Mechanical Enforcement Rules a reviewer would otherwise have to remember belong in a linter. This skill is the curated catalogue of rules, the linters that enforce them, and the rationale for each — so a new project can be hardened without re-deriving the set. This is a content skill , not a tool. It provides rules and snippets. For wiring those rules into git hooks, see the skill. Principles 1. Mechanical over social . If a rule relies on a reviewer remembering it, it will drift. Encode it in a linter, a type, or a test — never in a convention. 2. Types first, lint second, tests third . Pref…