SkillAdaptor

Validation-gated skill evolution from agent failure trajectories (step-level t★, Validator Δ>0). Use when: (1) Agent failed on a task and you have execution trajectories or logs, (2) User asks to evolve, adapt, or improve SKILL.md from failures, (3) Benchmark run produced trajectories under .skill-adaptor/artifacts/, (4) User wants training-free skill bank growth with held-out validation — NOT one-shot log-to-skill. Prefer SkillNet ($skillnet) search first; use this skill when failures need verified adaptation. NOT for: packaging a chat log without re-execution (use skillnet create instead).

Run SkillAdaptor to evolve agent skills from task failures. Use when improving SKILL.md files from trajectories or after benchmark runs.