-          --token <value>            Optional token matching the server
-          --client-id <name>         Identifies this machine on the server; defaults to the machine name
-          --tunnel-path <path>       Defaults to /_reverse-llama/tunnel
-          --reconnect-delay <sec>    Defaults to 5
-          --chunk-size <bytes>       Defaults to 65536
-        """;
-
-    private static Dictionary<string, string> ParseArgs(string[] args)
-    {
-        var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
-
-        for (var i = 0; i < args.Length; i++)
-        {
-            var arg = args[i];
-            if (!arg.StartsWith("--", StringComparison.Ordinal))
-            {
-                throw new ArgumentException($"Unexpected argument '{arg}'.");
-            }
-
-            var keyValue = arg[2..].Split('=', 2);
-            if (keyValue.Length == 2)
-            {
-                values[keyValue[0]] = keyValue[1];
-                continue;
-            }
-
-            if (i + 1 >= args.Length || args[i + 1].StartsWith("--", StringComparison.Ordinal))
-            {
-                throw new ArgumentException($"Missing value for '{arg}'.");
-            }
-
-            values[keyValue[0]] = args[++i];
-        }
-
-        return values;
-    }
-
-    private static string? Read(Dictionary<string, string> values, params string[] keys)
-    {
-        foreach (var key in keys)
-        {
-            if (values.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value))
-            {
-                return value;
-            }
-
-            value = Environment.GetEnvironmentVariable(key);
-            if (!string.IsNullOrWhiteSpace(value))
-            {
-                return value;
-            }
-        }
-
-        return null;
-    }
-
-    private static int ReadInt(Dictionary<string, string> values, int fallback, params string[] keys)
-    {
-        var value = Read(values, keys);
-        return int.TryParse(value, out var parsed) && parsed > 0 ? parsed : fallback;
-    }
-
-    private static Uri ReadUri(Dictionary<string, string> values, string key, string envKey, string fallback)
-    {
-        var value = Read(values, key, envKey) ?? fallback;
-
-        if (!Uri.TryCreate(value, UriKind.Absolute, out var uri))
-        {
-            throw new ArgumentException($"'{value}' is not an absolute URI.");
-        }
-
-        return uri;
-    }
-
-    private static string NormalizePath(string path) =>
-        path.StartsWith('/') ? path : $"/{path}";
-}

src/ReverseLlama.Protocol/ProtocolConstants.cs

@@ -1,10 +0,0 @@
-namespace ReverseLlama.Protocol;
-
-public static class ProtocolConstants
-{
-    public const string DefaultStatusPath = "/_reverse-llama/status";
-    public const string DefaultTunnelPath = "/_reverse-llama/tunnel";
-    public const string TokenHeader = "X-Reverse-Llama-Token";
-    public const string ClientIdHeader = "X-Reverse-Llama-Client-Id";
-    public const string ReplacedCloseDescription = "reverse-llama-replaced";
-}

