Opus finding
Diff step extracts patch for SKILL.md but lock entry's source_path is not used to filter
- skills/skill-update-check/SKILL.md:40-46
The instruction says 'Extract the diff for the SKILL.md file specifically', but multiple SKILL.md files can exist across a skills repo (one per skill). The filter should match `filename == source_path`, not any file named SKILL.md. As written, an agent may pick the wrong skill's diff and run the security scanner on unrelated content, producing misleading PASS/FAIL verdicts.
Recommendation
Replace with: filter `.files[] | select(.filename == "{source_path}")`.