We Built an On-Call Agent That Failed the Right Way — Memory Can Learn the Wrong Lesson

Similar-Split7292 · reddit · 2026-09-29

A team of four spent a weekend building Provenance, an on-call agent that investigates incidents in a simulated company, learns from past incidents via Hindsight, and verifies its memories before acting.

The author's key insight wasn't making the agent succeed, but designing an incident where it fails for the right reason: s16 was a poisoned queue message disguised as a memory leak; the agent followed a familiar pattern, suggested a rollback, and missed the real cause.

Takeaway: an agent can have memory and still learn the wrong lesson. The write-up covers building the incident, designing realistic investigation evidence, and how agent memory should actually be used.

Related event: Developers Build Hindsight-Powered Memory Layers for Incident Agents, With Mixed Results(16 posts)→

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