api-proxy healthcheck flaps during startup, causing Docker Compose to fail #2154

Problem

The api-proxy container healthcheck can flap during startup, causing Docker Compose to mark it as unhealthy. Since the agent container has depends_on: api-proxy: service_healthy, this cascades into a full startup failure with:

dependency failed to start: container awf-api-proxy is unhealthy

This is an intermittent failure — the api-proxy Node.js server may not have fully bound to port 10000 before the healthcheck fires, or transient resource contention on CI runners causes a brief unresponsiveness window.

Current healthcheck config

From src/docker-manager.ts:

healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost:10000/health"]
  interval: 1s
  timeout: 1s
  retries: 5
  start_period: 2s

The start_period: 2s gives only 2 seconds of grace before failures count. Combined with interval: 1s, timeout: 1s, and only retries: 5, a slow Node.js startup can exhaust retries quickly.

Impact

This causes intermittent failures in gh-aw agentic workflows that use --enable-api-proxy. A workaround PR was opened in gh-aw to add a retry wrapper around AWF startup, but the root cause should be fixed here.

Possible fixes

1. Increase start_period — give the Node.js server more time to bind (e.g., 5s or 10s)
2. Increase retries — allow more attempts before marking unhealthy (e.g., 10 or 15)
3. Increase timeout — give each health probe more time (e.g., 2s or 3s)
4. Add startup readiness signal — have the api-proxy write a ready file after all ports are bound, and check for that in the healthcheck instead of (or in addition to) curling the endpoint
5. AWF-level retry — if Docker Compose reports an unhealthy dependency, AWF itself could retry startup (similar to what the gh-aw PR does externally)

References

• gh-aw workaround PR: Mitigate intermittent AWF startup failures when awf-api-proxy health check flaps gh-aw#27909
• Healthcheck config: src/docker-manager.ts (~line 1773)
• api-proxy health endpoint: containers/api-proxy/server.js (~line 908)