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/iroha924/mumei/stopgit clone --depth 1 https://github.com/iroha924/mumeiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/hooks/iroha924/mumei/stop)<a href="https://agentmods.dev/hooks/iroha924/mumei/stop"><img src="https://agentmods.dev/badge/hooks/iroha924/mumei/stop.svg" alt="Measured on agentmods" height="20"></a>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 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
63% identical to SessionStart — 14 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
{
"Stop": [
{
"hooks": [
{
"type": "command",
"command": "bash \"${CLAUDE_PLUGIN_ROOT}/hooks/stop-guard.sh\"",
"timeout": 15
},
{
"type": "command",
"command": "bash \"${CLAUDE_PLUGIN_ROOT}/hooks/stop-cost-backfill.sh\"",
"timeout": 15,
"async": true
}
]
}
]
}What else hooks.json configures
This page is one entry in a file that holds 18. Installing the file brings all of them; each is measured and scanned on its own page.
- Hook ConfigChange A not measured
- Hook CwdChanged A not measured
- Hook FileChanged A not measured
- Hook InstructionsLoaded A not measured
- Hook PostCompact A not measured
- Hook PostToolUse A not measured
- Hook PostToolUseFailure A not measured
- Hook PreCompact A not measured
- Hook PreToolUse A not measured
- Hook SessionEnd A not measured
- Hook SessionStart A not measured
- Hook SubagentStart A not measured
- Hook SubagentStop A not measured
- Hook TaskCompleted A not measured
- Hook TaskCreated A not measured
- Hook UserPromptExpansion A not measured
- Hook UserPromptSubmit A not measured
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 · 19 lines scan A 087dd8feae38
Stop is a hook published in the GitHub repository iroha924/mumei (2 stars, last pushed 3d 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 63% identical to SessionStart, differing in 14 lines, and is treated as a copy.
Other hooks, from other repositories
SubagentStart
Runs when a subagent starts for auto-harness:planner-clarify-agent, auto-harness:planner-clarify-parallel-agent, auto-harness:planner-spec-draft-agent, auto-harness:planner-spec-draft-parallel-agent, auto-harness:generator-draft-contract-agent, auto-harness:generator-draft-contract-parallel-agent…
PreToolUse
Runs before the agent uses a tool for Write, Edit and MultiEdit tool calls, executing root-guard.mjs via node. From redker56/auto-harness.
SessionStart
Runs when a session starts on startup, resume and compact, executing harness-hook.mjs via node. From redker56/auto-harness.
SessionStart
Runs when a session starts, executing session-start.sh. From agentis-tools/ctx.
PostToolUseFailure
Runs when a tool call fails, executing trail-enrich.sh. From AlexShchuka/neuro-matrix.
PreCompact
Runs before the context is compacted, executing harness-hook.mjs via node. From redker56/auto-harness.