Top DEAD-CODE GitHub Repositories & Tools (2026)

Codebase intelligence for TypeScript and JavaScript. Free static analysis of code and styles: unused code, duplication, circular deps, complexity hotspots, architecture boundaries, design-system drift. Optional paid runtime layer (Fallow Runtime): hot-path review and cold-path deletion evidence from real production traffic.

Codebase intelligence for AI and humans: code health scores, auto-generated docs, git analytics, dead code detection, and architectural decisions via MCP.

💀 PHP unused code detection via PHPStan extension. Detects dead cycles, supports libs like Laravel, Symfony, Twig, Doctrine, PHPUnit etc. Can automatically remove dead PHP code. Able to detect dead code used only in tests. Finds unused methods, constants, properties and enum cases.

Open source local-first PR scanner that finds dead code, security bugs, secrets, quality regressions, and AI-code mistakes before merge. For first timers refer to https://duriantaco.github.io/skylos/repo-map/

Deterministic, local-first memory and guardrails for AI coding agents with no LLM in the hot path.

Agent skills for fallow, codebase intelligence for TypeScript and JavaScript. Teaches AI agents how to find unused code, duplication, circular deps, complexity hotspots, architecture drift, design-system drift, and (with Fallow Runtime) hot-path and cold-path evidence. Works with Claude Code, Cursor, Codex, Gemini CLI, and 30+ agents.