Project Detected: Node.js Express application --- Webhook Integration Added: - Provider: GitHub - Direction: Incoming - Event: Repository push events --- Security Controls: - Added GitHub HMAC signature verification - Webhook secret is loaded from GITHUB_WEBHOOK_SECRET - Invalid signatures return HTTP 401 --- Reliability Controls: - GitHub delivery ID is used to prevent duplicate processing - Unsupported event types are acknowledged without running push logic --- Files Modified: - src/routes/webhooks.js - src/services/githubWebhookService.js - src/app.js - tests/githubWebhook.test.js - .env.example --- Commands Executed: - npm test --- Validation Result: Webhook routing, signature verification, duplicate detection, and push event tests passed using mocked GitHub payloads. --- How to Test: Send a signed fixture request to POST /webhooks/github using the local test command documented in tests/githubWebhook.test.js. --- Important Notes: Set GITHUB_WEBHOOK_SECRET locally before connecting the endpoint to a real repository. No real GitHub webhook was created during validation.