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Incident Agent Reported 'Healthy' Pipeline Using Stale Cached Data, Not Live Checks

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A developer building Pipeline Rescue Agent, a Next.js incident-investigation tool, discovered a logic bug where the app reported a pipeline as 'Healthy' even when live Fivetran telemetry was unavailable. When the live data fetch failed, the app silently fell back to cached connector status showing 'connected' and 'on_schedule,' and used that stale snapshot to issue a current health verdict. No exception was raised and the API request completed successfully, making the false 'Healthy' verdict invisible without inspecting the evidence source alongside the final decision. The flaw mattered beyond display: the health verdict directly influenced which issues the agent prioritized for further investigation, meaning a false green could cause real problems to go unexamined. The fix involved ensuring that cached, non-live evidence could no longer satisfy a present-tense health determination, and Sentry instrumentation was used to reproduce, diagnose, and verify the correction across deliberate repository states.

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