Add support for OpenAI Chat Completions API compatible third party providers & local models

.gitignore

@@ -33,3 +33,6 @@ dist-ssr
 # other secret files
 .env.local
 .env.langfuse
+
+# local models config
+local-models.json

README.md

@@ -211,6 +211,52 @@ npm run dev
   NGROK_URL="<NGROK URL>" # Optional local Supabase Storage tunnel for provider-readable signed URLs
   ```
 
+### 3. Optional Local LLM Models
+
+To add your own local models (LM Studio, Ollama, LiteLLM, etc.) alongside the cloud models:
+
+1. Start one or more local OpenAI-compatible servers (for example LM Studio on port `1234`).
+2. Copy the example catalog and edit entries to match your servers:
+
+   ```bash
+   cp local-models.json.example local-models.json
+   ```
+
+   Each entry needs an `id`, `name`, `description`, and `baseUrl`. The `id` must match what your server exposes.
+
+   Example:
+
+   ```json
+   {
+     "id": "qwen2.5-vl-7b-instruct",
+     "name": "Qwen2.5 VL 7B",
+     "description": "Local VLM",
+     "baseUrl": "http://localhost:1234",
+     "supportsTools": true,
+     "supportsVision": true,
+     "useForAux": true
+   },
+   {
+     "id": "deepseek-v4-flash",
+     "name": "DeepSeek v4 Flash",
+     "description": "Third Party LLM",
+     "baseUrl": "https://api.deepseek.com",
+     "apiKey": "DEEPSEEK_API_KEY",
+     "supportsTools": true,
+     "supportsThinking": true,
+     "supportsVision": false,
+     "useForAux": false
+   }
+   ```
+
+3. Set local model API keys in `.env.local`.
+   - `apiKey` in `local-models.json` should be the env var name, not the secret value.
+     - Example: `"apiKey": "DEEPSEEK_API_KEY"` and then set `DEEPSEEK_API_KEY="<your key>"` in `.env.local`.
+
+4. Restart `npm run dev`. Models with a `baseUrl` appear in the parametric model picker.
+
+Cloud models (Gemini, Claude, OpenAI, Z-AI) keep using their existing cloud routes. Only ids listed in `local-models.json` with a `baseUrl` are sent to that model's server.
+
 ## 🌐 Setting Up ngrok for Local Development
 
 CADAM uses public URLs for provider callbacks and local signed storage URLs:

local-models.json.example

@@ -0,0 +1,23 @@
+[
+  {
+    "id": "qwen2.5-vl-7b-instruct",
+    "name": "Qwen2.5 VL 7B",
+    "description": "Local VLM",
+    "baseUrl": "http://localhost:1234",
+    "supportsTools": true,
+    "supportsThinking": false,
+    "supportsVision": true,
+    "useForAux": true
+  },
+  {
+    "id": "deepseek-v4-flash",
+    "name": "DeepSeek v4 Flash",
+    "description": "Third Party LLM",
+    "baseUrl": "https://api.deepseek.com",
+    "apiKey": "DEEPSEEK_API_KEY",
+    "supportsTools": true,
+    "supportsThinking": true,
+    "supportsVision": false,
+    "useForAux": false
+  },
+]