PostToolUse

PostToolUse is a hook for coding agents from xiaobei930/cc-best. Its token cost is not measured, scanned A, original, MIT.

A set of checks that run after the agent finishes file edits or commands. They can format changed files, archive an oversized progress file, record tool-use patterns, suggest shorter context, check console logs, and check TypeScript.

In plain words
What is it for?
Use it to format edited files, monitor progress-file size, record observations for later learning, flag excessive context, detect console logs, and run TypeScript checks.
Why use it?
It catches common cleanup and quality issues after changes are made, without requiring each follow-up check to be remembered manually.

Hook

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 cc-best plugin — 3 skills, 44 commands, 8 agents, 20 hooks shipped together

One of 20 entries in hooks.json — they are configured in one file and arrive together.

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 xiaobei930/cc-best
Claude Code
/plugin install cc-best

Or install cc-best, the plugin that ships this one along with the rest of its 3 skills, 44 commands, 8 agents, 20 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/xiaobei930/cc-best/post-tool-use.svg)](https://agentmods.dev/hooks/xiaobei930/cc-best/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/xiaobei930/cc-best/post-tool-use"><img src="https://agentmods.dev/badge/hooks/xiaobei930/cc-best/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. Scan, not verified.
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 4d 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 · 72 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/format-file.js\"",
          "timeout": 60,
          "statusMessage": "格式化代码..."
        }
      ],
      "description": "自动格式化: 文件写入后自动格式化代码"
    },
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/auto-archive.js\"",
          "timeout": 5
        }
      ],
      "description": "自动归档: progress.md 超过 300 行时提醒归档"
    },
    {
      "matcher": "Write|Edit|Bash",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/observe-patterns.js\"",
          "timeout": 3
        }
      ],
      "description": "模式观察: 追踪工具调用模式,写入 memory-bank/observations.jsonl 供 /learn 消费"
    },
    {
      "matcher": ".*",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/suggest-compact.js\"",
          "timeout": 3
        }
      ],
      "description": "压缩提醒: 工具调用达到阈值时提醒压缩上下文 (官方 auto-compact bug 的 workaround)"
    },
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/check-console-log.js\"",
          "timeout": 3
        }
      ],
      "description": "调试日志检查: 检查 JS/TS 文件中的 console.log 语句"
    },
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/typescript-check.js\"",
          "timeout": 30,
          "statusMessage": "TypeScript 类型检查..."
        }
      ],
      "description": "TypeScript 类型检查: .ts 文件编辑后运行 tsc --noEmit"
    }
  ]
}
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. 4d ago First seen · 72 lines scan A add45c0c64ec

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository xiaobei930/cc-best (50 stars, last pushed 2mo 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.