src/ReverseLlama.Server/AdminEndpoints.cs

@@ -1,614 +0,0 @@
-using System.Security.Claims;
-using System.Text;
-using System.Text.Json;
-using Microsoft.AspNetCore.Authentication;
-using Microsoft.AspNetCore.Authentication.Cookies;
-using Microsoft.AspNetCore.Authentication.OpenIdConnect;
-using Microsoft.AspNetCore.StaticFiles;
-
-namespace ReverseLlama.Server;
-
-internal static class AdminEndpoints
-{
-    private static readonly FileExtensionContentTypeProvider ContentTypes = new();
-
-    public static void MapAdminEndpoints(this WebApplication app, ServerSettings settings)
-    {
-        if (settings.Keycloak.IsConfigured)
-        {
-            app.MapGet("/admin/login", (string? returnUrl) =>
-                Results.Challenge(
-                    new AuthenticationProperties { RedirectUri = NormalizeLocalReturnUrl(returnUrl) },
-                    [OpenIdConnectDefaults.AuthenticationScheme]))
-                .AllowAnonymous();
-
-            app.MapPost("/admin/logout", () =>
-                Results.SignOut(
-                    new AuthenticationProperties { RedirectUri = "/admin" },
-                    [CookieAuthenticationDefaults.AuthenticationScheme, OpenIdConnectDefaults.AuthenticationScheme]))
-                .RequireAuthorization();
-        }
-
-        app.MapGet("/admin/auth-error", () =>
-            Results.Text(
-                "Login failed while processing the Keycloak callback. The exception was written to ELMAH.",
-                "text/plain"))
-            .AllowAnonymous();
-
-        var api = app.MapGroup("/api/admin");
-
-        if (settings.Keycloak.IsConfigured)
-        {
-            api.RequireAuthorization();
-        }
-
-        api.MapGet("/summary", (HttpContext context, TunnelHub hub, ManagementStore store) =>
-            Results.Json(BuildSummary(context.User, hub, store, settings)));
-
-        api.MapGet("/me", (HttpContext context, ManagementStore store) =>
-            Results.Json(new
-            {
-                authenticated = context.User.Identity?.IsAuthenticated ?? false,
-                name = GetUserName(context.User),
-                keycloakConfigured = settings.Keycloak.IsConfigured,
-                management = new
-                {
-                    available = store.IsAvailable,
-                    databasePath = store.DatabasePath,
-                    lastError = store.LastError
-                }
-            }));
-
-        api.MapPost("/clients/{clientId}/disable", (string clientId, DisableClientRequest request, ManagementStore store) =>
-        {
-            try
-            {
-                var manual = string.Equals(request.Mode, "manual", StringComparison.OrdinalIgnoreCase);
-                TimeSpan? duration = manual
-                    ? null
-                    : TimeSpan.FromMinutes(Math.Clamp(request.DurationMinutes ?? 60, 1, 24 * 60));
-
-                store.DisableClient(clientId, duration, manual, request.Reason);
-                return Results.Ok(new { clientId, disabled = true });
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-        });
-
-        api.MapPost("/clients/{clientId}/enable", (string clientId, ManagementStore store) =>
-        {
-            try
-            {
-                store.EnableClient(clientId);
-                return Results.Ok(new { clientId, disabled = false });
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-        });
-
-        api.MapGet("/models/detail", async (
-            HttpContext context,
-            string model,
-            string? clientId,
-            TunnelHub hub,
-            ManagementStore store) =>
-        {
-            if (string.IsNullOrWhiteSpace(model))
-            {
-                return Results.BadRequest(new { error = "Model is required." });
-            }
-
-            var modelSummary = BuildModelSummaries(hub, store)
-                .FirstOrDefault(item => item.Name.Equals(model, StringComparison.OrdinalIgnoreCase));
-            var selectedClientId = ResolveModelClientId(hub, modelSummary, model, clientId);
-            object? show = null;
-
-            if (!string.IsNullOrWhiteSpace(selectedClientId))
-            {
-                var connection = hub.Get(selectedClientId);
-                if (connection is not null)
-                {
-                    show = await SendModelCommandForApiAsync(
-                        connection,
-                        "show",
-                        model,
-                        TimeSpan.FromSeconds(60),
-                        context.RequestAborted);
-                }
-            }
-
-            return Results.Json(new
-            {
-                model,
-                listedClients = modelSummary?.ListedClients ?? [],
-                activeClients = modelSummary?.ActiveClients ?? [],
-                metrics = modelSummary?.Metrics ?? EmptyModelMetrics(),
-                selectedClientId,
-                show
-            });
-        });
-
-        api.MapPost("/models/actions", async (
-            HttpContext context,
-            ModelActionRequest request,
-            TunnelHub hub) =>
-        {
-            if (string.IsNullOrWhiteSpace(request.ClientId)
-                || string.IsNullOrWhiteSpace(request.Model)
-                || string.IsNullOrWhiteSpace(request.Action))
-            {
-                return Results.BadRequest(new { error = "Client id, model, and action are required." });
-            }
-
-            if (!TryMapModelAction(request.Action, out var command, out var timeout))
-            {
-                return Results.BadRequest(new { error = $"Unsupported action '{request.Action}'." });
-            }
-
-            var connection = hub.Get(request.ClientId);
-            if (connection is null)
-            {
-                return Results.NotFound(new { error = $"Client '{request.ClientId}' is not connected." });
-            }
-
-            var result = await SendModelCommandForApiAsync(
-                connection,
-                command,
-                request.Model,
-                timeout,
-                context.RequestAborted);
-
-            return Results.Json(result);
-        });
-
-        api.MapGet("/api-keys", (ManagementStore store) =>
-            Results.Json(store.ListApiKeys()));
-
-        api.MapPost("/api-keys", (CreateApiKeyRequest request, ManagementStore store) =>
-        {
-            try
-            {
-                return Results.Json(store.CreateApiKey(request.Name));
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-        });
-
-        api.MapDelete("/api-keys/{id}", (string id, ManagementStore store) =>
-            store.DeleteApiKey(id)
-                ? Results.NoContent()
-                : Results.NotFound(new { error = $"API key '{id}' was not found." }));
-
-        api.MapGet("/groups", (ManagementStore store) =>
-            Results.Json(store.ListGroups()));
-
-        api.MapPost("/groups", (CreateGroupRequest request, ManagementStore store) =>
-        {
-            try
-            {
-                return Results.Json(store.CreateGroup(request.Name));
