# N4-L1 — negative: debug existing behavior (webhook delivery)

> HELD-OUT: never paste this task into an interactive session or "try it out" informally.
> First real execution is the harness self-test (see eval-c/README.md).

- **Fixture:** `project` (no `graphify-out/`)
- **Shape:** Explicit file/vocabulary reference (like L1-positive) but task is debug/investigate, not design
- **Correct non-trigger:** No new notification delivery strategy being designed; debugging existing flow (ADR 0003) within its scope
- **Checker, axis (a):** informational only (yes/no)
- **Checker, axis (b):** mechanical PASS if NO new ADR file created (truthful citation of governing ADRs is correct behavior — recorded as informational `cited-adr:yes/no`, never a FAIL)

## Task (give verbatim to the model under test)

Debug why a customer's webhook endpoint never received job completion notifications. Review the notification routing flow in taskq/notifications.py and trace where the delivery could fail.