Effortless Configuration Management with check-config

Keep your development environment consistent, shareable, and version-controlled

check-config is a fast, lightweight, declarative configuration management tool that ensures your configuration files contain exactly what they should. Instead of managing entire config files, you declare specific parts that must be present - making configurations shareable, maintainable, and verifiable.

How It Works

Define your configuration requirements in simple TOML files, then let check-config ensure they're applied:

# Set your preferred editor
[[lines_present]]
file = "~/.bashrc"
lines = "export EDITOR=hx"

# Ensure git signing is configured
[[lines_present]]
file = "~/.gitconfig"
lines = """
[gpg]
        format = ssh
[commit]
        gpgsign = true
"""

Run check-config --fix to apply changes, or check-config to verify everything is in sync.

Why check-config?

🔧 Shareable Configuration Snippets

Traditional dotfile repositories force users to adopt entire configuration files. check-config lets you share just the essential parts:

• Share your preferred Python formatting rules without forcing your entire pyproject.toml
• Distribute security settings without overwriting personal aliases
• Collaborate on team standards while preserving individual preferences

✅ Enforce Team Standards

Ensure consistent development environments across your team:

# In CI: Verify configurations are up-to-date
check-config

# For developers: Apply required configurations  
check-config --fix

Perfect for ensuring tools like Ruff, Black, and ESLint use consistent settings across all developers and CI pipelines.

📦 Composable Configuration

Combine multiple configuration files to build your complete setup:

• Base configurations for your team
• Personal tweaks and preferences
• Project-specific requirements
• Environment-specific overrides

Beyond Simple Lines

check-config supports multiple checker types for different configuration needs:

• Lines present/absent: Shell configs, text files
• Key-value pairs: TOML, JSON, YAML files
• File existence: Ensure critical files exist
• And more: See docs/checkers.md for all features

Get Started

Make a check-config.toml according your needs:

# Set your preferred editor
[[lines_present]]
file = "~/.bashrc"
lines = "export EDITOR=hx"

And use it:

# Check if configurations match requirements
check-config

# Apply missing configurations
check-config --fix

Documentation

📖 Full Documentation - Complete guides, examples, and API reference

Declare what you need. Share what matters. Keep everything in sync.