What problem does it solve? Hand-applied edits, migrations, and checks are slow, inconsistent, and impossible for a reviewer to re-verify without redoing the work. This Skill replaces manual effort with a rerunnable tool that performs or proves the change. ## Core Features & Use Cases - Tool-First Workflow: Do the first unit by hand to learn the recipe, then build a codemod, script, or generator and validate it by diffing against the hand-done version. - Deterministic Verification: Produces a single artifact a reviewer can rerun to confirm the work, turning "trust me" into "run this". - Subagent Coordination: Writes the recipe, verification contract, and do-not-touch fences as a shared skill so delegated subagents follow one hardened version instead of drifting. - Use Case: When migrating hundreds of call sites to a new API, write a codemod that applies the change in one pass and commit it so the next run reruns the tool instead of redoing the edits. ## Quick Start Ask the agent to apply the build-the-lever principle by writing a rerunnable codemod or script for the migration instead of editing files by hand.
