PostToolUse

PostToolUse is a hook for Claude Code from kenshikobayashi/everything-claude-code-for-business. Its token cost is not measured, scanned A, original, MIT.

An automatic reminder that runs after a tool creates a Gmail draft or a Slack message draft. It prints a note telling you to review the draft before sending it yourself.

In plain words
What is it for?
Use it to add a post-tool notification for Gmail and Slack draft-creation calls.
Why use it?
It reduces the chance that a generated draft is mistaken for a sent message. The reminder makes the required manual review visible immediately after draft creation.

Hook for Claude Code

Written for Claude Code: PostToolUse hook event.

Part of the everything-claude-code-for-business plugin โ€” 24 skills, 13 agents, 4 hooks shipped together

One of 4 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 3 are separate, each on its own page.

Good fit Use it to add a post-tool notification for Gmail and Slack draft-creation calls.

Compare 6 hooks from other repositories โ†“
Install with agentmods
npx agentmods add hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use
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.

Clone the repo
git clone --depth 1 https://github.com/kenshikobayashi/everything-claude-code-for-business

Made for: Claude Code.

Or install everything-claude-code-for-business, the plugin that ships this one along with the rest of its 24 skills, 13 agents, 4 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 PostToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use/github.svg)](https://agentmods.dev/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use"><img src="https://agentmods.dev/badge/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80ร—15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80ร—15 button for PostToolUse

Your own site ยท 80ร—15
<a href="https://agentmods.dev/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use"><img src="https://agentmods.dev/badge/hooks/kenshikobayashi/everything-claude-code-for-business/post-tool-use.svg" alt="Reviewed on agentmods" width="80" 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 โ€” not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

PostToolUse scanned grade A with 0 findings against 26 rules in 11 categories โ€” prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency โ€” measured 9d 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 ยท 13 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "mcp__.*[Gg]mail.*create_draft|mcp__.*[Ss]lack.*send_message_draft",
      "hooks": [
        {
          "type": "command",
          "command": "echo '๐Ÿ“ Draft created. Review before sending manually.'"
        }
      ]
    }
  ]
}
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. 9d ago First seen ยท 13 lines scan A fe840a4ecb76

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository kenshikobayashi/everything-claude-code-for-business (2 stars, last pushed 3mo 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.