Triage a new skills CLI pull request

Read the actual change

Use read_pull_request with the triggering PR number. Record its head SHA, state, labels, description, and every changed file patch. Stop if it is closed, the head differs from the triggered SHA, or triage:bug-fix is already present. The separate pr-labeling workflow's bug label is neither evidence of validity nor a reason to skip this assessment.

Stop without public effects when files are omitted (filesTruncated), a relevant patch is missing or truncated, or the available context cannot establish the diagnosis. Do not infer correctness from a fix: title, issue number, author, or reported test success alone.

Require a valid bug fix

All of the following must be supported by the visible description and patch: