A group of automatic commands that run after tool calls, especially after writing or editing files. They capture intent, reload changes, record an audit log, handle errors, escalate failures, and suggest compacting the session.

Running post-change logging, error handling, failure escalation, change watching, and session-maintenance tasks after agent tool use.

It records and checks what happens after changes are made, so errors, reloads, and follow-up actions are less likely to be overlooked.

PostToolUse — Hook by cookys

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/cookys/autopilot/post-tool-use

Clone the repo

git clone --depth 1 https://github.com/cookys/autopilot

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 55% 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

55% identical to SessionStart — 38 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 · 43 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": ".*",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/intent-capture.js"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/reload-watch.js"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/audit-log.js"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/log-error.js"
        },
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/failure-escalation.js"
        },
        {
          "//": "D6: PostToolUse opt-in multiplexer (context-budget, accumulator, test-runner, design-quality).",
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/opt-in-multiplexer.js PostToolUse"
        }
      ]
    },
    {
      "matcher": "Write|Edit",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/suggest-compact.js"
        }
      ]
    }
  ]
}

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.

2d ago First seen · 43 lines scan A 36bcc5ae9c2e

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository cookys/autopilot (11 stars, last pushed 3d 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 55% identical to SessionStart, differing in 38 lines, and is treated as a copy.

PostToolUse

Getting it into your agent

Grade A, and why

Nothing flagged

This is a copy

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

PostToolUse

SessionStart

SessionStart

PreToolUse

PreToolUse

SessionStart