A pre-action hook that runs a shell check before the agent makes a bash command.

Use it to print a notice before commands matched as bash_run are executed.

It provides a visible signal immediately before a shell command runs, making tool activity easier to track.

PreToolUse — Hook for coding agents by altaidevorg: A pre-action hook that runs a shell check before…

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/altaidevorg/altai-app/pre-tool-use

Clone the repo

git clone --depth 1 https://github.com/altaidevorg/altai-app

Or install altai-sample, the plugin that ships this one along with the rest of its 2 skills, 1 command, 1 agent, 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/altaidevorg/altai-app/pre-tool-use.svg)](https://agentmods.dev/hooks/altaidevorg/altai-app/pre-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/altaidevorg/altai-app/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/altaidevorg/altai-app/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 original 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 5d 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.

docs/sample-plugin/hooks/hooks.json · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "bash_run",
      "hooks": [
        {
          "type": "command",
          "command": "echo 'altai-sample: about to run a shell command' >&2"
        }
      ]
    }
  ]
}

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.

5d ago First seen · 13 lines scan A 10367eb5b673

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository altaidevorg/altai-app (2 stars, last pushed today), licensed Apache-2.0. 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.

Rust Writing and docs ai-agents developer-tools local-first tauri

PreToolUse

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

SubagentStop

PreToolUse

PreToolUse

PostToolUse

Stop

SessionStart