Grill Skill

Interview the user to design a skill's eval, then loop run → diagnose → improve until it ships. Requires caliper (pipx install caliper-eval if missing). Commands, spec skeleton, and task-writing rules: REFERENCE.md.

An eval answers four questions, and the interview covers each:

• Fires: does the agent reach for the skill when it should, and only then? Tested with activates: and trigger probes. Fixed in the description.
• Works: once it fires, does it do the job? Tested with expect: / assert:. Fixed in the body.
• Earns: does it beat the agent without it? Tested against the control: the declared neighbourhood with this skill removed. A task the control passes too is fixed in the task.
• Holds: does it stay good across edits? Tested by comparing each new full run against the previous one.

Entry point

/grill-skill [path]: optional path to a SKILL.md.

• Path given: use it.
• No path: look for SKILL.md in the cwd; if found, confirm before proceeding, else ask where it is.

Phase 1 — Understand