loq 0.1.0a1

Enforce file size constraints

loq

Enforce file size constraints.

loq is a fast, minimal tool that keeps codebases LLM-context-friendly and human-maintainable by enforcing hard per-file line limits. The name visually resembles "loc" (lines of code).

LLMs happily generate big files. Big files burn context, slow reviews, and become dumping grounds. loq provides a hard constraint that stops files from growing too large.

Install

pip install loq

# Or with uv
uv tool install loq

# Or with cargo
cargo install loq

Quick start

# zero-config: uses built-in defaults
loq

# explicit check
loq check src/

# stdin list
git diff --cached --name-only | loq check -

Output

Violations show the file, line count, and how far over the limit:

✖  src/utils.py
   512 lines   (+12 over limit)

Summary:

Found 2 violations in 150 checked files.

  ✖  2 Errors
  ⚠  0 Warnings
  ✔  148 Passed

  Time: 12ms

Config

Create a config with defaults:

loq init

Baseline a legacy repo (exempts current errors, blocks new ones):

loq init --baseline

Config discovery walks upward from each file’s directory and uses the nearest loq.toml. Patterns are matched against paths relative to the config directory.

respect_gitignore defaults to true and applies the root .gitignore when scanning. The built-in defaults do not add any exclude patterns.

Development

Install Rust (once):

rustup default stable

Common tasks:

# build
cargo build

# run the CLI locally
cargo run -p loq -- check .

# install locally
cargo install --path crates/loq_cli

# quick checks (fmt + clippy)
just check

# benchmark against a public repo
just bench https://github.com/astral-sh/ruff

Enable git hooks in this repo:

git config core.hooksPath .githooks

Default loq.toml

default_max_lines = 500

respect_gitignore = true

exclude = []

exempt = []

# Last match wins. Put general rules first and overrides later.
[[rules]]
path = "**/*.tsx"
max_lines = 300
severity = "warning"

[[rules]]
path = "tests/**/*"
max_lines = 500

License

MIT.