It can verify the environment or command setup immediately after delegated work ends, instead of relying on a later manual check.

SubagentStop — Hook for Claude Code by intentdriven/abcd

SubagentStop

SubagentStop is a hook for Claude Code from intentdriven/abcd. Its token cost is not measured, scanned A, original, MIT.

A completion hook that runs a shell check when a subagent—an AI worker handling part of a task—finishes.

In plain words

What is it for?: It is for running the provided inline `abcd` check after subagents stop. The check also examines how that command was found and whether its location has basic safety concerns.
Why use it?: It can verify the environment or command setup immediately after delegated work ends, instead of relying on a later manual check.

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 abcd plugin — 39 commands, 22 agents, 10 hooks shipped together

One of 9 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 8 are separate, each on its own page.

Good fit It is for running the provided inline abcd check after subagents stop. The check also examines how that command was found and whether its location has basic safety concerns.

Compare 6 hooks from other repositories ↓

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 intentdriven/abcd

Claude Code

/plugin install abcd

Made for: Claude Code.

Or install abcd, the plugin that ships this one along with the rest of its 39 commands, 22 agents, 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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/intentdriven/abcd/subagent-stop/github.svg)](https://agentmods.dev/hooks/intentdriven/abcd/subagent-stop)

Your own site

<a href="https://agentmods.dev/hooks/intentdriven/abcd/subagent-stop"><img src="https://agentmods.dev/badge/hooks/intentdriven/abcd/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.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/intentdriven/abcd/subagent-stop"><img src="https://agentmods.dev/badge/hooks/intentdriven/abcd/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 29d 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 · 12 lines

What it actually says

{
  "SubagentStop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "sh \"${CLAUDE_PLUGIN_ROOT}/hooks/subagent-stop.sh\""
        }
      ]
    }
  ]
}

Same file

What else `hooks.json` configures

This page is one entry in a file that holds 9. 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.

29d ago Changed b6cb6464fd4c
1mo ago Changed 69f2b35b4c27
1mo ago Changed cb004b79bc9e
1mo ago Changed 58b4f55cc3b4
1mo ago First seen · 12 lines scan A 183a901e3581

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository intentdriven/abcd (4 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-17.

Debugging Security agentic-ai agentic-framework agentic-workflow cli-tool

SubagentStop next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
SubagentStopintentdriven/abcd	Hook	4	yesterday	MIT	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	today	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	today	Apache-2.0	A	—	Claude Code
PreToolUseanthropics/claude-cookbooks	Hook	54k	2d ago	MIT	A	—	Claude Code
PostToolUseanthropics/claude-plugins-official	Hook	46k	yesterday	Apache-2.0	A	—	Claude Code