[docs] Update documentation for features from 2026-03-30

[github-actions]

Documentation Updates - 2026-03-30

This PR updates the documentation based on features merged in the last 24 hours.

Features Documented

• needs: ordering for custom safe-output jobs with compile-time validation (from feat: compile-time validation of needs: ordering on custom safe-output jobs #23486)

📝 Detailed Changes & References

Changes Made

• Updated docs/src/content/docs/reference/custom-safe-outputs.md:
  • Added needs: property to the Job Properties reference table
  • Added new "Job Ordering (needs:)" section explaining valid targets, compile-time validation, and automatic normalization (safe-outputs → safe_outputs)

Merged PRs Referenced

• feat: compile-time validation of needs: ordering on custom safe-output jobs #23486 — feat: compile-time validation of needs: ordering on custom safe-output jobs
• feat: add runs-on-slim for compile-stable framework job runner override #23490 — feat: add runs-on-slim for compile-stable framework job runner override (already documented in the same PR commit)
• Fix: include custom jobs, scripts, and actions in <safe-output-tools> prompt block #23487 — Fix: include custom jobs, scripts, and actions in <safe-output-tools> prompt block (internal bug fix, no user-visible documentation gap)

Notes

• The runs-on-slim frontmatter field (PR feat: add runs-on-slim for compile-stable framework job runner override #23490) was documented inline with the code change — self-hosted-runners.md and frontmatter.md were both created/updated in that same commit, so no additional documentation was needed.
• The needs: validation feature is the primary user-facing documentation gap from today's merged PRs.

Note

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• expires on Mar 31, 2026, 1:32 AM UTC