[self-care:open-source-failures] Fix recurring safe-output processing failures in Dev Practices / Well-Architected

`Dev Practices / Well-Architected` in `githubnext/gh-aw-cao` is repeatedly failing in the `safe_outputs` job during `Process Safe Outputs`, which means the workflow is getting through earlier stages but cannot complete its durable output handoff. The newest bounded evidence shows 5 runs with the same actionable step-level signature, making this a recurring workflow completion defect.

**Action:** Workflow maintainers should inspect the safe-output emission path for `software-development-practices-github-well-architected.lock.yml` and accept when a fresh run completes the `Process Safe Outputs` step successfully without manual retry.

Representative runs:
- `https://github.com/githubnext/gh-aw-cao/actions/runs/33911251599`
- `https://github.com/githubnext/gh-aw-cao/actions/runs/33911234334`
- `https://github.com/githubnext/gh-aw-cao/actions/runs/33911216080`

Critical findings:
- Affected repository: `githubnext/gh-aw-cao`
- Affected workflow: `.github/workflows/software-development-practices-github-well-architected.lock.yml`
- Normalized signature: `Process Safe Outputs`
- Severity: `P1`
- Run count in bounded snapshot: `5`
- Evidence-supported cause: the recurring failure happens in the safe-output processing stage after agent execution; the bounded snapshot does not include the underlying safe-output tool error, so more run-local evidence is required before narrowing the root cause further.
- Confidence: medium

Agent prompt
Investigate why `.github/workflows/software-development-practices-github-well-architected.lock.yml` is repeatedly failing in the `safe_outputs` job at `Process Safe Outputs`. Check the workflow source and any shared safe-output wiring it imports, identify the smallest change that would restore successful safe-output processing, and keep the workflow fail-closed. Do not broaden permissions or bypass safe outputs. When done, summarize the root cause, the exact fix, and the acceptance signal from a successful rerun.

Supporting evidence

The bounded snapshot recorded five matching failures between `2026-09-04T19:26:17Z` and `2026-09-04T19:27:21Z`, all in the same workflow and same step. An additional conclusion-only failure for the same workflow appears nearby in time, which is consistent with recurrence but not strong enough on its own to define the cluster signature.

### Control Plane
- Correlation ID: `33915562891-179`
- Central repository: `githubnext/gh-aw-cao`
- Control plane run URL: `https://github.com/githubnext/gh-aw-cao/actions/runs/33915562891`

> Generated by [SelfCare / Open Source Failures](https://github.com/githubnext/gh-aw-cao/actions/runs/33915982194) · pi · gpt54 · 28.2 AIC · ⌖ 8.57 AIC · ⊞ 8.3K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-cao+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-cao%2Fself-care-open-source-failures%22&type=issues)
> - [x] expires on Sep 18, 2026, 8:29 PM UTC

Start with .github/workflows/software-development-practices-github-well-architected.lock.yml and inspect the safe_outputs wiring it imports. Examine the representative run logs at Process Safe Outputs to find the missing run-local tool error, then verify a minimal fail-closed fix with a fresh run completing that step without manual retry or broadened permissions.

Written by the indexing model from the issue text.