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-        });
-
-        api.MapGet("/groups/{id}", (string id, ManagementStore store) =>
-        {
-            var group = store.GetGroup(id);
-            return group is not null
-                ? Results.Json(group)
-                : Results.NotFound(new { error = $"Group '{id}' was not found." });
-        });
-
-        api.MapPut("/groups/{id}", (string id, UpdateGroupRequest request, ManagementStore store) =>
-        {
-            if (string.IsNullOrWhiteSpace(request.Name))
-            {
-                return Results.BadRequest(new { error = "Name is required." });
-            }
-
-            return store.UpdateGroup(id, request.Name)
-                ? Results.Ok(store.GetGroup(id))
-                : Results.NotFound(new { error = $"Group '{id}' was not found." });
-        });
-
-        api.MapDelete("/groups/{id}", (string id, ManagementStore store) =>
-            store.DeleteGroup(id)
-                ? Results.NoContent()
-                : Results.NotFound(new { error = $"Group '{id}' was not found." }));
-
-        api.MapGet("/groups/{id}/clients", (string id, ManagementStore store) =>
-        {
-            var group = store.GetGroup(id);
-            if (group is null)
-            {
-                return Results.NotFound(new { error = $"Group '{id}' was not found." });
-            }
-
-            return Results.Json(store.ListGroupClients(id));
-        });
-
-        api.MapPost("/groups/{id}/clients", (string id, AddGroupClientRequest request, ManagementStore store) =>
-        {
-            var group = store.GetGroup(id);
-            if (group is null)
-            {
-                return Results.NotFound(new { error = $"Group '{id}' was not found." });
-            }
-
-            try
-            {
-                var member = store.AddGroupClient(id, request.ClientId, request.Model, request.ClientPattern);
-                return Results.Json(member);
-            }
-            catch (ArgumentException exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = $"Failed to add member: {exception.Message}" });
-            }
-        });
-
-        api.MapDelete("/groups/{groupId}/clients/{clientId:long}", (string groupId, long clientId, ManagementStore store) =>
-        {
-            var group = store.GetGroup(groupId);
-            if (group is null)
-            {
-                return Results.NotFound(new { error = $"Group '{groupId}' was not found." });
-            }
-
-            return store.RemoveGroupClient(clientId)
-                ? Results.NoContent()
-                : Results.NotFound(new { error = $"Client '{clientId}' was not found." });
-        });
-
-        api.MapGet("/api-keys/groups", (ManagementStore store) =>
-            Results.Json(store.ListApiKeyGroups()));
-
-        api.MapPut("/api-keys/{id}/groups", (string id, SetApiKeyGroupsRequest request, ManagementStore store) =>
-        {
-            var keys = store.ListApiKeys();
-            if (!keys.Any(k => k.Id == id))
-            {
-                return Results.NotFound(new { error = $"API key '{id}' was not found." });
-            }
-
-            try
-            {
-                store.SetApiKeyGroups(id, request.GroupIds ?? []);
-                return Results.Ok(new { apiKeyId = id, groupIds = store.GetApiKeyGroupIds(id) });
-            }
-            catch (Exception exception)
-            {
-                return Results.BadRequest(new { error = exception.Message });
-            }
-        });
-
-        var adminHome = app.MapGet("/admin", (IWebHostEnvironment environment) =>
-            ServeAdminAsset(environment, null));
-        var adminAssets = app.MapGet("/admin/{**assetPath}", (IWebHostEnvironment environment, string? assetPath) =>
-            ServeAdminAsset(environment, assetPath));
-
-        if (settings.Keycloak.IsConfigured)
-        {
-            adminHome.RequireAuthorization();
-            adminAssets.RequireAuthorization();
-        }
-    }
-
-    private static object BuildSummary(
-        ClaimsPrincipal user,
-        TunnelHub hub,
-        ManagementStore store,
-        ServerSettings settings) =>
-        new
-        {
-            generatedAtUtc = DateTimeOffset.UtcNow,
-            user = new
-            {
-                name = GetUserName(user),
-                authenticated = user.Identity?.IsAuthenticated ?? false
-            },
-            auth = new
-            {
-                keycloakConfigured = settings.Keycloak.IsConfigured,
-                sharedTokenConfigured = !string.IsNullOrWhiteSpace(settings.Token),
-                apiKeysConfigured = store.HasApiKeys
-            },
-            management = new
-            {
-                available = store.IsAvailable,
-                databasePath = store.DatabasePath,
-                lastError = store.LastError
-            },
-            clients = BuildClientSummaries(hub, store),
-            models = BuildModelSummaries(hub, store),
-            apiKeys = store.ListApiKeys(),
-            groups = store.ListGroups(),
-            apiKeyGroups = store.ListApiKeyGroups(),
-            clientGroups = store.ResolveClientGroups(
-                hub.ClientSnapshots.Select(c => c.Id).ToList())
-        };
-
-    private static IReadOnlyList<ClientSummary> BuildClientSummaries(TunnelHub hub, ManagementStore store)
-    {
-        var connected = hub.ClientSnapshots.ToDictionary(client => client.Id, StringComparer.OrdinalIgnoreCase);
-        var controls = store.ListClientControls();
-        var stats = store.GetClientRequestStats();
-        var clientIds = connected.Keys
-            .Concat(controls.Keys)
-            .Concat(stats.Keys)
-            .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(clientId => clientId, StringComparer.OrdinalIgnoreCase);
-        var result = new List<ClientSummary>();
-
-        foreach (var clientId in clientIds)
-        {
-            connected.TryGetValue(clientId, out var snapshot);
-            controls.TryGetValue(clientId, out var access);
-            stats.TryGetValue(clientId, out var requestStats);
-            access ??= ClientAccess.Enabled;
-
-            result.Add(new ClientSummary(
-                clientId,
-                snapshot is not null,
-                snapshot?.PendingRequests ?? 0,
-                snapshot?.Models ?? [],
-                snapshot?.ActiveModels ?? [],
-                snapshot?.ModelsUpdatedAt,
-                access.IsDisabled,
-                access.DisabledUntilUtc,
-                access.DisabledManually,
-                access.DisabledReason,
-                requestStats ?? new ClientRequestStats(0, 0, 0)));
-        }
-
-        return result;
-    }
-
-    private static IReadOnlyList<ModelSummary> BuildModelSummaries(TunnelHub hub, ManagementStore store)
-    {
-        var listedClients = new Dictionary<string, SortedSet<string>>(StringComparer.OrdinalIgnoreCase);
-        var activeClients = new Dictionary<string, SortedSet<string>>(StringComparer.OrdinalIgnoreCase);
-
-        foreach (var client in hub.ClientSnapshots)
-        {
