Enable deepseek using the router mode

CLAUDE.md

@@ -0,0 +1,25 @@
+# CLAUDE.md
+
+## Build/Lint/Test Commands
+- Install dependencies: `npm i`
+- Start server: `node index.mjs` (requires OPENAI_API_KEY, OPENAI_BASE_URL, OPENAI_MODEL env vars)
+- Set environment variables:
+  ```shell
+  export DISABLE_PROMPT_CACHING=1
+  export ANTHROPIC_AUTH_TOKEN="test"
+  export ANTHROPIC_BASE_URL="http://127.0.0.1:3456"
+  export API_TIMEOUT_MS=600000
+  ```
+
+## Code Style Guidelines
+- Follow existing formatting in README.md and other files
+- Use ES module syntax (`import`/`export`)
+- Environment variables are uppercase with underscores
+- API endpoints use `/v1/` prefix
+- JSON payloads follow strict structure with model, max_tokens, messages, system, etc.
+- Include type information in JSON payloads where possible
+- Use descriptive variable names
+- Keep code modular - separate files for router, index, etc.
+- Include example usage/documentation in README
+- Use markdown code blocks for code samples
+- Document API endpoints and parameters