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.
npx agentmods add hooks/novasplace/csm/subagent-stopgit clone --depth 1 https://github.com/NovasPlace/CSMGrade 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 3d 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.
This is a copy
91% identical to PermissionRequest — 4 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.
What it actually says
{
"SubagentStop": [
{
"matcher": "*",
"hooks": [
{
"type": "command",
"command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/run-hook.mjs\"",
"timeout": 60
}
]
}
]
}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.
- 3d ago First seen · 14 lines scan A ceaa88c97f35
SubagentStop is a hook published in the GitHub repository NovasPlace/CSM (41 stars, last pushed 9d 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. It is 91% identical to PermissionRequest, differing in 4 lines, and is treated as a copy.
Other hooks, from other repositories
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, running an inline shell check. From coleam00/Archon.
Stop
Runs when the agent finishes a response, running an inline shell check. From coleam00/Archon.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, executing validate-bash.mjs via node. From fpindej/netrock.
Stop
Runs when the agent finishes a response, running an inline shell check. From ladiossoop5star/open_magi.
PreToolUse
Runs before the agent uses a tool for Write, Edit, MultiEdit and NotebookEdit tool calls, executing pre_snapshot.py via python3. From Yuno15-bb/c-brain.
Notification
Runs when the agent sends a notification for permission_prompt, idle_prompt and auth_success tool calls, running cas hook Notification. From codingagentsystem/cas.