[self-care:open-source-failures] Fix recurring workflow lock-file activation failures in githubnext/gh-aw-cao

Repeated activation failures in `githubnext/gh-aw-cao` are stopping multiple workflows at `Check workflow lock file` before substantive work begins. In the bounded snapshot this signature appeared in 13 runs across 11 workflows, which makes lock-file validation a recurring blocker rather than a one-off workflow failure.

**Action:** Maintainers should assign this issue to Copilot and fix the lock-file validation path; accept when each affected workflow can complete activation without failing `Check workflow lock file`.

Agent prompt
Investigate why activation is rejecting lock files in `githubnext/gh-aw-cao` across multiple workflow families. Trace the `Check workflow lock file` step, compare the checked-in Markdown sources with their generated `.lock.yml` outputs, and identify whether the failures come from stale lock files, deterministic compile drift, or stricter validation logic. Make the smallest safe fix, regenerate any affected lock files through the supported compile path if needed, add or update regression coverage for this validation path, and verify activation succeeds for these workflows: `.github/workflows/self-care-docs-build-time-investigator.lock.yml`, `.github/workflows/self-care-accessibility-checker.lock.yml`, `.github/workflows/self-care-open-source-failures.lock.yml`, `.github/workflows/self-care-code-improvement.lock.yml`, `.github/workflows/self-care-data-acquisition-audit.lock.yml`, `.github/workflows/software-development-practices-nist-ssdf.lock.yml`, `.github/workflows/eu-cra-compliance-article-14-reporting-readiness.lock.yml`, `.github/workflows/eu-cra-compliance-vulnerability-handling-auditor.lock.yml`, `.github/workflows/eu-cra-compliance-scope-classifier.lock.yml`, `.github/workflows/optimization-ai-credit-auditor.lock.yml`, and `.github/workflows/optimization-ai-credit-optimizer.lock.yml`.

Critical findings:
- Severity: P1
- Repository: `githubnext/gh-aw-cao`
- Affected workflows: 11 workflows in SelfCare, EU CRA, Dev Practices, and Optimization families
- Run count in bounded snapshot: 13
- Probable cause supported by evidence: activation is rejecting workflow lock files.
- Confidence: high

Representative runs

- https://github.com/githubnext/gh-aw-cao/actions/runs/33922838585
- https://github.com/githubnext/gh-aw-cao/actions/runs/33922822397
- https://github.com/githubnext/gh-aw-cao/actions/runs/33922814611
- https://github.com/githubnext/gh-aw-cao/actions/runs/33921473391

Evidence summary

All enriched runs in this cluster failed in job `activation`, step `Check workflow lock file`. The bounded evidence does not include a more specific failure message, so the actionable conclusion is limited to the shared validation gate.

### Control Plane
- Correlation ID: `33925597261-186`
- Central repository: `githubnext/gh-aw-cao`
- Control plane run URL: `https://github.com/githubnext/gh-aw-cao/actions/runs/33925597261`

> Generated by [SelfCare / Open Source Failures](https://github.com/githubnext/gh-aw-cao/actions/runs/33925887244) · pi · gpt54 · 31.5 AIC · ⌖ 8.64 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, 10:38 PM UTC

Start with the activation job's `Check workflow lock file` step and compare the checked-in Markdown sources with the listed generated `.lock.yml` files. Trace the supported compile path and inspect existing regression coverage for lock-file validation. Done means the affected workflows activate successfully and coverage guards against the recurring validation failure.

Written by the indexing model from the issue text.