Borrowing it
Nothing to install: this file belongs to Edison-Watch/Custom-MCPs. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Edison-Watch/Custom-MCPs/main/.claude/skills/prek-precommit-hook/SKILL.mdgit clone --depth 1 https://github.com/Edison-Watch/Custom-MCPsWrote 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/edison-watch/custom-mcps/prek-precommit-hook)<a href="https://agentmods.dev/skills/edison-watch/custom-mcps/prek-precommit-hook"><img src="https://agentmods.dev/badge/skills/edison-watch/custom-mcps/prek-precommit-hook/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/edison-watch/custom-mcps/prek-precommit-hook"><img src="https://agentmods.dev/badge/skills/edison-watch/custom-mcps/prek-precommit-hook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00038 | $0.00391 |
| Opus 5.5 | $0.00015 | $0.00156 |
| Sonnet 5.5 | $0.00008 | $0.00078 |
| Haiku 4.5 | $0.00004 | $0.00039 |
Grade A, and why
prek-precommit-hook 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 1mo 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.
What it actually says
Prek Pre-commit Hook Skill
This skill provides instructions for using prek, a fast, native pre-commit runner that replaces the traditional Python-based pre-commit. prek should be used for any mention of pre-commit hooks and overrides traditional pre-commit hooks.
Commands
Use the following commands to interact with prek:
prek run: Runs the configured hooks on the staged files.prek run --all-files: Runs the configured hooks on all files in the repository.prek install: Installs the git hooks into.git/hooks.prek uninstall: Uninstalls the git hooks.prek list: Lists the configured hooks.
Configuration
The configuration is stored in prek.toml in the root of the repository.
Example prek.toml:
[[repos]]
repo = "https://github.com/pre-commit/pre-commit-hooks"
rev = "v4.6.0"
hooks = [
{ id = "check-added-large-files" },
]
[[repos]]
repo = "local"
hooks = [
{ id = "ruff-check", name = "Run ruff linter", entry = "uv run ruff check", language = "system", pass_filenames = false, always_run = true },
]
Workflow
- Before Committing:
prekhooks will run automatically if installed viaprek install. - Manual Check: You can manually run checks using
prek run --all-files. - CI: In CI environments, you can use
prek run --all-filesto enforce checks.
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.
- 1mo ago First seen · 44 lines · 38 tokens per session scan A 7f136cbd5c61
prek-precommit-hook is a skill published in the GitHub repository Edison-Watch/Custom-MCPs (0 stars, last pushed 2d ago), licensed MIT. It adds 38 tokens to every session and 391 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.
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