SubagentStop

SubagentStop is a hook for Claude Code from mjmorales/claude-prove. Its token cost is not measured, scanned A, a copy of Stop, MIT.

A set of automatic actions that run when a subagent finishes. A subagent is a smaller coding agent assigned part of a larger task.

In plain words
What is it for?
Use it to capture subagent state and trigger project coordination steps after a general-purpose subagent stops.
Why use it?
It lets the project record the finished subagent work and run team follow-up actions without relying on manual cleanup.

Hook for Claude Code

Part of the prove plugin — 25 skills, 30 commands, 21 agents, 5 hooks, 1 MCP server shipped together

One of 6 entries in settings.json — they are configured in one file and arrive together.

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/mjmorales/claude-prove/subagent-stop
Clone the repo
git clone --depth 1 https://github.com/mjmorales/claude-prove

Made for: Claude Code.

Or install prove, the plugin that ships this one along with the rest of its 25 skills, 30 commands, 21 agents, 5 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/mjmorales/claude-prove/subagent-stop.svg)](https://agentmods.dev/hooks/mjmorales/claude-prove/subagent-stop)
Your own site
<a href="https://agentmods.dev/hooks/mjmorales/claude-prove/subagent-stop"><img src="https://agentmods.dev/badge/hooks/mjmorales/claude-prove/subagent-stop.svg" alt="Measured on agentmods" 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. Scan, not verified.
Origin 91% 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 5d 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

91% identical to Stop — 8 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.

.claude/settings.json · 26 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "general-purpose",
      "hooks": [
        {
          "type": "command",
          "command": "bun run \"${CLAUDE_PROVE_PLUGIN_DIR:-$HOME/.claude/plugins/prove}/packages/cli/bin/run.ts\" run-state hook subagent-stop",
          "timeout": 5000
        }
      ],
      "_tool": "run_state"
    },
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "bun run \"${CLAUDE_PROVE_PLUGIN_DIR:-$HOME/.claude/plugins/prove}/packages/cli/bin/run.ts\" scrum hook subagent-stop",
          "timeout": 20000
        }
      ],
      "_tool": "scrum"
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 6. 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. 5d ago First seen · 26 lines scan A 2de682e1a1ba

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository mjmorales/claude-prove (2 stars, last pushed 25d 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 91% identical to Stop, differing in 8 lines, and is treated as a copy.