A pre-tool hook that runs selected checks before the agent uses tools for editing files, running commands, or related actions. The listed checks block Unicode dashes, co-author lines, Git stashes, bypassed verification, temporary files, and certain typography.

It is for checking file edits and shell commands before execution, including Write, Edit, MultiEdit, and Bash actions.

It catches specified patterns before tool actions proceed, helping enforce the project's editing and command rules.

PreToolUse — Hook for coding agents by joryeugene: A pre-tool hook that runs selected checks before the…

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 hooks/joryeugene/tripod/pre-tool-use

Clone the repo

git clone --depth 1 https://github.com/joryeugene/tripod

Or install tripod, the plugin that ships this one along with the rest of its 25 skills, 1 hook.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/joryeugene/tripod/pre-tool-use.svg)](https://agentmods.dev/hooks/joryeugene/tripod/pre-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/joryeugene/tripod/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/joryeugene/tripod/pre-tool-use.svg" alt="Measured on agentmods" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin unknown No closer match found in the catalogue.

Security

Grade A, and why

PreToolUse 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 3d ago.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

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.

hooks/hooks.json · 67 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

3d ago First seen · 67 lines scan A 0005eaf87a71

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository joryeugene/tripod (2 stars, last pushed 4d ago), with no licence file. Its token cost is not measured: a hook is shell that never enters the context. 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.

Data and AI Git and workflow ai ai-engineering anthropic claude claude-code claude-code-plugin

PreToolUse

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

The source is not reproduced here

No licence file

What this file has done since we first saw it

Other hooks, from other repositories

PostCompact

SessionStart

Stop

SessionStart

Notification

Stop