[AW Top 10] 06 Stop codex resume retries from invalid item IDs #66490

Priority 6/10 | 4 source issues | Impact 3/5 | Confidence 3/5 | Effort 2/5

One assignment, one coherent fix

Codex runs retried as resume fail with an invalid_request_body error saying input item IDs must begin with fc, and every retry hits the same error. The engine driver then exits without a terminal safe output.

Implementation scope

Reproduce the resume failure in the codex harness, then either stop resuming when the error is a deterministic request-body rejection or sanitize the replayed item IDs. Report the cause in the failure issue.

Done when

• A harness test shows an invalid_request_body resume error is not retried identically.
• The failure issue names the request-body rejection rather than a generic driver failure.

Why now

Two issues show the identical error and two more show the same workflow failing with driver exit one. The latter pair is plausibly the same cause but is not verified.

Unchanged AW sources close only after this summary is completed. Newer source activity and not-planned retirement do not trigger source closure. Assigned summaries are frozen; unassign to allow reclustering.

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