Originally published on tamiz.pro .

Every codebase has ghosts. They're not the kind that go bump in the night — they're the functions nobody calls, the branches nobody reaches, and the dependencies nobody imports. Dead code is the quietest form of technical debt: it compiles, it lints, it passes tests, and it does absolutely nothing. Left alone, it multiplies.

This article dissects the anatomy of dead code, quantifies the damage it silently inflicts on your build times, bundle size, and team morale, and then walks through a battle-tested arsenal of open-source tools — knip , depcheck , madge , ts-prune , and more — that can exorcise it from your project for good.

1. What Dead Code Actually Is

2. The Real Cost of Dead Code

3. How Ghosts Sneak In

4. The Open-Source Ghostbusting Arsenal

5. A Practical Ghostbusting Workflow

6. A Real-World Exorcism, Step by Step

7. When Dead Code Is (Sometimes) Fine

Frequently Asked Questions

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