Sheriff is a lightweight, zero‑dependency utility for TypeScript projects that enforces module‑boundary and dependency rules, helping teams keep their codebases clean and well‑structured. It lets developers declare public APIs via `index.ts` files, apply tagging‑based access controls, and verify compliance either through an ESLint plugin or a standalone CLI that can init configs, run checks, list modules, and export dependency graphs. Ideal for TypeScript developers and teams who want automated, maintainable architecture enforcement without adding extra runtime dependencies.