agentmods.dev

PostToolUse

A set of post-tool hooks that runs checks after planning, shell commands, or file edits, including supervision, command safeguards, verification, and commit review.

In plain words
What is it for?
Use it to monitor plans and tool use, protect shell operations, verify command results, and review edits before they are committed.
Why use it?
It adds automatic checks around common agent actions, helping catch unsafe commands, unverified results, and changes that do not meet the project’s rules.

Hook

2 8d ago A scan tokens not measured copy · 88% MIT
View the source file joymin5655/Agent
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/joymin5655/agent/post-tool-use
Clone the repo
git clone --depth 1 https://github.com/joymin5655/Agent
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 88% 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

88% identical to SessionStart — 36 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.

hooks/hooks.json · 47 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "ExitPlanMode|Task|Agent",
      "hooks": [
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" plan-gate.py"
        },
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" supervisor.py"
        },
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" model-routing-observer.py"
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" circuit-breaker.py"
        },
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" verify-observer.py"
        },
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" rubric-commit-judge.sh"
        }
      ]
    },
    {
      "matcher": "Write|Edit|MultiEdit",
      "hooks": [
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/adapters/claude-code/adapter.sh\" r4-file-mutex-register.sh"
        }
      ]
    }
  ]
}
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 · 47 lines scan A a8eb065364f6

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository joymin5655/Agent (2 stars, last pushed 8d 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 88% identical to SessionStart, differing in 36 lines, and is treated as a copy.

LLMagent-infrastructureai-agentsclaude-codedevtoolspolicy-as-code
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Edit, Write, Read and Bash tool calls, executing block-dist.sh, enforce-bun.sh and no-truncated-schema-proof.sh via bash with --show-toplevel (3 commands). From lobu-ai/lobu.

lobu-ai/lobu · not measured

SessionStart

Runs when a session starts on startup, resume and compact, executing session-start.sh via bash (3 commands). From JKHeadley/instar.

JKHeadley/instar · not measured

Stop

Runs when the agent finishes a response, executing stop_report_hook.sh, tmux_signal_stop_receipt.sh and session_stop_rotation.py via bash with --show-toplevel (3 commands). From Vinix24/vnx-orchestration.

Vinix24/vnx-orchestration · not measured

SessionStart

Runs when a session starts on startup and resume, executing goalflight-session-start-watchdog.sh. From simonrowland/goal-flight.

simonrowland/goal-flight · not measured

PostToolUse

Runs after a tool call finishes, executing pii_checker_hook.py and observability_hook.py via python3 (2 commands). From alibaba/anolisa.

alibaba/anolisa · not measured

WorktreeCreate

Runs when a git worktree is created, executing hook-event-reporter.js via node. From JKHeadley/instar.

JKHeadley/instar · not measured