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opus-fable-playbook: Hook for Claude Code

.claude/settings.json

SubagentStop is a hook for Claude Code from rennf93/opus-fable-playbook. Its token cost is not measured, scanned A, original, MIT.

A stop hook that runs a shell script when a subagent finishes. A subagent is a smaller agent handling part of a larger task.

In plain words
What is it for?
Use it to run stop-gate.sh after a subagent completes.
Why use it?
It lets the project apply an automatic check or gate whenever delegated work ends.

Hook for Claude Code

Written for Claude Code: SubagentStop hook event. Also seen: mentions subagents.

This is rennf93/opus-fable-playbook's own configuration. It tells Claude Code how to work on opus-fable-playbook itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything opus-fable-playbook configures →

Part of the fable-mode plugin — 3 skills, 2 commands, 1 agent, 10 hooks shipped together

One of 10 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 9 are separate, each on its own page.

not rated 34repo changed 8d ago A scan tokens not measured original MIT
View source ↗ rennf93/opus-fable-playbook
Reuse

Borrowing it

Nothing to install: this file belongs to rennf93/opus-fable-playbook. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/rennf93/opus-fable-playbook/master/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/rennf93/opus-fable-playbook

Made for: Claude Code.

Or install fable-mode, the plugin that ships this one along with the rest of its 3 skills, 2 commands, 1 agent, 10 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/rennf93/opus-fable-playbook/subagent-stop/github.svg)](https://agentmods.dev/hooks/rennf93/opus-fable-playbook/subagent-stop)
Your own site
<a href="https://agentmods.dev/hooks/rennf93/opus-fable-playbook/subagent-stop"><img src="https://agentmods.dev/badge/hooks/rennf93/opus-fable-playbook/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/rennf93/opus-fable-playbook/subagent-stop"><img src="https://agentmods.dev/badge/hooks/rennf93/opus-fable-playbook/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 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 8d 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.

.claude/settings.json · 14 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "sh -c 'if ! command -v entire >/dev/null 2>&1; then exit 0; fi; exec entire hooks claude-code subagent-stop'",
          "timeout": 120
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 10. 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. 8d ago Changed · +2 lines 3275c0995902
  2. 2mo ago First seen · 12 lines scan A b921b5d63aee

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository rennf93/opus-fable-playbook (34 stars, last pushed 8d 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 2026-08-30.

Claude Codeanthropicclaudeclaude-code-pluginevalshooks
Related

SubagentStop compared with hooks from other repositories

SubagentStop next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
SubagentStoprennf93/opus-fable-playbookHook348d agoMITA—Claude Code
Stopdbc-oduffy/coordinator-claudeHook54d agononeA—Claude Code
TaskCompletedNova-Violet-Role/RoT-DTD-GOALHook22mo agononeA—Claude Code
PermissionRequestNova-Violet-Role/RoT-DTD-GOALHook22mo agononeA—Claude Code
ConfigChangeNova-Violet-Role/RoT-DTD-GOALHook22mo agononeA—Claude Code
PostToolUsesupabase/supabaseHook115ktodayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109ktodayApache-2.0A—Claude Code