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.
npx skills add julianobarbosa/claude-code-skills --skill pre-commitgit clone --depth 1 https://github.com/julianobarbosa/claude-code-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/julianobarbosa/claude-code-skills/pre-commit)<a href="https://agentmods.dev/skills/julianobarbosa/claude-code-skills/pre-commit"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/pre-commit/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/julianobarbosa/claude-code-skills/pre-commit"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/pre-commit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00071 | $0.01167 |
| Opus 5 | $0.00036 | $0.00583 |
| Sonnet 5 | $0.00014 | $0.00233 |
| Haiku 4.5 | $0.00007 | $0.00117 |
Grade A, and why
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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PreCommit
A comprehensive skill for managing pre-commit hooks - the framework for multi-language pre-commit hook management that automates code quality, formatting, linting, and security scanning.
Quick Reference
| Command | Description |
|---|---|
pre-commit install |
Install git hooks |
pre-commit run --all-files |
Run all hooks on all files |
pre-commit autoupdate |
Update hooks to latest versions |
pre-commit run <hook-id> |
Run specific hook |
Workflow Routing
| Workflow | Trigger | File |
|---|---|---|
| Setup | "setup pre-commit", "initialize hooks", "create config" | Workflows/Setup.md |
| AddHooks | "add hook", "add linting", "add formatter", "add security" | Workflows/AddHooks.md |
| Troubleshoot | "fix pre-commit", "hook failing", "debug hooks" | Workflows/Troubleshoot.md |
| CIIntegration | "CI pipeline", "GitHub Actions", "GitLab CI" | Workflows/CIIntegration.md |
| CustomHook | "create custom hook", "local hook", "write hook" | Workflows/CustomHook.md |
Documentation
| Document | Purpose |
|---|---|
QuickStartGuide.md |
Installation and first-time setup |
HooksReference.md |
Comprehensive hook catalog by language/purpose |
ConfigurationGuide.md |
Advanced configuration options |
SecurityHooks.md |
Secret detection and security scanning |
Tools
| Tool | Purpose |
|---|---|
Tools/PreCommitManager.ts |
CLI for managing pre-commit configurations |
Tools/HookGenerator.ts |
Generate .pre-commit-config.yaml templates |
Tools/HookValidator.ts |
Validate hook configurations |
Examples
Example 1: Setup pre-commit for a new project
User: "Setup pre-commit for my Python project"
→ Invokes Setup workflow
→ Creates .pre-commit-config.yaml with Python hooks (black, isort, flake8)
→ Runs pre-commit install
Example 2: Add Terraform hooks
User: "Add Terraform validation hooks"
→ Invokes AddHooks workflow
→ Adds terraform_fmt, terraform_validate, terraform_docs hooks
→ Configures tflint and checkov integration
What ships with it
13 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- ConfigurationGuide.md 6.2 KB
- HooksReference.md 10 KB
- QuickStartGuide.md 4.3 KB
- SecurityHooks.md 7.1 KB
- Tools/HookGenerator.ts 14 KB runs code
- Tools/HookValidator.ts 13 KB runs code
- Tools/package.json 983 B
- Tools/PreCommitManager.ts 11 KB runs code
- Workflows/AddHooks.md 4.1 KB
- Workflows/CIIntegration.md 7.6 KB
- Workflows/CustomHook.md 7.3 KB
- Workflows/Setup.md 4.2 KB
- Workflows/Troubleshoot.md 5.3 KB
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.
- 8d ago First seen · 100 lines · 71 tokens per session scan A b89c2e67a705
pre-commit is a skill published in the GitHub repository julianobarbosa/claude-code-skills (10 stars, last pushed 16d ago), licensed MIT. It adds 71 tokens to every session and 1,167 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
prowler-commit
Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.
gh-auth-isolation
Safely manage multiple GitHub identities (EMU + personal) in agent workflows.
comet-github
A routing guide for Comet-related GitHub work. It directs requests about pull requests, issues, CI failures, ideas, and fixes to the appropriate review or implementation process.
github-skill
Work with GitHub via the gh CLI — clone repositories, create/list/merge pull requests, create/list issues, and run any other gh command (API calls, workflow runs, releases, repo administration). List operations return parsed JSON.
changelog-composer
Generates structured changelogs and release notes from git history and PRs, classifying breaking changes, features, fixes, performance, docs. Triggers on: "generate changelog", "write release notes", "what changed since", "prepare release", "release notes for", "diff since tag".
re0-merge
Review and land an external contribution the way this suite does: gate it against the thesis, land it with the author's credit intact, complete a new skill rather than merging it raw, then approve, credit, and explain before closing. Use when reviewing a pull request, as any collaborator or maintainer, not only the…