agentmods.dev

Stop

A stop hook that runs a shell command when the coding agent finishes a response. The included command asks a local service to check whether the session should be reflected in memory.

In plain words
What is it for?
Use it to trigger a local memory-reflection check when a Claude Code session ends.
Why use it?
It automates an end-of-response check without requiring a person to run it. Errors do not stop the agent because the hook is set to continue when the command fails.

Hook

162 3mo ago B scan tokens not measured original Apache-2.0
View the source file iii-experimental/agentos
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/iii-experimental/agentos/stop
Clone the repo
git clone --depth 1 https://github.com/iii-experimental/agentos
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 B 2 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade B, and why

Stop scanned grade B with 2 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

"command": "curl -s -X POST http://localhost:3111/api/reflect/check -H 'Content-Type: application/json' -d '{\"agentId\":\"claude-code\",\"sessionId\":\"$SESSION_ID\",\"iterations\":5}'",

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

"command": "curl -s -X POST http://localhost:3111/api/reflect/check -H 'Content-Type: application/json' -d '{\"agentId\":\"claude-code\",\"sessionId\":\"$SESSION_ID\",\"iterations\":5}'",
plugin/hooks/hooks.json · 15 lines

What it actually says

{
  "Stop": [
    {
      "description": "Trigger memory reflection on session end",
      "hooks": [
        {
          "type": "command",
          "command": "curl -s -X POST http://localhost:3111/api/reflect/check -H 'Content-Type: application/json' -d '{\"agentId\":\"claude-code\",\"sessionId\":\"$SESSION_ID\",\"iterations\":5}'",
          "timeout": 5000,
          "continueOnError": true
        }
      ]
    }
  ]
}
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 · 15 lines scan B ed6ec314490b

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository iii-experimental/agentos (162 stars, last pushed 3mo 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 B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Data and AILLMLanguagesMemory and contextMulti-AgentOrchestrationagent-frameworkai-agentmcp
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts on startup, resume, clear and compact, executing host-notifications.mjs via node. From JiaWeiXie/swarm-pi-code-plugin.

JiaWeiXie/swarm-pi-code-plugin · not measured

Stop

Runs when the agent finishes a response, running claude-hook. From bobmatnyc/claude-mpm.

bobmatnyc/claude-mpm · not measured

SessionStart

Runs when a session starts, running claude-hook. From bobmatnyc/claude-mpm.

bobmatnyc/claude-mpm · not measured

PreToolUse

Runs before the agent uses a tool, running claude-hook. From bobmatnyc/claude-mpm.

bobmatnyc/claude-mpm · not measured

PostToolUse

Runs after a tool call finishes for Edit, Write and Bash tool calls, executing check_web_design_system.py, check_backend_regional_defaults.py, run_edit_time_gates.py, record_push_throttle.sh and rewarm_caches_after_sync.sh via python (5 commands). From Aureliolo/synthorg.

Aureliolo/synthorg · not measured

SessionStart

Runs when a session starts, executing session-start.mjs via node. From anilcancakir/claude-code-plugin.

anilcancakir/claude-code-plugin · not measured