An end-of-response hook that runs the mstack stop command when the coding agent finishes a response. A hook is an automatic action connected to an agent event.

It is for running the mstack gate after every response. The input does not specify which project checks that gate performs.

It adds a fast project check at the end of each turn and provides extra context for the next step without stopping the agent with a hook error.

Stop — Hook by romerma

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/romerma/mstack/stop

Clone the repo

git clone --depth 1 https://github.com/romerma/mstack

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 yesterday.

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 · 19 lines

What it actually says

{
  "Stop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/bin/mstack",
          "args": [
            "hook",
            "stop"
          ],
          "timeout": 20,
          "statusMessage": "Running the mstack gate",
          "description": "Run the fast gate before the turn ends. Returns additionalContext rather than decision:block, which keeps the same loop protection without raising a hook error or burning the eight-consecutive-block budget."
        }
      ]
    }
  ]
}

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.

yesterday First seen · 19 lines scan A cdd4bcb86663

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository romerma/mstack (1 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 2026-08-31.

Code review Planning agent-workflows claude-code claude-code-plugin spec-driven-development

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

PostToolUse

UserPromptSubmit

SessionEnd

SessionEnd

Stop

SessionStart