Dart Undead (`dart-undead`)

Deterministic reachability and dead/unused declaration analysis for Dart and Flutter packages using pkg:undead.

1. When to Use This Skill

Use this skill when auditing codebase health, trimming dead weight from mature packages, identifying orphaned internal abstractions, or cleaning up standalone applications and CLI tools.

Unlike basic lexical lints (unused_element, unused_field) which only detect unused file-private (_) identifiers, undead builds a whole-package reachability graph from designated entrypoint roots down to all internal declarations.