prototype: Replace LLM orchestration with agent CLI exec

.gitignore

@@ -6,3 +6,4 @@ test-results/
 .specstory/
 chart/chartsmith/*.tgz
 .direnv/
+claude-service/node_modules/

claude-service/.dockerignore

@@ -0,0 +1,5 @@
+node_modules
+dist
+*.log
+.env
+.env.*

claude-service/Dockerfile

@@ -0,0 +1,37 @@
+# Build stage
+FROM node:22-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY tsconfig.json ./
+COPY src ./src
+
+RUN npm run build
+
+# Production stage
+FROM node:22-alpine
+
+WORKDIR /app
+
+# Install production dependencies only
+COPY package*.json ./
+RUN npm ci --omit=dev && npm cache clean --force
+
+# Copy built files
+COPY --from=builder /app/dist ./dist
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001 -G nodejs
+
+USER nodejs
+
+EXPOSE 3100
+
+ENV NODE_ENV=production
+ENV PORT=3100
+
+CMD ["node", "dist/index.js"]

claude-service/README.md

@@ -0,0 +1,124 @@
+# Claude Service
+
+A Node.js service that wraps the official Anthropic Claude SDK, providing HTTP endpoints for the Go worker to consume.
+
+## Why?
+
+The official Anthropic SDK is only available for Node.js and Python. This service allows the Go worker to access SDK-exclusive features like:
+
+- Prompt caching
+- Extended thinking (Claude 3.7+)
+- Better streaming primitives
+- Faster feature parity with API releases
+
+## Endpoints
+
+### Health Check
+```
+GET /health
+```
+
+### Messages (Non-streaming)
+```
+POST /v1/messages
+Content-Type: application/json
+
+{
+  "model": "claude-3-7-sonnet-20250219",
+  "max_tokens": 8192,
+  "system": "You are a helpful assistant.",
+  "messages": [
+    {"role": "user", "content": "Hello!"}
+  ]
+}
+```
+
+### Messages (Streaming)
+```
+POST /v1/messages/stream
+Content-Type: application/json
+Accept: text/event-stream
+
+{
+  "model": "claude-3-7-sonnet-20250219",
+  "max_tokens": 8192,
+  "messages": [
+    {"role": "user", "content": "Hello!"}
+  ]
+}
+```
+
+Returns Server-Sent Events (SSE):
+```
+event: content_block_delta
+data: {"type":"content_block_delta","delta":{"type":"text_delta","text":"Hello"}}
+
+event: message_stop
+data: {"type":"message_stop","message":{...}}
+
+event: done
+data: [DONE]
+```
+
+### Extended Thinking (Claude 3.7+)
+```
+POST /v1/messages/think
+Content-Type: application/json
+Accept: text/event-stream
+
+{
+  "model": "claude-3-7-sonnet-20250219",
+  "max_tokens": 16000,
+  "thinking": {
+    "type": "enabled",
+    "budget_tokens": 10000
+  },
+  "messages": [
+    {"role": "user", "content": "Solve this complex problem..."}
+  ]
+}
+```
+
+## Development
+
+```bash
+# Install dependencies
+npm install
+
+# Run in development mode (with hot reload)
+npm run dev
+
+# Type check
+npm run typecheck
+
+# Build for production
+npm run build
+
+# Run production build
+npm start
+```
+
+## Environment Variables
+
+- `ANTHROPIC_API_KEY` - Required. Your Anthropic API key.
+- `PORT` - Optional. Server port (default: 3100).
+
+## Docker
+
+```bash
+# Build
+docker build -t claude-service .
+
+# Run
+docker run -p 3100:3100 -e ANTHROPIC_API_KEY=your-key claude-service
+```
+
+## Integration with Go Worker
+
+Set the `CLAUDE_SERVICE_URL` environment variable in the Go worker to enable routing Claude calls through this service:
+
+```bash
+export CLAUDE_SERVICE_URL=http://localhost:3100
+```
+
+When this variable is set, supported LLM functions will use the Node service instead of the Go Anthropic SDK.