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SubagentStop

SubagentStop is a hook for Claude Code from pillip/claude-dev-kit. Its token cost is not measured, scanned A, a copy of SubagentStart, MIT.

A hook that runs a Python script when a subagent finishes its work.

In plain words
What is it for?
Use it to connect subagent completion events to the project's state-management script.
Why use it?
It lets the project update or record agent state automatically at the end of a subagent's task.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PLUGIN_ROOT variable.

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 claude-dev-kit plugin — 22 skills, 22 agents, 9 hooks shipped together

One of 9 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 8 are separate, each on its own page.

not rated 11repo 4d ago A scan tokens not measured copy · 98% MIT

Good fit Use it to connect subagent completion events to the project's state-management script.

Compare 6 hooks from other repositories ↓
View source ↗ pillip/claude-dev-kit
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 pillip/claude-dev-kit
Claude Code
/plugin install claude-dev-kit

Made for: Claude Code.

Or install claude-dev-kit, the plugin that ships this one along with the rest of its 22 skills, 22 agents, 9 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 SubagentStop

README.md
[![agentmods](https://agentmods.dev/badge/hooks/pillip/claude-dev-kit/subagent-stop/github.svg)](https://agentmods.dev/hooks/pillip/claude-dev-kit/subagent-stop)
Your own site
<a href="https://agentmods.dev/hooks/pillip/claude-dev-kit/subagent-stop"><img src="https://agentmods.dev/badge/hooks/pillip/claude-dev-kit/subagent-stop/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for SubagentStop

Your own site · 80×15
<a href="https://agentmods.dev/hooks/pillip/claude-dev-kit/subagent-stop"><img src="https://agentmods.dev/badge/hooks/pillip/claude-dev-kit/subagent-stop.svg" alt="Reviewed on agentmods" width="80" 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 98% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

SubagentStop 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 2mo 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

98% identical to SubagentStart — 2 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 · 13 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "bash -c '[ -f \"$CLAUDE_PLUGIN_ROOT/project/.claude/hooks/agent_state.py\" ] && HOOK_ROOT=\"$CLAUDE_PROJECT_DIR\" python3 \"$CLAUDE_PLUGIN_ROOT/project/.claude/hooks/agent_state.py\" || true'"
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 9. 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. 2mo ago First seen · 13 lines scan A c121a9c2ce05

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository pillip/claude-dev-kit (11 stars, last pushed 4d 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 98% identical to SubagentStart, differing in 2 lines, and is treated as a copy.

Claude CodeCode Generationai-agentsautonomous-codingclaudedeveloper-tools
Related

SubagentStop compared with hooks from other repositories

SubagentStop next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
SubagentStoppillip/claude-dev-kitHook114d agoMITA—Claude Code
Stopopenplanr/planr-pipelineHook21mo agoMITA—Claude Code
PostToolUsesupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartsupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109kyesterdayApache-2.0A—Claude Code
PreToolUseapache/supersetHook75kyesterdayApache-2.0A—Claude Code
PreToolUseanthropics/claude-cookbooksHook54k2d agoMITA—Claude Code