01 MAR 2026
David debugged: Caught prefetch_state='failed' contradicting prefetch_metrics showing 6/6 success
David refused to accept that a lecture generation had failed due to missing files when production metrics showed all six files prefetched successfully.
During a lecture generation failure investigation, the agent reported that prefetch had succeeded but then cited prefetch_state='failed' as evidence of a problem.
I don't believe you. go and see what the primary files are that got prefetched and see if they were actually downloaded to s3
David's instinct was correct: prefetch_state had been overwritten with the downstream lecture-generation failure reason, making it appear that prefetch had failed when prefetch_metrics showed attempted=6, completed=6, failed=0. The contradiction was a logging artifact, not a real prefetch failure. This forced a deeper investigation into why the lecture agent failed to insert PDF pages despite having the files.