A stop hook is an automatic command that runs when an agent finishes a response. This one watches for executor results or work committed while the lead session is idle, then can wake the lead for review.

It is for monitoring the end of responses, notifying the lead when an executor finishes or work was committed, and requesting a human-directed review.

It helps the lead session notice completed delegated work instead of missing updates while idle. The hook tells the lead to show the details and wait for direction.

Stop — Hook by spacegrowth

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/spacegrowth/claude-relay/stop

Clone the repo

git clone --depth 1 https://github.com/spacegrowth/claude-relay

Or install relay, the plugin that ships this one along with the rest of its 17 skills, 1 agent, 4 hooks.

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

Stop 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.

hooks/hooks.json · 16 lines

What it actually says

{
  "Stop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/stop_lead_watch.py",
          "asyncRewake": true,
          "timeout": 1900,
          "rewakeMessage": "🚦 [relay] — review needed: an executor finished or you committed work while idle. Open your reply with the marker '🚦 [relay] — review needed:', surface the details below to the user, and wait for their direction — do not auto-review or auto-commit:",
          "rewakeSummary": "🚦 [relay] — an executor finished while you were idle (details next)"
        }
      ]
    }
  ]
}

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 · 16 lines scan A c553db512cea

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository spacegrowth/claude-relay (1 stars, last pushed 11d 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.

Multi-Agent Orchestration claude-code claude-code-plugin iterm2 macos

Stop

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

Notification

PostToolUseFailure

PreToolUse

SessionStart

PreToolUse

SessionStart