agentmods.dev

Stop

A Claude Code hook that runs after the agent finishes a response and checks it with a Python script.

In plain words
What is it for?
Use it as the finishing hook for exo’s response rules. The available description does not specify which problems the script detects.
Why use it?
It provides an automatic response check at the end of each turn.

Hook

1 1mo ago A scan tokens not measured original MIT
View the source file hseinmoussa/exo
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/hseinmoussa/exo/stop
Clone the repo
git clone --depth 1 https://github.com/hseinmoussa/exo
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 · 12 lines

What it actually says

{
  "Stop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"${CLAUDE_PLUGIN_ROOT}/hooks/lint_response.py\""
        }
      ]
    }
  ]
}
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. yesterday First seen · 12 lines scan A df9f76def395

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository hseinmoussa/exo (1 stars, last pushed 1mo 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.

Languagesaccessibilityaianthropicclaudeclaude-codeclaude-code-hooks
Related

Other hooks, from other repositories

Stop

Runs when the agent finishes a response, executing on-stop.sh. From amIT-nitb/claude-callout.

amIT-nitb/claude-callout · not measured

Notification

Runs when the agent sends a notification, executing on-notification.sh. From amIT-nitb/claude-callout.

amIT-nitb/claude-callout · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing on-prompt.sh. From amIT-nitb/claude-callout.

amIT-nitb/claude-callout · not measured

SessionStart

Runs when a session starts, executing on-session-start.sh. From amIT-nitb/claude-callout.

amIT-nitb/claude-callout · not measured

BeforeTool

Runs on the BeforeTool event for write_file and replace tool calls, executing enforce-edit-gate.py via python. From Community-Access/accessibility-agents.

Community-Access/accessibility-agents · not measured

SessionEnd

Runs when a session ends, executing session-end.py via python. From Community-Access/accessibility-agents.

Community-Access/accessibility-agents · not measured