PreToolUse

PreToolUse is a hook for Claude Code from yaniv-golan/cc-telegram-plus. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A pre-action automation hook that runs shell commands before the coding agent uses tools, including when it asks a user a question.

In plain words
What is it for?
It is for running activity logging and question-redirection scripts at specific points in an agent session.
Why use it?
It can record activity and redirect questions through the supplied scripts before the agent continues. The input does not explain what those scripts do beyond that.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the telegram plugin — 2 skills, 4 hooks, 1 MCP server shipped together

One of 4 entries in hooks.json — they are configured in one file and arrive together.

Good fit It is for running activity logging and question-redirection scripts at specific points…

Compare 6 hooks from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add yaniv-golan/cc-telegram-plus
Claude Code
/plugin install telegram

Made for: Claude Code.

Or install telegram, the plugin that ships this one along with the rest of its 2 skills, 4 hooks, 1 MCP server.

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.

agentmods badge for PreToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/yaniv-golan/cc-telegram-plus/pre-tool-use.svg)](https://agentmods.dev/hooks/yaniv-golan/cc-telegram-plus/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/yaniv-golan/cc-telegram-plus/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/yaniv-golan/cc-telegram-plus/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. A grade says what 26 rules found in the file — not that it is safe.
Origin 59% copy Near-identical to another mod 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 6d 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.

Origin

This is a copy

59% identical to SessionStart — 19 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.

hooks/hooks.json · 24 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/hooks/activity.sh",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "AskUserQuestion",
      "hooks": [
        {
          "type": "command",
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/hooks/ask-redirect.sh",
          "timeout": 3600
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 4. Installing the file brings all of them; each is measured and scanned on its own page.

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. 6d ago First seen · 24 lines scan A 11b97a56fd1b

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository yaniv-golan/cc-telegram-plus (1 stars, last pushed 5mo ago), licensed MIT. 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. It is 59% identical to SessionStart, differing in 19 lines, and is treated as a copy.