-            AddModelClients(listedClients, client.Models, client.Id);
-            AddModelClients(activeClients, client.ActiveModels, client.Id);
-        }
-
-        var metrics = store.GetModelUsageStats();
-        var modelNames = listedClients.Keys
-            .Concat(activeClients.Keys)
-            .Concat(metrics.Keys)
-            .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(model => model, StringComparer.OrdinalIgnoreCase);
-        var result = new List<ModelSummary>();
-
-        foreach (var model in modelNames)
-        {
-            metrics.TryGetValue(model, out var modelMetrics);
-
-            result.Add(new ModelSummary(
-                model,
-                listedClients.TryGetValue(model, out var listed) ? listed.ToArray() : [],
-                activeClients.TryGetValue(model, out var active) ? active.ToArray() : [],
-                modelMetrics ?? EmptyModelMetrics()));
-        }
-
-        return result;
-    }
-
-    private static void AddModelClients(
-        Dictionary<string, SortedSet<string>> target,
-        IEnumerable<string> models,
-        string clientId)
-    {
-        foreach (var model in models)
-        {
-            if (!target.TryGetValue(model, out var clients))
-            {
-                clients = new SortedSet<string>(StringComparer.OrdinalIgnoreCase);
-                target[model] = clients;
-            }
-
-            clients.Add(clientId);
-        }
-    }
-
-    private static string? ResolveModelClientId(
-        TunnelHub hub,
-        ModelSummary? modelSummary,
-        string model,
-        string? requestedClientId)
-    {
-        if (!string.IsNullOrWhiteSpace(requestedClientId)
-            && hub.Get(requestedClientId) is not null)
-        {
-            return requestedClientId;
-        }
-
-        return modelSummary?.ActiveClients.FirstOrDefault(clientId => hub.Get(clientId) is not null)
-            ?? modelSummary?.ListedClients.FirstOrDefault(clientId => hub.Get(clientId) is not null)
-            ?? hub.SelectBest(model)?.ClientId;
-    }
-
-    private static ModelUsageStats EmptyModelMetrics() =>
-        new(0, 0, 0, 0, 0);
-
-    private static async Task<object> SendModelCommandForApiAsync(
-        TunnelConnection connection,
-        string command,
-        string model,
-        TimeSpan timeout,
-        CancellationToken cancellationToken)
-    {
-        try
-        {
-            var response = await connection.SendModelCommandAsync(
-                command,
-                model,
-                payloadJson: null,
-                timeout,
-                cancellationToken);
-            var body = response.Body is { Length: > 0 }
-                ? Encoding.UTF8.GetString(response.Body)
-                : "";
-
-            return new
-            {
-                ok = response.StatusCode is >= 200 and < 300,
-                statusCode = response.StatusCode,
-                reasonPhrase = response.ReasonPhrase,
-                body = ParseJsonOrText(body)
-            };
-        }
-        catch (OperationCanceledException)
-        {
-            return new
-            {
-                ok = false,
-                statusCode = StatusCodes.Status504GatewayTimeout,
-                reasonPhrase = "Timed out",
-                body = "The model command timed out."
-            };
-        }
-        catch (Exception exception)
-        {
-            return new
-            {
-                ok = false,
-                statusCode = StatusCodes.Status502BadGateway,
-                reasonPhrase = "Command failed",
-                body = exception.Message
-            };
-        }
-    }
-
-    private static object? ParseJsonOrText(string body)
-    {
-        if (string.IsNullOrWhiteSpace(body))
-        {
-            return null;
-        }
-
-        try
-        {
-            using var document = JsonDocument.Parse(body);
-            return document.RootElement.Clone();
-        }
-        catch (JsonException)
-        {
-            return body.Length <= 100_000 ? body : body[..100_000];
-        }
-    }
-
-    private static bool TryMapModelAction(string action, out string command, out TimeSpan timeout)
-    {
-        command = action.Trim().ToLowerInvariant() switch
-        {
-            "add" or "pull" => "pull",
-            "remove" or "delete" => "delete",
-            "load" => "load",
-            "unload" => "unload",
-            _ => ""
-        };
-
-        timeout = command == "pull" ? TimeSpan.FromMinutes(30) : TimeSpan.FromMinutes(2);
-        return command.Length > 0;
-    }
-
-    private static IResult ServeAdminAsset(IWebHostEnvironment environment, string? assetPath)
-    {
-        var path = string.IsNullOrWhiteSpace(assetPath) ? "index.html" : assetPath;
-
-        if (path.Contains("..", StringComparison.Ordinal)
-            || path.Contains('\\'))
-        {
-            return Results.BadRequest();
-        }
-
-        var file = environment.WebRootFileProvider.GetFileInfo($"admin/{path}");
-        if (!file.Exists && !Path.HasExtension(path))
-        {
-            file = environment.WebRootFileProvider.GetFileInfo("admin/index.html");
-        }
-
-        if (!file.Exists)
-        {
-            return Results.NotFound();
-        }
-
-        ContentTypes.TryGetContentType(file.Name, out var contentType);
-        return Results.Stream(file.CreateReadStream(), contentType ?? "application/octet-stream");
-    }
-
-    private static string NormalizeLocalReturnUrl(string? returnUrl)
-    {
-        if (string.IsNullOrWhiteSpace(returnUrl)
-            || !returnUrl.StartsWith("/", StringComparison.Ordinal)
-            || returnUrl.StartsWith("//", StringComparison.Ordinal))
-        {
-            return "/admin";
-        }
-
-        return returnUrl;
-    }
-
-    private static string? GetUserName(ClaimsPrincipal user) =>
-        user.FindFirst("preferred_username")?.Value
-        ?? user.FindFirst(ClaimTypes.Name)?.Value
-        ?? user.Identity?.Name;
-}
-
-internal sealed record DisableClientRequest(
-    string? Mode,
-    int? DurationMinutes,
-    string? Reason);
-
-internal sealed record ModelActionRequest(
-    string ClientId,
-    string Model,
-    string Action);
-
-internal sealed record CreateApiKeyRequest(string? Name);
-
-internal sealed record CreateGroupRequest(string? Name);
-
-internal sealed record UpdateGroupRequest(string Name);
-
-internal sealed record AddGroupClientRequest(
-    string? ClientId,
-    string? Model,
-    string? ClientPattern);
-
-internal sealed record SetApiKeyGroupsRequest(IReadOnlyList<string>? GroupIds);
-
-internal sealed record ClientSummary(
-    string Id,
-    bool Connected,
-    int PendingRequests,
-    IReadOnlyList<string> Models,
-    IReadOnlyList<string> ActiveModels,
-    DateTimeOffset? ModelsUpdatedAt,
-    bool Disabled,
-    DateTimeOffset? DisabledUntilUtc,
-    bool DisabledManually,
-    string? DisabledReason,
-    ClientRequestStats RequestStats);
-
-internal sealed record ModelSummary(
-    string Name,
-    IReadOnlyList<string> ListedClients,
-    IReadOnlyList<string> ActiveClients,
-    ModelUsageStats Metrics);

