Health Check Implement

Health Model

Response Schema

{
  "status": "healthy",
  "timestamp": "2026-04-14T10:00:00Z",
  "checks": {
    "openai": "healthy",
    "search": "healthy",
    "redis": "degraded"
  },
  "degraded_mode": true
}

Example (Node/Express)

app.get('/health/live', (_req, res) => res.status(200).json({ status: 'alive' }));

app.get('/health/ready', async (_req, res) => {
  const checks = await runReadinessChecks();
  const unhealthy = Object.values(checks).some(v => v === 'unhealthy');
  res.status(unhealthy ? 503 : 200).json({ status: unhealthy ? 'unhealthy' : 'healthy', checks });
});

Best Practices

• Keep liveness cheap and dependency-free.
• Keep readiness dependency-aware.
• Include degraded mode semantics.
• Add timeout per dependency probe.

Validation Checklist

Troubleshooting

Advanced Implementation Notes

Operational Guardrails

• Define measurable SLOs before rollout.
• Capture baseline metrics and compare deltas post-change.
• Add alert thresholds with explicit on-call ownership.
• Use environment-specific overrides for dev/staging/prod.

CI/CD and Validation Expansion

# Example verification sequence
npm run lint
npm test
npm run build

{
  "quality_gate": {
    "required": true,
    "min_score": 0.8,
    "block_on_failure": true
  }
}

Security and Compliance Checks

Performance and Cost Notes

• Budget requests and tokens per endpoint/class of workload.
• Profile p95 and p99 latency as separate objectives.
• Add caching only where correctness is preserved.
• Use periodic reports to catch drift in cost/quality.

Extended Troubleshooting