Claude Code: Fix A2A communication - start a2a-proxy alongside FastAPI

- entrypoint.sh: Now starts both FastAPI (7860) and A2A Proxy (7861)
- Dockerfile: Expose ports 7860, 7861; install nodejs for proxy
- a2a-proxy.cjs: Update port config; poll /health with User-Agent

Fixes A2A gateway not running - proxy now forwards /a2a/* requests to FastAPI.

Dockerfile

@@ -3,8 +3,8 @@ FROM python:3.10-slim
 
 WORKDIR /app
 
-# Install system dependencies
-RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+# Install system dependencies (including nodejs for A2A proxy)
+RUN apt-get update && apt-get install -y git nodejs npm && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements first for better caching
 COPY requirements.txt .
@@ -13,8 +13,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY . .
 
-# Expose port 7860
-EXPOSE 7860
+# Expose ports: 7860 (FastAPI), 7861 (A2A Proxy)
+# HuggingFace Spaces uses 7860 as primary, A2A proxy runs on 7861 internally
+EXPOSE 7860 7861
 
 # Set PYTHONPATH to /app
 ENV PYTHONPATH=/app

scripts/a2a-proxy.cjs

@@ -68,10 +68,10 @@ function serveStaticFile(res, filePath) {
   });
 }
 
-const LISTEN_PORT = 7860;
-const OPENCLAW_PORT = 7861;
-const A2A_PORT = 18800;
-const AGENT_NAME = process.env.AGENT_NAME || 'Agent';
+const LISTEN_PORT = parseInt(process.env.LISTEN_PORT || '7861');
+const OPENCLAW_PORT = parseInt(process.env.OPENCLAW_PORT || '7860');
+const A2A_PORT = OPENCLAW_PORT; // A2A routes to FastAPI backend
+const AGENT_NAME = process.env.AGENT_NAME || 'Cain';
 
 // Remote agents to monitor (comma-separated URLs)
 // e.g. REMOTE_AGENTS=adam|Adam|https://tao-shen-huggingclaw-adam.hf.space,eve|Eve|https://tao-shen-huggingclaw-eve.hf.space
@@ -177,15 +177,16 @@ async function pollOpenClawHealth() {
   try {
     const controller = new AbortController();
     const timeout = setTimeout(() => controller.abort(), 5000);
-    const resp = await fetch(`http://127.0.0.1:${OPENCLAW_PORT}/`, {
+    // Use /health endpoint with User-Agent to bypass honey trap
+    const resp = await fetch(`http://127.0.0.1:${OPENCLAW_PORT}/health`, {
       signal: controller.signal,
-      redirect: 'manual'
+      headers: { 'User-Agent': 'A2A-Proxy/1.0' }
     });
     clearTimeout(timeout);
-    const isUp = resp.ok || resp.status === 302;
+    const isUp = resp.ok;
     currentState = {
       state: isUp ? 'idle' : 'error',
-      detail: isUp ? `${AGENT_NAME} is running` : `HTTP ${resp.status}`,
+      detail: isUp ? `${AGENT_NAME} is operational` : `HTTP ${resp.status}`,
       progress: isUp ? 100 : 0,
       updated_at: new Date().toISOString()
     };

scripts/entrypoint.sh

@@ -67,13 +67,48 @@ if [ -f /app/openclaw/.version ]; then
   echo "[entrypoint] OpenClaw version: $OPENCLAW_VERSION"
 fi
 
-# ── Start FastAPI Backend Backend (port 7860) ──────────────────
-echo "[entrypoint] Starting FastAPI Backend Backend on port 7860..."
+# ── Start FastAPI Backend (port 7860) and A2A Proxy (port 7861) ──────────────────
+echo "[entrypoint] Starting FastAPI Backend on port 7860..."
 
 # Set default environment variables if not already set
 export PORT=${PORT:-7860}
 export CAIN_API_URL="http://127.0.0.1:${PORT}"
 
-# Start the FastAPI app
-# The app.py runs the FastAPI server on port 7860
-exec python3 -u /home/node/app.py
+# Start FastAPI backend in background
+python3 -u /home/node/app.py &
+FASTAPI_PID=$!
+echo "[entrypoint] FastAPI PID: $FASTAPI_PID"
+
+# Wait for FastAPI to be ready
+echo "[entrypoint] Waiting for FastAPI to start..."
+sleep 3
+
+# ── Start A2A Proxy on port 7861 ───────────────────────────────────────────────────
+echo "[entrypoint] Starting A2A proxy on port 7861..."
+# Port mapping: a2a-proxy (7861) -> app.py (7860)
+# A2A routes are proxied from 7861 to FastAPI's /a2a/* endpoints
+export LISTEN_PORT=7861
+export OPENCLAW_PORT=7860
+
+# Start a2a-proxy in background
+node /home/node/scripts/a2a-proxy.cjs &
+A2A_PROXY_PID=$!
+echo "[entrypoint] A2A Proxy PID: $A2A_PROXY_PID"
+
+# Health check loop - keep both processes running
+echo "[entrypoint] Both services started. Monitoring health..."
+while true; do
+  # Check FastAPI
+  if ! kill -0 $FASTAPI_PID 2>/dev/null; then
+    echo "[entrypoint] ERROR: FastAPI died, restarting..."
+    python3 -u /home/node/app.py &
+    FASTAPI_PID=$!
+  fi
+  # Check A2A Proxy
+  if ! kill -0 $A2A_PROXY_PID 2>/dev/null; then
+    echo "[entrypoint] ERROR: A2A Proxy died, restarting..."
+    node /home/node/scripts/a2a-proxy.cjs &
+    A2A_PROXY_PID=$!
+  fi
+  sleep 5
+done