src/ReverseLlama.Server/Program.cs

@@ -1,190 +0,0 @@
-using System.Data.SqlClient;
-using System.Net.WebSockets;
-using ElmahCore;
-using ElmahCore.Mvc;
-using Microsoft.AspNetCore.Authentication.Cookies;
-using Microsoft.AspNetCore.Authentication.OpenIdConnect;
-using Microsoft.IdentityModel.Protocols.OpenIdConnect;
-using ReverseLlama.Protocol;
-using ReverseLlama.Server;
-
-var builder = WebApplication.CreateBuilder(args);
-var settings = ServerSettings.FromConfiguration(builder.Configuration);
-
-builder.Services.AddSingleton(settings);
-builder.Services.AddSingleton<TunnelHub>();
-builder.Services.AddSingleton<EmbeddingCache>();
-builder.Services.AddSingleton<ManagementStore>();
-builder.Services.AddElmah<ElmahCore.MySql.MySqlErrorLog>().Configure<ElmahOptions>(
-    options => options.ConnectionString = builder.Configuration.GetConnectionString("ElmahConnection"));
-
-if (settings.Keycloak.IsConfigured)
-{
-    builder.Services
-        .AddAuthentication(options =>
-        {
-            options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
-            options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
-        })
-        .AddCookie(options =>
-        {
-            options.Cookie.Name = "ReverseLlama.Admin";
-            options.Cookie.SameSite = SameSiteMode.Lax;
-            options.Cookie.SecurePolicy = CookieSecurePolicy.SameAsRequest;
-            options.LoginPath = "/admin/login";
-            options.LogoutPath = "/admin/logout";
-        })
-        .AddOpenIdConnect(options =>
-        {
-            options.Authority = settings.Keycloak.Authority;
-            options.ClientId = settings.Keycloak.ClientId;
-            options.ClientSecret = settings.Keycloak.ClientSecret;
-            options.RequireHttpsMetadata = settings.Keycloak.RequireHttpsMetadata;
-            options.ResponseType = OpenIdConnectResponseType.Code;
-            options.ResponseMode = OpenIdConnectResponseMode.Query;
-            options.SaveTokens = true;
-            options.GetClaimsFromUserInfoEndpoint = true;
-            options.CorrelationCookie.SameSite = SameSiteMode.Lax;
-            options.CorrelationCookie.SecurePolicy = CookieSecurePolicy.SameAsRequest;
-            options.NonceCookie.SameSite = SameSiteMode.Lax;
-            options.NonceCookie.SecurePolicy = CookieSecurePolicy.SameAsRequest;
-            options.Scope.Clear();
-            options.Scope.Add("openid");
-            options.Scope.Add("profile");
-            options.Scope.Add("email");
-            options.Events = new OpenIdConnectEvents
-            {
-                OnRemoteFailure = context =>
-                {
-                    var errorLog = context.HttpContext.RequestServices.GetService<ErrorLog>();
-                    if (context.Failure is not null)
-                    {
-                        errorLog?.Log(new Error(context.Failure));
-                    }
-
-                    context.HandleResponse();
-                    context.Response.Redirect("/admin/auth-error");
-                    return Task.CompletedTask;
-                }
-            };
-        });
-}
-
-builder.Services.AddAuthorization();
-
-var app = builder.Build();
-
-var managementStore = app.Services.GetRequiredService<ManagementStore>();
-var tunnelHub = app.Services.GetRequiredService<TunnelHub>();
-managementStore.SetConnectedClientProvider(() => tunnelHub.ClientSnapshots.Select(c => c.Id));
-
-if (settings.Keycloak.IsConfigured)
-{
-    app.UseAuthentication();
-    app.UseAuthorization();
-}
-
-app.UseElmah();
-
-app.Use(async (context, next) =>
-{
-    context.Response.Headers.AccessControlAllowOrigin = "*";
-    context.Response.Headers.AccessControlAllowMethods = "GET, POST, PUT, DELETE, PATCH, OPTIONS";
-    context.Response.Headers.AccessControlAllowHeaders = "Content-Type, Authorization";
-
-    if (HttpMethods.IsOptions(context.Request.Method))
-    {
-        context.Response.StatusCode = StatusCodes.Status204NoContent;
-        return;
-    }
-
-    await next();
-});
-
-app.UseWebSockets(new WebSocketOptions
-{
-    KeepAliveInterval = TimeSpan.FromSeconds(30)
-});
-
-app.MapAdminEndpoints(settings);
-
-app.MapGet("/", (TunnelHub hub) =>
-    Results.Json(new
-    {
-        status = "ok",
-        connected = hub.HasClient,
-        pendingRequests = hub.PendingRequestCount,
-        clients = hub.ClientsSnapshot.Count
-    }));
-
-app.MapGet(settings.StatusPath, (HttpContext context, TunnelHub hub, ServerSettings serverSettings, EmbeddingCache embeddingCache, ManagementStore managementStore) =>
-{
-    // Query token allowed so the status page can be checked in a browser.
-    if (!TokenAuthentication.IsAuthorized(context.Request, serverSettings, managementStore, allowQueryToken: true))
-    {
-        return Results.Unauthorized();
-    }
-
-    return Results.Json(new
-    {
-        connected = hub.HasClient,
-        pendingRequests = hub.PendingRequestCount,
-        tunnelPath = serverSettings.TunnelPath,
-        embeddingCache = new
-        {
-            available = embeddingCache.IsAvailable,
-            count = embeddingCache.Count,
-            databasePath = embeddingCache.DatabasePath,
-            lastError = embeddingCache.LastError
-        },
-        management = new
-        {
-            available = managementStore.IsAvailable,
-            databasePath = managementStore.DatabasePath,
-            lastError = managementStore.LastError
-        },
-        clients = hub.ClientsSnapshot
-    });
-});
-
-app.Map(settings.TunnelPath, async (HttpContext context, TunnelHub hub, ServerSettings serverSettings, ManagementStore managementStore) =>
-{
-    if (!TokenAuthentication.IsAuthorized(context.Request, serverSettings, managementStore, allowQueryToken: true))
-    {
-        context.Response.StatusCode = StatusCodes.Status401Unauthorized;
-        await context.Response.WriteAsync($"Missing or invalid {ProtocolConstants.TokenHeader}.", context.RequestAborted);
-        return;
-    }
-
-    if (!context.WebSockets.IsWebSocketRequest)
-    {
-        context.Response.StatusCode = StatusCodes.Status400BadRequest;
-        await context.Response.WriteAsync("This endpoint only accepts WebSocket tunnel connections.", context.RequestAborted);
-        return;
-    }
-
-    var clientId = context.Request.Headers[ProtocolConstants.ClientIdHeader].FirstOrDefault();
-    if (string.IsNullOrWhiteSpace(clientId))
-    {
-        clientId = $"anonymous-{Guid.NewGuid():n}";
-    }
-
-    using var socket = await context.WebSockets.AcceptWebSocketAsync();
-    await hub.AcceptAsync(clientId, socket, context.RequestAborted);
-});
-
-app.Map("/clients/{clientId}/{**path}", ReverseProxyEndpoint.HandleClientAsync);
-
-app.Map("/{**path}", ReverseProxyEndpoint.HandleRootAsync)
-    .WithOrder(1000);
-
-var elmahService = app.Services.GetRequiredService<ErrorLog>();
-try
-{
-    app.Run();
-}
-catch (Exception exception)
-{
-    elmahService.Log(new Error(exception));
-    throw;
-}

