> ## Documentation Index
> Fetch the complete documentation index at: https://internal.softcrum.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Runbook — Dead Letter Review & Replay

> 1. Alert fires (new rows in core.dead_letters). Triage by queue + last_error grouping in Softcrum Ops. 2. Poison (schema-invalid): fix producer, mark discarded with reason. 3.

1. Alert fires (new rows in core.dead\_letters). Triage by queue + last\_error grouping in Softcrum Ops.
2. Poison (schema-invalid): fix producer, mark discarded with reason.
3. Transient exhausted (provider outage): bulk replay from Ops (re-publishes with SAME job\_id — processed\_jobs guarantees no double effects).
4. Logic bug: fix + test, replay, verify downstream effects via correlation\_id trace.
5. Weekly: dead\_letters must trend to zero; standing categories become engineering tickets.