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 enforces a working principle: for any non-trivial edits, migrations, analyses, or checks, build a deterministic tool (codemod, script, generator, or delegate skill) that does or proves the work, so the artifact itself can be rerun and reviewed. ## Core Features & Use Cases - Lever-First Workflow: Do the first unit by hand to learn the recipe, then build the tool and prove it by diffing its output against the hand-done version. - Tool Selection Guidance: Use codemods or scripts for edits, generators for repetitive files, dump-to-sqlite queries for analysis, and rerunnable checks for verification. - Subagent Contract Pattern: When fanning work out to subagents, write the recipe, verification contract, and do-not-touch fences as a shared skill outside the delegates' write scope. - Use Case: Migrating hundreds of files to a new API? Instead of editing each one, write a codemod, verify it against one hand-edited file, rerun it across the codebase, and commit the script so reviewers can rerun it. ## Quick Start Ask the agent to apply the build-the-lever principle by writing a rerunnable script or codemod for the current migration instead of editing files manually.