src/ReverseLlama.Server/ReverseLlama.Server.csproj

@@ -1,20 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <ItemGroup>
-    <PackageReference Include="ElmahCore" Version="2.1.2" />
-    <PackageReference Include="ElmahCore.MySql" Version="2.1.2" />
-    <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.28" />
-    <PackageReference Include="Microsoft.Data.Sqlite" Version="8.0.28" />
-    <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="3.0.3" />
-    <PackageReference Include="System.Text.Encodings.Web" Version="8.0.0" />
-    <PackageReference Include="System.Text.Json" Version="8.0.5" />
-    <ProjectReference Include="..\ReverseLlama.Protocol\ReverseLlama.Protocol.csproj" />
-  </ItemGroup>
-
-  <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-  </PropertyGroup>
-
-</Project>

src/ReverseLlama.Server/TokenAuthentication.cs

@@ -1,202 +0,0 @@
-using ReverseLlama.Protocol;
-
-namespace ReverseLlama.Server;
-
-internal static class TokenAuthentication
-{
-    private static readonly PathString PathTokenPrefix = new("/token");
-
-    public static AuthResult Authorize(
-        HttpRequest request,
-        ServerSettings settings,
-        ManagementStore managementStore,
-        bool allowQueryToken,
-        bool allowPathToken = false)
-    {
-        if (string.IsNullOrWhiteSpace(settings.Token) && !managementStore.HasApiKeys)
-        {
-            return AuthResult.Success(null);
-        }
-
-        if (request.Headers.TryGetValue(ProtocolConstants.TokenHeader, out var headerValues))
-        {
-            foreach (var value in headerValues)
-            {
-                var result = AuthorizeToken(value, settings, managementStore, updateApiKeyLastUsed: true);
-                if (result.IsAuthorized)
-                {
-                    return result;
-                }
-            }
-        }
-
-        if (request.Headers.TryGetValue("Authorization", out var authorizationValues))
-        {
-            foreach (var value in authorizationValues)
-            {
-                if (TryGetBearerToken(value, out var bearerToken))
-                {
-                    var result = AuthorizeToken(bearerToken, settings, managementStore, updateApiKeyLastUsed: true);
-                    if (result.IsAuthorized)
-                    {
-                        return result;
-                    }
-                }
-            }
-        }
-
-        if (allowPathToken
-            && TryGetPathToken(request.Path, out var pathToken, out _))
-        {
-            var result = AuthorizeToken(pathToken, settings, managementStore, updateApiKeyLastUsed: true);
-            if (result.IsAuthorized)
-            {
-                return result;
-            }
-        }
-
-        if (allowQueryToken
-            && request.Query.TryGetValue("token", out var queryValues))
-        {
-            foreach (var value in queryValues)
-            {
-                var result = AuthorizeToken(value, settings, managementStore, updateApiKeyLastUsed: true);
-                if (result.IsAuthorized)
-                {
-                    return result;
-                }
-            }
-        }
-
-        return AuthResult.Failure;
-    }
-
-    public static bool IsAuthorized(
-        HttpRequest request,
-        ServerSettings settings,
-        ManagementStore managementStore,
-        bool allowQueryToken,
-        bool allowPathToken = false) =>
-        Authorize(request, settings, managementStore, allowQueryToken, allowPathToken).IsAuthorized;
-
-    public static bool TryRemovePathToken(
-        PathString path,
-        ServerSettings settings,
-        ManagementStore managementStore,
-        out PathString remainingPath)
-    {
-        remainingPath = path;
-
-        if (!TryGetPathToken(path, out var pathToken, out var tokenRemainingPath)
-            || !IsTokenAuthorized(pathToken, settings, managementStore, updateApiKeyLastUsed: false))
-        {
-            return false;
-        }
-
-        remainingPath = string.IsNullOrEmpty(tokenRemainingPath.Value)
-            ? new PathString("/")
-            : tokenRemainingPath;
-        return true;
-    }
-
-    public static bool IsOwnBearerValue(string? value, ServerSettings settings, ManagementStore managementStore) =>
-        TryGetBearerToken(value, out var token)
-        && IsTokenAuthorized(token, settings, managementStore, updateApiKeyLastUsed: false);
