Skill fitness

Measures whether a set of skills works, so the fix is chosen from numbers rather than from a hunch. Authoring guidance is skill-authoring's job and this skill does not repeat it; Bash-usage auditing is session-bash-audit's.

Evidence behind the rules below, loaded only when you need it: references/measurements.md for what was measured here — the 119-run trigger ledger, the listing budget read from the binary, and the ledger of five heuristics that failed; references/research.md for published work and other people's tools — SkillsBench, the quality rubric, skill-creator, and what the scanners in this space do and do not detect.

What this skill reads, runs and writes