14 APR 2026
David debugged: Investigated why Lesedi's prefetch showed permanently failed after clicking candidate
David asked agents to investigate a specific user's candidate click that marked prefetch as permanently failed, demanding investigation without code changes.
David identified a specific user (Lesedi, a Wits student) who had a broken lecture notes experience.
go look at lesedi's account (wits student). hes clicked on two lecture notes candidates, one of which said prefetch permanently failed after he clicked on it. go investigate is going on and what the bug is. dont make code changes yet. go investigate. and dont take long minutes running aws queries
The investigation revealed the prefetch coverage rules were too strict: any permanently-failed file (regardless of role) was triggering a hard failure. David directed the removal of two specific rules — the role-blind strict failure on any permanently-failed file, and the primary-strict skip rule — replacing them with a 50% primary coverage threshold.