Developer finds AI agent confidently cited accurate but outdated memory file

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A developer building a cross-session memory system for an AI agent discovered a subtle failure mode when the agent gave incomplete GitHub token scope advice sourced from a stale reference file. The agent correctly quoted its own memory file, but that file had not been updated after a workflow-scope bug was fixed and logged separately three weeks earlier. Unlike outright hallucination, the agent expressed full confidence because it was citing a real, sourced document — it was simply no longer complete. The root cause was a structural gap: bug fixes were appended to a log file, but no process existed to sync those changes back to the summary reference file. The developer resolved the specific instance manually and updated the protocol to require cross-file updates whenever a bug fix changes a previously documented fact.

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