setup-pre-commit

A setup guide for Git pre-commit hooks, which run checks automatically before a commit is created. It selects a hook tool for JavaScript, Python, Go, Rust, or OCaml projects.

In plain words
What is it for?
Use it to install commit-time formatting, type-checking, and test gates based on the project's language and package tools.
Why use it?
It catches formatting, type-checking, and test failures before they enter the project's history.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/outlinedriven/odin-gemini-cli-extension/setup-pre-commit
Any agent
npx skills add OutlineDriven/odin-gemini-cli-extension --skill setup-pre-commit
Clone the repo
git clone --depth 1 https://github.com/OutlineDriven/odin-gemini-cli-extension

Made for: Claude Code, Codex.

Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 997 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00073 $0.00997
Opus 5 $0.00036 $0.00498
Sonnet 5 $0.00015 $0.00199
Haiku 4.5 $0.00007 $0.00100

Measured 2d ago against content hash afc1f6d1e3ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

setup-pre-commit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to setup-pre-commit — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/setup-pre-commit/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Detect the ecosystem, pick the right hook tool, install with formatter + type-check + test gates.

Detection (run first)

Dispatch Explore agent — or for a single-language repo, probe directly via fd for lockfile / manifest signature. Map the first manifest hit to an ecosystem. Multi-language repos: ask the maintainer which surface to gate, or apply both.

Ecosystem → hook tool

Ecosystem Hook tool Install command
npm / yarn / pnpm / bun husky + lint-staged <pm> add -D husky lint-staged prettier && npx husky init
Python (poetry/pip) pre-commit (framework) pipx install pre-commit && pre-commit install
Go lefthook (or pre-commit) go install github.com/evilmartians/lefthook@latest && lefthook install
Rust (cargo) cargo-husky (or pre-commit) add cargo-husky as [dev-dependencies]; runs on cargo test
OCaml (dune) pre-commit + dune hooks pipx install pre-commit && pre-commit install

Per-ecosystem hook contents

Node ecosystems — write .husky/pre-commit:

npx lint-staged
<pm> run typecheck
<pm> run test

Drop missing scripts and tell the user. Write .lintstagedrc:

{ "*": "prettier --ignore-unknown --write" }

Formatter policy is out of scope for this skill. Do NOT auto-create .prettierrc. If no Prettier config exists, surface that fact and ask the user.

Python — write .pre-commit-config.yaml:

repos:
  - repo: https://github.com/astral-sh/ruff-pre-commit
    rev: v0.6.0
    hooks:
      - id: ruff
      - id: ruff-format
  - repo: local
    hooks:
      - id: pyright
        name: pyright
        entry: pyright
        language: system
        pass_filenames: false
      - id: pytest
        name: pytest
        entry: pytest -q
        language: system
        pass_filenames: false
        stages: [pre-commit]

Read the full file on GitHub · 114 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 114 lines · 73 tokens per session scan A afc1f6d1e3ec

Subscribe to this mod's changes

setup-pre-commit is a skill published in the GitHub repository OutlineDriven/odin-gemini-cli-extension (5 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 73 tokens to every session and 997 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to setup-pre-commit, differing in 0 lines, and is treated as a copy.

Related

Other skills, from other repositories