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So we built the cleanup PR your codebase keeps not getting.
After spending weeks cleaning up hundreds of stale feature flags at a previous company, I realised this was a problem every engineering team faces, but nobody had built a real solution for it.
Feature flags are essential for safe deployments and gradual rollouts. They're meant to be temporary. Once a flag is fully rolled out, removing it falls to the bottom of everyone's priority list. Weeks become months. Months become years. The graveyard grows.
The result: codebases littered with dead conditional logic, branching paths that no longer matter, and developers wasting hours navigating code that should have been cleaned up long ago.
FlagShark exists to solve this. Not with AI that guesses, but with precise, AST-based detection that understands your code structure. We open the cleanup PRs you can review and merge with confidence. You ship features. We retire the flags.
— Joe McGrath, founder
Research shows that 73% of feature flags never get removed. They accumulate silently, adding complexity, slowing onboarding, and hiding subtle bugs behind conditional paths that no longer matter.
The cost compounds quickly. The average team spends 2.5 hours cleaning up a single flag, and most organisations carry enough flag debt to cost $125k+ per year in lost productivity.
Existing solutions fall short. Flag providers profit from more flags, not fewer. Manual cleanup takes too long and gets deprioritised. AI-based tools guess instead of knowing.
Tree-sitter parses your code into an abstract syntax tree. We match flag provider method calls structurally, so there are no false positives from comments or strings. 100% accurate detection across 12 languages.
No AI hallucinations or probabilistic guesses. The same input always produces the same output. Every cleanup PR is a mechanical, verifiable transformation. You can audit it in 30 seconds.
FlagShark opens PRs you review and merge like any other. Your CI runs, your tests pass, you click merge. No new tools to learn, no context switching, no separate dashboard to forget about.
We request read-only access, never store your source code, and process everything in isolated, ephemeral environments. We only persist flag metadata.
AI coding agents are extraordinary at writing code. They are terrible at retiring it. Every additional AI-assisted feature adds another flag, another conditional path, another piece of code that exists but shouldn't.
FlagShark is the deterministic cleanup tool an AI agent can call as a primitive. Today that's feature flags. Tomorrow: dead code, stale config, unused dependencies. The roadmap is the codebase-health stack.
Read the full manifesto →Install the GitHub Action, open a PR, get your first cleanup PR, all in under three minutes.
Free forever for 3 repos · no credit card · works with any flag SDK