What problem does it solve? Non-trivial work done by hand is slow, inconsistent, and impossible for a reviewer to re-verify without redoing it. This Skill replaces manual edits, migrations, analyses, and checks with a deterministic tool that produces the same result every time and can be rerun on demand. ## Core Features & Use Cases - Lever-First Workflow: Do the first unit by hand to learn the recipe, then build a codemod, script, or generator and prove it by diffing its output against the hand-done version. - Deterministic Over Fan-Out: Prefer one script that processes every unit in a single pass over delegating repetitive hand-application to subagents. - Delegate Skill Contracts: When fan-out is necessary, write the recipe, verification contract, and do-not-touch fences as a shared skill outside the delegates' write scope. - Use Case: Migrating 200 files to a new API? Build a codemod, verify it against one hand-edited file, rerun it across the codebase, and commit it so reviewers and future runs can re-execute it. ## Quick Start Apply this principle to my current refactoring task by building a rerunnable script that performs the edits and proves the result.
