Debug a failed Render deploy with your coding agent

Render’s agent debug loop for failed deploys combines the Render MCP server, which provides deploy status, logs, metrics, and redeploy capabilities, with the render-debug skill, which diagnoses common failure patterns. The recommended six-stage process is to read the failed deploy’s evidence, diagnose a named cause supported by log lines, propose a fix for human review, push approved code changes or manually apply configuration changes in the Render Dashboard, redeploy while avoiding overlapping deployments, and confirm success through both logs and metrics. The guide addresses common issues including failure to bind to the PORT variable on 0.0.0.0, missing environment variables, incorrect build or start commands, out-of-memory crashes, and failing health checks, with suggested investigation prompts and remediation approaches for each. Users remain responsible for approving repository changes, managing sensitive configuration and operational settings such as instance type, deciding when to clear build caches, and reassessing new evidence if a redeploy fails again.

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