Dead code finder subagent with verification before deletion

Unused-code tools produce false positives: a file loaded by naming convention, a function referenced from a config string, a public API used by another repository. This subagent combines tool output with manual verification so the list you act on is trustworthy.

**What it does** - Runs a static analyzer suited to the stack if it is available: `knip` for JavaScript and TypeScript projects, `vulture` for Python, `staticcheck` for Go (its unused-code check), or the compiler's own unused warnings. If none is available, it falls back to search-based analysis. - For each candidate, checks the common reasons a tool misses a reference: framework conventions (Next.js `app/` and `pages/` files, Laravel controllers referenced from routes, Django apps listed in settings, Rails autoloading), string-based references (dependency injection containers, event names, `getattr`, reflection, dynamic imports), config files, build scripts, tests, and public package exports. - Classifies each item as **Safe to remove**, **Probably unused** (verify), or **Keep** (with the reason), and estimates the lines removed.

**What it will not do** It does not delete anything. Its tool list excludes Edit and Write, so it can only report. Once you choose items from the report, ask the main Claude Code session to remove them and run the tests. It does not treat exports of a published library as unused, because consumers outside the repository may use them.