| name | qlty-check |
|---|
| description | Code quality checks, formatting, and metrics via qlty CLI |
|---|
| allowed-tools | ["Bash", "Read"] |
|---|
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
# 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
# Auto-fix what's possible, see what remains
uv run python -m runtime.harness scripts/qlty_check.py --fix
Quality Report
# 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
uv run python -m runtime.harness scripts/qlty_check.py --init --cwd /path/to/repo
Direct CLI (if qlty installed)
# 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 |