agentmods.dev

PostToolUse

A set of automatic actions that run after editing files or using specified memory tools. They execute scripts to process, verify, and record completed changes.

In plain words
What is it for?
Use it to run post-edit processing and verification after Edit, Write, or MultiEdit operations, and to mark certain memory-tool calls as used.
Why use it?
It reduces the need to remember follow-up checks and keeps code-memory records updated after changes.

Hook

6 1mo ago A scan tokens not measured copy · 64% MIT
View the source file marcodavidd020/cerebro-code-memory
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.

agentmods
npx agentmods add hooks/marcodavidd020/cerebro-code-memory/post-tool-use
Clone the repo
git clone --depth 1 https://github.com/marcodavidd020/cerebro-code-memory
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 64% copy Near-identical to another mod 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 2d 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.

Origin

This is a copy

64% identical to SessionStart — 21 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugin/hooks/hooks.json · 26 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Edit|Write|MultiEdit",
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/post_edit.py"
        },
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/verify-edit.py"
        }
      ]
    },
    {
      "matcher": "mcp__cerebro__.*",
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/cerebro-mark-used.py"
        }
      ]
    }
  ]
}
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. 2d ago First seen · 26 lines scan A a2d9a31ca9a0

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository marcodavidd020/cerebro-code-memory (6 stars, last pushed 1mo 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. It is 64% identical to SessionStart, differing in 21 lines, and is treated as a copy.

Memory and contextResearchaianthropicclaudeclaude-codecode-intelligencecode-search
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, executing install_engine.py via python3. From study8677/repobrain.

study8677/repobrain · not measured

PreToolUse

Runs before the agent uses a tool for Edit, Write and MultiEdit tool calls, executing brief-hook.sh via bash. From iliaal/codesage.

iliaal/codesage · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, executing rts-nudge.sh. From njfio/rs-agent-code-utility.

njfio/rs-agent-code-utility · not measured

PostToolUse

Runs after a tool call finishes for Write, Edit and MultiEdit tool calls, executing rts-verify.sh. From njfio/rs-agent-code-utility.

njfio/rs-agent-code-utility · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing inject_context.sh. From njfio/rs-agent-code-utility.

njfio/rs-agent-code-utility · not measured

SessionStart

Runs when a session starts, executing session_start.sh. From njfio/rs-agent-code-utility.

njfio/rs-agent-code-utility · not measured