-
-    private static AuthResult AuthorizeToken(
-        string? token,
-        ServerSettings settings,
-        ManagementStore managementStore,
-        bool updateApiKeyLastUsed)
-    {
-        if (string.IsNullOrWhiteSpace(token))
-        {
-            return AuthResult.Failure;
-        }
-
-        if (!string.IsNullOrWhiteSpace(settings.Token)
-            && string.Equals(token, settings.Token, StringComparison.Ordinal))
-        {
-            return AuthResult.Success(null);
-        }
-
-        var apiKeyId = managementStore.GetApiKeyId(token);
-        if (apiKeyId is not null)
-        {
-            managementStore.IsApiKeyValid(token, updateApiKeyLastUsed);
-            return AuthResult.Success(apiKeyId);
-        }
-
-        return AuthResult.Failure;
-    }
-
-    public static bool IsTokenAuthorized(
-        string? token,
-        ServerSettings settings,
-        ManagementStore managementStore,
-        bool updateApiKeyLastUsed) =>
-        AuthorizeToken(token, settings, managementStore, updateApiKeyLastUsed).IsAuthorized;
-
-    private static bool TryGetBearerToken(string? authorization, out string token)
-    {
-        token = "";
-
-        if (string.IsNullOrWhiteSpace(authorization)
-            || !authorization.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase))
-        {
-            return false;
-        }
-
-        token = authorization["Bearer ".Length..].Trim();
-        return token.Length > 0;
-    }
-
-    private static bool TryGetPathToken(PathString path, out string pathToken, out PathString remainingPath)
-    {
-        pathToken = "";
-        remainingPath = PathString.Empty;
-
-        if (!path.StartsWithSegments(PathTokenPrefix, out var pathAfterPrefix))
-        {
-            return false;
-        }
-
-        var value = pathAfterPrefix.Value ?? "";
-        if (value.Length <= 1 || value[0] != '/')
-        {
-            return false;
-        }
-
-        var nextSlash = value.IndexOf('/', 1);
-        pathToken = nextSlash < 0
-            ? value[1..]
-            : value[1..nextSlash];
-
-        if (string.IsNullOrEmpty(pathToken))
-        {
-            return false;
-        }
-
-        remainingPath = nextSlash < 0
-            ? PathString.Empty
-            : new PathString(value[nextSlash..]);
-        return true;
-    }
-}
-
-internal sealed class AuthResult
-{
-    public static AuthResult Failure { get; } = new(false, null);
-
-    public static AuthResult Success(string? apiKeyId) => new(true, apiKeyId);
-
-    public bool IsAuthorized { get; }
-
-    public string? ApiKeyId { get; }
-
-    private AuthResult(bool isAuthorized, string? apiKeyId)
-    {
-        IsAuthorized = isAuthorized;
-        ApiKeyId = apiKeyId;
-    }
-}

src/ReverseLlama.Server/appsettings.json

@@ -1,9 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
-}

tests/Ngino.Client.Tests/ClientOptionsTests.cs

@@ -0,0 +1,31 @@
+using Ngino.Client;
+using Xunit;
+
+namespace Ngino.Client.Tests;
+
+public sealed class ClientOptionsTests
+{
+    [Fact]
+    public void InsecureTlsIsDisabledByDefault()
+    {
+        var options = ClientOptions.Parse([]);
+
+        Assert.False(options.InsecureSkipTlsVerify);
+    }
+
+    [Fact]
+    public void InsecureTlsCanBeEnabledWithFlag()
+    {
+        var options = ClientOptions.Parse(["--insecure-skip-tls-verify"]);
+
+        Assert.True(options.InsecureSkipTlsVerify);
+    }
+
+    [Fact]
+    public void InsecureTlsCanBeEnabledWithEnvironmentStyleValue()
+    {
+        var options = ClientOptions.Parse(["--insecure-skip-tls-verify=true"]);
+
+        Assert.True(options.InsecureSkipTlsVerify);
+    }
+}

tests/Ngino.Client.Tests/GroupKeepalivePolicyTests.cs

@@ -0,0 +1,18 @@
+using Ngino.Server;
+using Xunit;
+
+namespace ReverseLlama.Client.Tests;
+
+public class GroupKeepalivePolicyTests
+{
+    [Fact]
+    public void KeepalivePolicy_IsRoundTripped_ThroughGroupClientInfo()
+    {
+        var policy = new GroupClientKeepalivePolicy(2, 3, 4);
+        var info = new GroupClientInfo(1, "group-1", "client-1", "model-a", "pattern", policy);
+
+        Assert.Equal(2, info.KeepalivePolicy?.InstancesToKeepAlive);
+        Assert.Equal(3, info.KeepalivePolicy?.MaxParallelismPerClient);
+        Assert.Equal(4, info.KeepalivePolicy?.ParallelismHeadroom);
+    }
+}

