qlty-check

# Qlty Code Quality Universal code quality tool supporting 70+ linters for 40+ languages via qlty CLI. ## When to Use - Check code for linting issues before commit/handoff - Auto-fix formatting and style issues - Calculate code metrics (complexity, duplication) - Find code smells ## Quick Reference ```bash # Check changed files with auto-fix uv run python -m runtime.harness scripts/qlty_check.py --fix # Check all files uv run python -m runtime.harness scripts/qlty_check.py --all # Format files uv run python -m runtime.harness scripts/qlty_check.py --fmt # Get metrics uv run python -m runtime.harness scripts/qlty_check.py --metrics # Find code smells uv run python -m runtime.harness scripts/qlty_check.py --smells ``` ## Parameters | Parameter | Description | |-----------|-------------| | `--check` | Run linters (default) | | `--fix` | Auto-fix issues | | `--all` | Process all files, not just changed | | `--fmt` | Format files instead | | `--metrics` | Calculate code metrics | | `--smells` | Find code smells | | `--paths` | Specific files/directories | | `--level` | Min issue level: note/low/medium/high | | `--cwd` | Working directory | | `--init` | Initialize qlty in a repo | | `--plugins` | List available plugins | ## Common Workflows ### After Implementation ```bash # Auto-fix what's possible, see what remains uv run python -m runtime.harness scripts/qlty_check.py --fix ``` ### Quality Report ```bash # Get metrics for changed code uv run python -m runtime.harness scripts/qlty_check.py --metrics # Find complexity hotspots uv run python -m runtime.harness scripts/qlty_check.py --smells ``` ### Initialize in New Repo ```bash uv run python -m runtime.harness scripts/qlty_check.py --init --cwd /path/to/repo ``` ## Direct CLI (if qlty installed) ```bash # Check changed files qlty check # Auto-fix qlty check --fix # JSON output qlty check --json # Format qlty fmt ``` ## Requirements - **qlty CLI**: https://github.com/qltysh/qlty - **MCP server**: `servers/qlty/server.py` wraps CLI - **Config**: `.qlty/qlty.toml` in repo (run `qlty init` first) ## vs Other Tools | Tool | Use Case | |------|----------| | **qlty** | Unified linting, formatting, metrics for any language | | **ast-grep** | Structural code patterns and refactoring | | **morph** | Fast text search |