PostToolUse

PostToolUse is a hook for Claude Code from NYCU-Chung/my-claude-devteam. Its token cost is not measured, scanned A, original, MIT.

A group of automatic checks that run after command-line, file-writing, or file-editing actions.

In plain words
What is it for?
Use it to automate checks during development, including error logging, command auditing, JavaScript and TypeScript formatting, and test runs.
Why use it?
It records errors and commands, formats changed code, checks types, runs related tests, and flags some quality issues. This helps catch problems soon after they are introduced.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: reads .claude/ paths.

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 my-claude-devteam plugin — 12 agents, 5 hooks shipped together

One of 5 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 4 are separate, each on its own page.

Good fit Use it to automate checks during development, including error logging, command auditing, JavaScript and TypeScript formatting, and test runs.

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 NYCU-Chung/my-claude-devteam
Claude Code
/plugin install my-claude-devteam

Made for: Claude Code.

Or install my-claude-devteam, the plugin that ships this one along with the rest of its 12 agents, 5 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/nycu-chung/my-claude-devteam/post-tool-use.svg)](https://agentmods.dev/hooks/nycu-chung/my-claude-devteam/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/nycu-chung/my-claude-devteam/post-tool-use"><img src="https://agentmods.dev/badge/hooks/nycu-chung/my-claude-devteam/post-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

PostToolUse 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 8d 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 · 46 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": ".*",
      "hooks": [
        {
          "type": "command",
          "command": "bash ${CLAUDE_PLUGIN_ROOT}/hooks/log-error.sh",
          "description": "Record errors to ~/.claude/error-log.md"
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/audit-log.js",
          "description": "Audit log all bash commands with auto-redaction"
        }
      ]
    },
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/accumulator.js",
          "description": "Accumulate edited JS/TS files for batch format at Stop"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/design-quality.js",
          "timeout": 10,
          "description": "Warn on generic template-looking frontend UI"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/test-runner.js",
          "timeout": 60,
          "description": "Run sibling test files and report failures"
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 5. 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. 8d ago First seen · 46 lines scan A abb805bb629c

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository NYCU-Chung/my-claude-devteam (269 stars, last pushed 4mo 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 2026-08-30.