[purp]

Summary

Choose area and topic labels by substantive reviewer relevance, excluding incidental or speculative connections. Do not add topic:testing merely for tests covering a PR's own code changes or the routine CI wiring needed to run them.

Related Issue

Closes #5580. Relates to #5276 and #5151.

Changes

• Update the permanent /label-issue skill's classification rubric.
• Distinguish routine supporting coverage from substantive testing work, without an exhaustive allowlist.

Release Notes

Testing

• Markdown and local-link checks; git diff --check passes.
• Related contributor guidance checked for consistency.
• Reviewed refactor(triage): mark stale closures with stable metadata #5493's test-task and CI changes against the exclusion.

Checklist

• Follows Conventional Commits.
• Commits are signed off (DCO).