PostToolUse

PostToolUse is a hook for Claude Code from hj1105/kontext-brain-ts. Its token cost is not measured, scanned A, original, Apache-2.0.

A post-action hook that runs after patch or shell tool calls finish. It observes the resulting workspace changes and reconciles them with stored context.

In plain words
What is it for?
Tracking workspace changes made by patching or shell commands after tool execution.
Why use it?
It records or checks changes after they happen, helping keep project context aligned with the files the agent changed.

Hook for Claude Code

Written for Claude Code: PostToolUse hook event.

Part of the kontext-brain plugin — 1 skill, 3 hooks, 1 MCP server shipped together

One of 3 entries in hooks.json — they are configured in one file and arrive together.

Good fit Tracking workspace changes made by patching or shell commands after tool execution.

Compare 6 hooks from other repositories ↓
Install with agentmods
npx agentmods add hooks/hj1105/kontext-brain-ts/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/hj1105/kontext-brain-ts

Made for: Claude Code.

Or install kontext-brain, the plugin that ships this one along with the rest of its 1 skill, 3 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 PostToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/hj1105/kontext-brain-ts/post-tool-use.svg)](https://agentmods.dev/hooks/hj1105/kontext-brain-ts/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/hj1105/kontext-brain-ts/post-tool-use"><img src="https://agentmods.dev/badge/hooks/hj1105/kontext-brain-ts/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 3d 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.

plugins/kontext-brain/hooks/hooks.json · 15 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "^(apply_patch|Bash)$",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${PLUGIN_ROOT}/server.mjs\" --observe-write-hook",
          "timeout": 60,
          "statusMessage": "Reconciling observed workspace changes"
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 3. 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. 3d ago First seen · 15 lines scan A 04b29393b7b7

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository hj1105/kontext-brain-ts (22 stars, last pushed 3d ago), licensed Apache-2.0. 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 2026-09-04.