agentmods.dev

SubagentStop

A hook that runs a shell script when a subagent finishes its work. A subagent is a separate agent handling part of a larger task.

In plain words
What is it for?
Use it to trigger the project's subagent-finished processing after any subagent stops.
Why use it?
It allows the project to perform automatic cleanup or record-keeping when delegated work ends.

Hook

7 6d ago A scan tokens not measured original MIT
View the source file daveangulo/twining-mcp
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/daveangulo/twining-mcp/subagent-stop
Clone the repo
git clone --depth 1 https://github.com/daveangulo/twining-mcp
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 original No closer match found 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 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.

plugin/hooks/hooks.json · 14 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "bash \"${CLAUDE_PLUGIN_ROOT}/hooks/subagent-stop-hook.sh\"",
          "timeout": 10
        }
      ]
    }
  ]
}
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 · 14 lines scan A 8ad9e2371698

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository daveangulo/twining-mcp (7 stars, last pushed 6d 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agentsData and AIPlanningagent-coordinationai-agentsclaudeclaude-codedecision-trackingknowledge-graph
Related

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SubagentStop

Runs when a subagent finishes, executing subagent-stop.mjs via node. From M-T-D-N/agentmemory-codex-windows.

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SessionStart

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SessionStart

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SubagentStop

Runs when a subagent finishes, running an inline shell check. From ArdurAI/ardur.

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