SubagentStop

SubagentStop is a hook for Claude Code from Yeachan-Heo/oh-my-claudecode. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A stop hook that runs two Node.js commands whenever a subagent finishes. A hook is an automatic action triggered by an event.

In plain words
What is it for?
Tracking subagent completion and verifying deliverables after a subagent exits.
Why use it?
It records that the subagent stopped and runs checks on the work produced at that point.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PLUGIN_ROOT variable. Also seen: mentions subagents.

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 oh-my-claudecode plugin — 37 skills, 21 commands, 19 agents, 11 hooks, 1 MCP server shipped together

One of 11 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 10 are separate, each on its own page.

Good fit Tracking subagent completion and verifying deliverables after a subagent exits.

Compare 6 hooks from other repositories ↓
About the project

Oh My Claude Code is a multi-agent orchestration system for Claude Code, coordinating specialized agents, commands, skills, hooks, and workflows. It is designed for developers who want Claude Code to handle coding tasks through coordinated agent roles. Catalogue entries are components of its Claude Code workflow, including agents, commands, skills, hooks, instructions, MCP configuration, and a plugin.

Yeachan-Heo/oh-my-claudecode · 39,049 stars · on GitHub · oh-my-claudecode.dev

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 Yeachan-Heo/oh-my-claudecode
Claude Code
/plugin install oh-my-claudecode

Made for: Claude Code.

Or install oh-my-claudecode, the plugin that ships this one along with the rest of its 37 skills, 21 commands, 19 agents, 11 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 SubagentStop

README.md
[![agentmods](https://agentmods.dev/badge/hooks/yeachan-heo/oh-my-claudecode/subagent-stop/github.svg)](https://agentmods.dev/hooks/yeachan-heo/oh-my-claudecode/subagent-stop)
Your own site
<a href="https://agentmods.dev/hooks/yeachan-heo/oh-my-claudecode/subagent-stop"><img src="https://agentmods.dev/badge/hooks/yeachan-heo/oh-my-claudecode/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/yeachan-heo/oh-my-claudecode/subagent-stop"><img src="https://agentmods.dev/badge/hooks/yeachan-heo/oh-my-claudecode/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 81% 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 9d 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

81% identical to SessionStart — 31 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 · 19 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "node \"$CLAUDE_PLUGIN_ROOT\"/scripts/run.cjs \"$CLAUDE_PLUGIN_ROOT\"/scripts/subagent-tracker.mjs stop",
          "timeout": 5
        },
        {
          "type": "command",
          "command": "node \"$CLAUDE_PLUGIN_ROOT\"/scripts/run.cjs \"$CLAUDE_PLUGIN_ROOT\"/scripts/verify-deliverables.mjs",
          "timeout": 5
        }
      ]
    }
  ]
}
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. 9d ago First seen · 19 lines scan A fd34417516d7

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository Yeachan-Heo/oh-my-claudecode (39,049 stars, last pushed yesterday), 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 81% identical to SessionStart, differing in 31 lines, and is treated as a copy.