[AW Top 10] 01 Stop agents ending without a terminal safe output #67446

Priority 1/10 | 12 source issues | Impact 5/5 | Confidence 4/5 | Effort 3/5

One assignment, one coherent fix

Many scheduled and PR workflows finish with missing_terminal_safe_output, most classified as prompt_exhaustion, so no outcome is recorded.

Implementation scope

Add an early context-budget guard and a final-turn reminder in the engine prompt wrapper that forces noop or report_incomplete before exhaustion, and include the classification and last tool in the failure issue.

Done when

• A regression test shows an exhausted run still emits report_incomplete.
• Failure issues for exhausted runs name the budget consumed and the last tool call.

Why now

At least a dozen recent failures across unrelated workflows share this signature, so one wrapper-level change has fleet-wide impact. Some runs are classified unknown, which leaves residual uncertainty.

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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