PreToolUse

PreToolUse is a hook for Claude Code from culminationAI/claude-sounds. Its token cost is not measured, scanned A, original, MIT.

A set of automatic actions that plays a sound before the coding agent reads, changes, runs, or fetches something. Different sounds are selected for file operations, shell commands, and web activity.

In plain words
What is it for?
Use it to hear when the agent is about to read or edit files, run shell commands, search the web, or fetch web pages.
Why use it?
It gives an audible signal about what the agent is about to do, so you do not have to watch every tool call on screen.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable.

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 claude-sounds plugin — 6 hooks shipped together

One of 6 entries in hooks.json — they are configured in one file and arrive together.

Good fit Use it to hear when the agent is about to read or…

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 culminationAI/claude-sounds
Claude Code
/plugin install claude-sounds

Made for: Claude Code.

Or install claude-sounds, the plugin that ships this one along with the rest of its 6 hooks.

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/culminationai/claude-sounds/pre-tool-use.svg)](https://agentmods.dev/hooks/culminationai/claude-sounds/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/culminationai/claude-sounds/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/culminationai/claude-sounds/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 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 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.

hooks/hooks.json · 49 lines

What it actually says

{
  "PreToolUse": [
    {
      "hooks": [
        {
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/play.sh 'write-*.mp3'",
          "type": "command"
        }
      ],
      "matcher": "^(Write|Edit)$"
    },
    {
      "hooks": [
        {
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/play.sh 'read-*.mp3'",
          "type": "command"
        }
      ],
      "matcher": "^(Read|Grep|Glob)$"
    },
    {
      "hooks": [
        {
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/play.sh 'bash-pre-*.mp3'",
          "type": "command"
        }
      ],
      "matcher": "^Bash$"
    },
    {
      "hooks": [
        {
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/play.sh 'web-search-*.mp3'",
          "type": "command"
        }
      ],
      "matcher": "^WebSearch$"
    },
    {
      "hooks": [
        {
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/scripts/play.sh 'web-fetch-*.mp3'",
          "type": "command"
        }
      ],
      "matcher": "^WebFetch$"
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 6. 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 · 49 lines scan A f46abddd2fe0

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository culminationAI/claude-sounds (2 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.