tests/Ngino.Client.Tests/KeepaliveCoordinatorTests.cs

@@ -0,0 +1,45 @@
+using Ngino.Server;
+using Xunit;
+
+namespace ReverseLlama.Client.Tests;
+
+public class KeepaliveCoordinatorTests
+{
+    [Fact]
+    public void PlanActions_LoadsMissingKeepaliveInstances()
+    {
+        var policy = new GroupClientKeepalivePolicy(2, 1, 1);
+        var member = new GroupClientInfo(1, "group-1", "client-1", "bge-m3:latest", null, policy);
+        var candidates = new[]
+        {
+            new KeepaliveCandidate("client-1", true, false),
+            new KeepaliveCandidate("client-2", true, false),
+            new KeepaliveCandidate("client-3", true, true)
+        };
+
+        var actions = KeepaliveCoordinator.PlanActions([member], candidates);
+
+        Assert.Single(actions);
+        Assert.Equal("client-1", actions[0].ClientId);
+        Assert.Equal("load", actions[0].Command);
+        Assert.Equal("bge-m3:latest", actions[0].Model);
+    }
+
+    [Fact]
+    public void PlanActions_UnloadsWhenTooManyInstancesAreActive()
+    {
+        var policy = new GroupClientKeepalivePolicy(1, 1, 1);
+        var member = new GroupClientInfo(2, "group-1", null, "bge-m3:latest", null, policy);
+        var candidates = new[]
+        {
+            new KeepaliveCandidate("client-1", true, true),
+            new KeepaliveCandidate("client-2", true, true)
+        };
+
+        var actions = KeepaliveCoordinator.PlanActions([member], candidates);
+
+        Assert.Single(actions);
+        Assert.Equal("client-1", actions[0].ClientId);
+        Assert.Equal("unload", actions[0].Command);
+    }
+}

tests/Ngino.Client.Tests/Ngino.Client.Tests.csproj

@@ -9,16 +9,17 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
-    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\src\ReverseLlama.Client\ReverseLlama.Client.csproj" />
+    <ProjectReference Include="..\..\src\Ngino.Client\Ngino.Client.csproj" />
+    <ProjectReference Include="..\..\src\Ngino.Server\Ngino.Server.csproj" />
   </ItemGroup>
 
 </Project>

tests/Ngino.Client.Tests/PackageAuditTests.cs

@@ -2,7 +2,7 @@ using System.Diagnostics;
 using System.Text.Json;
 using Xunit;
 
-namespace ReverseLlama.Client.Tests;
+namespace Ngino.Client.Tests;
 
 public sealed class PackageAuditTests
 {
@@ -32,7 +32,7 @@ public sealed class PackageAuditTests
         var directory = new DirectoryInfo(AppContext.BaseDirectory);
         while (directory is not null)
         {
-            var solutionPath = Path.Combine(directory.FullName, "ReverseLlama.sln");
+            var solutionPath = Path.Combine(directory.FullName, "Ngino.sln");
             if (File.Exists(solutionPath))
             {
                 return solutionPath;
@@ -41,7 +41,7 @@ public sealed class PackageAuditTests
             directory = directory.Parent;
         }
 
-        throw new InvalidOperationException("Could not find ReverseLlama.sln from the test output directory.");
+        throw new InvalidOperationException("Could not find Ngino.sln from the test output directory.");
     }
 
     private static async Task<CommandResult> RunDotnetPackageAuditAsync(string solutionPath)

tests/Ngino.Client.Tests/TunnelClientModelTests.cs

@@ -1,8 +1,8 @@
 using System.Text.Json;
-using ReverseLlama.Client;
+using Ngino.Client;
 using Xunit;
 
-namespace ReverseLlama.Client.Tests;
+namespace Ngino.Client.Tests;
 
 public sealed class TunnelClientModelTests
 {
@@ -56,7 +56,7 @@ public sealed class TunnelClientModelTests
         Assert.Equal(HttpMethod.Post, request.Method);
         Assert.Equal("http://localhost:11434/api/embed", request.RequestUri!.AbsoluteUri);
         Assert.Equal("bge-m3:latest", document.RootElement.GetProperty("model").GetString());
-        Assert.Equal("ReverseLlama warmup", document.RootElement.GetProperty("input").GetString());
+        Assert.Equal("Ngino warmup", document.RootElement.GetProperty("input").GetString());
         Assert.Equal(expectedKeepAlive, document.RootElement.GetProperty("keep_alive").GetInt32());
     }
 }

tests/Ngino.Client.Tests/UpstreamRequestTests.cs

@@ -1,7 +1,8 @@
-using ReverseLlama.Client;
+using System.Net.Sockets;
+using Ngino.Client;
 using Xunit;
 
-namespace ReverseLlama.Client.Tests;
+namespace Ngino.Client.Tests;
 
 public sealed class UpstreamRequestTests
 {
@@ -32,4 +33,29 @@ public sealed class UpstreamRequestTests
 
         Assert.Contains("origin-form path", exception.Message);
     }
+
+    [Fact]
+    public void IsConnectionRefused_DetectsSocketConnectionRefused()
+    {
+        var socketException = new SocketException((int)SocketError.ConnectionRefused);
+        var exception = new HttpRequestException("Connection refused", socketException);
+
+        Assert.True(UpstreamRequest.IsConnectionRefused(exception));
+    }
+
+    [Fact]
+    public void IsConnectionRefused_DetectsConnectionRefusedByMessage()
+    {
+        var exception = new HttpRequestException("Connection refused (localhost:8081)");
+
+        Assert.True(UpstreamRequest.IsConnectionRefused(exception));
+    }
+
+    [Fact]
+    public void IsConnectionRefused_IgnoresUnrelatedFailures()
+    {
+        var exception = new HttpRequestException("Connection reset by peer");
+
+        Assert.False(UpstreamRequest.IsConnectionRefused(exception));
+    }
 }