agentmods.dev

Stop

A completion hook that runs a shell command when the coding agent finishes a response. A hook is an automatic action tied to a specific agent event.

In plain words
What is it for?
Use it to trigger the CIGAR check whenever the agent stops responding.
Why use it?
It automates a final check after each response, so the check does not depend on someone remembering to run it.

Hook

8 13d ago A scan tokens not measured copy · 94% Apache-2.0
View the source file hashgraph-online/hol-cigar
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/hashgraph-online/hol-cigar/stop
Clone the repo
git clone --depth 1 https://github.com/hashgraph-online/hol-cigar
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 94% copy Near-identical to another mod 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 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.

Origin

This is a copy

94% identical to SessionStart — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

adapters/claude-code/hooks/hooks.json · 20 lines

What it actually says

{
  "Stop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/bin/cigar-claude-hook",
          "args": [
            "run",
            "--plugin-root",
            "${CLAUDE_PLUGIN_ROOT}",
            "--plugin-data",
            "${CLAUDE_PLUGIN_DATA}"
          ],
          "timeout": 1
        }
      ]
    }
  ]
}
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 · 20 lines scan A 3907a1556257

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository hashgraph-online/hol-cigar (8 stars, last pushed 13d 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. It is 94% identical to SessionStart, differing in 2 lines, and is treated as a copy.

Memory and contextagent-runtimeagentic-aiagentic-workflowsai-agentsai-governancecontext-engineering
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, executing hook_session.py via python3. From ppgranger/token-saver.

ppgranger/token-saver · not measured

Stop

Runs when the agent finishes a response, executing slopcheck.py with --changed. From agentdecksdk/agentdeck.

agentdecksdk/agentdeck · not measured

Stop

Runs when the agent finishes a response, executing run.sh. From michalstrnadel/scorekeeper.

michalstrnadel/scorekeeper · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing collector-hook.js via node. From core0-io/nio.

core0-io/nio · not measured

TaskCreated

Runs on the TaskCreated event, executing collector-hook.js via node. From core0-io/nio.

core0-io/nio · not measured

SubagentStop

Runs when a subagent finishes, executing collector-hook.js via node. From core0-io/nio.

core0-io/nio · not measured