linthis

A fast, cross-platform multi-language linter and formatter written in Rust.

Features

• Single Command: Run linting, formatting, security, and complexity checks simultaneously
• Multi-Language Support: Rust, Python, TypeScript, JavaScript, Go, Java, C++, Swift, Kotlin, Lua, Dart, Shell, Ruby, PHP, Scala, C# and more
• Auto-Detection: Automatically detect programming languages used in your project
• Security Scanning (SAST): Built-in secrets detection + OpenGrep/Semgrep, Bandit, Gosec, Flawfinder
• Complexity Analysis: Cyclomatic/cognitive complexity per function with threshold enforcement
• Flexible Configuration: Support for project config, global config, and CLI parameters with dotted key paths
• Plugin System: Share and reuse configurations via Git repositories (HTTPS with SSH auto-fallback)
• Format Presets: Support for popular code styles like Google, Airbnb, Standard
• Parallel Processing: Leverage multi-core CPU for faster file processing with per-file caching
• Fix Commit Mode: Three modes for auto-fix handling — squash / dirty / fixup
• Self-Update: linthis update with install method detection (cargo, pip, uv, pipx)
• Global Data Storage: Runtime data stored in ~/.linthis/projects/ — keeps project directory clean

Quick Links

• Installation - Get linthis installed
• Quick Start - Start using linthis in minutes
• Configuration - Configure linthis for your project
• Languages - Supported programming languages
• CLI Reference - Complete command-line reference

Example Usage

# Check and format current directory
linthis

# Check only (no formatting)
linthis -c
linthis --check-only

# Format only (no checking)
linthis -f
linthis --format-only

# Check Git staged files
linthis -s
linthis --staged

Video Tutorials

See linthis in action with short video demos:

1. Quick Start — Install and run your first check (20s)
2. Multi-Language — Auto-detect 18+ languages (15s)
3. Plugin System — Share configs across teams (20s)
4. AI Fix — AI-powered code fixes (20s)
5. Git Hooks — Automatic pre-commit linting (15s)
6. Editor Integration — VS Code, JetBrains, Neovim, Claude Code (15s)
7. AI Agent Hook — AI agent integration (20s)

Why linthis?

1. Unified Interface: One tool for all languages instead of managing multiple linters
2. Fast: Written in Rust with parallel processing support
3. Easy Setup: Works out of the box with sensible defaults
4. Team Friendly: Plugin system for sharing configurations across projects