Lint GitHub Repositories (2026) · Open Source Tools

Static analysis for the debt AI agents leave in PHP: 26 rules, Claude Code hooks, git-diff review, a Rector and Pint fix pass, Pest expectations, CI annotations and an MCP server. Deterministic, local, no LLM.

An extremely fast Python linter and code formatter, written in Rust.

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 20 MB of RAM.

Copy/paste detector for source code. 220+ languages, Rust engine, SARIF/HTML/badge reporters, GitHub Action, MCP server for AI agents.

🐘 Linter for Postgres migrations & SQL

Find and fix problems in your JavaScript code.

🐶 Automated code review tool integrated with any code analysis tools regardless of programming language

:pencil: A markup-aware linter for prose built with speed and extensibility in mind.

A typescript-go toolchain, with evidence graph

Static code analysis for Kotlin

It's not just a linter that annoys you!

Fast linters runner for Go

A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.

⚓ A collection of high-performance JavaScript tools.

A tool to enforce Swift style and conventions.

:sparkles: Monorepo for all the tooling which enables ESLint to support TypeScript

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

A bunch of lints to catch common mistakes and improve your Rust code. Book: https://doc.rust-lang.org/clippy/

✂️ Find unused files, dependencies and exports in your JavaScript and TypeScript projects. Knip it before you ship it!

More than 300 powerful ESLint rules