SubagentStop

A pair of automatic checks that run when specified review subagents finish. The checks validate review results and track whether required review gates have been passed.

In plain words
What is it for?
It helps enforce completion checks for specification review, code-quality review, and test-running subagents.
Why use it?
Review workflows can fail when a result is missing, malformed, or not recorded consistently. These checks catch those process problems after a review completes.

Hook for Claude Code

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/aram-devdocs/plumb/subagent-stop
Clone the repo
git clone --depth 1 https://github.com/aram-devdocs/plumb

Made for: Claude Code.

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.

.claude/settings.json · 17 lines

What it actually says

{
  "SubagentStop": [
    {
      "matcher": "(02-spec-reviewer|03-code-quality-reviewer|04-test-runner)",
      "hooks": [
        {
          "type": "command",
          "command": "bash .claude/hooks/review-verdict-validator.sh"
        },
        {
          "type": "command",
          "command": "bash .claude/hooks/review-gate-tracker.sh"
        }
      ]
    }
  ]
}
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 · 17 lines scan A 42cb54e7ef4b

Subscribe to this mod's changes

SubagentStop is a hook published in the GitHub repository aram-devdocs/plumb (2 stars, last pushed 1mo ago), licensed Apache-2.0. 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.