5bbcaf4c33
Caught by running a side-test through LLM Team's run_codereview
flow (gpt-oss:120b reviewer) against this fixture, 2026-04-22.
BEFORE:
const ourStart = Date.parse(
l1.evidence.match(/tokens=/) ? result.ran_at : result.ran_at
);
// Both branches return result.ran_at — the ternary is meaningless.
// result.ran_at is the fixture start time, NOT the moment we fired
// /v1/chat. Any trace created between fixture-start and chat-fetch
// would false-negative.
AFTER:
const chat_request_sent_ms = Date.now(); // captured before layer 1
// ...
const recent = items.filter(t =>
Date.parse(t.timestamp) >= chat_request_sent_ms
);
Re-ran the fixture against the live stack — layers 1,2,4 still pass
(no regression); layer 2 trace matched at age=2494ms which is within
the chat-to-trace propagation window. Layers 3,5 still fail for the
original unrelated reasons (UpsertOutcome serde panic + Phase 45
slice 3 endpoint not built).
First concrete act-on-finding from a code-checker run. The process
works.