Developer builds circuit breaker to stop free AI models failing silently in CI pipelines

A developer discovered that a free AI model integrated into a CI pipeline was silently producing empty changelog entries for a week, with the pipeline reporting no errors. Unlike paid APIs with SLAs, free model endpoints can degrade without triggering alerts, causing automation to ship broken or empty outputs undetected. To address this, the developer built a Python-based router featuring a canary quality gate and a circuit breaker that probes the model before each real request and halts calls after repeated failures. The system routes to a safe deterministic fallback rather than blocking the build when an endpoint is deemed degraded. The approach targets low-stakes CI tasks such as changelog generation and commit message linting, where silent failure is more damaging than occasional mediocre output.