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/modu-ai/moai-adk/session-startgit clone --depth 1 https://github.com/modu-ai/moai-adkWrote 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/modu-ai/moai-adk/session-start)<a href="https://agentmods.dev/hooks/modu-ai/moai-adk/session-start"><img src="https://agentmods.dev/badge/hooks/modu-ai/moai-adk/session-start.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
SessionStart 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 4d 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.
Copies of this mod
8 near-identical copies found in the catalogue:
- SubagentStart — 91% identical, 7 lines differ
- TaskCompleted — 91% identical, 7 lines differ
- InstructionsLoaded — 91% identical, 10 lines differ
- CwdChanged — 89% identical, 7 lines differ
- Stop — 89% identical, 81 lines differ
- SubagentStop — 89% identical, 18 lines differ
- UserPromptSubmit — 88% identical, 18 lines differ
- FileChanged — 88% identical, 10 lines differ
What it actually says
{
"SessionStart": [
{
"matcher": "startup|resume|clear|compact|fork",
"hooks": [
{
"command": "bash",
"args": [
"-c",
"[ -f \"$0\" ] && exec bash \"$0\"; d=\"${0%/.claude/hooks/moai/*}\"; mkdir -p \"$d/.moai/logs\" 2>/dev/null; printf \"%s %s\\n\" \"$(date -u +%FT%TZ)\" \"hook missing: $0\" >> \"$d/.moai/logs/hook-missing.log\" 2>/dev/null; exit 0",
"${CLAUDE_PROJECT_DIR}/.claude/hooks/moai/handle-session-start.sh"
],
"timeout": 30,
"type": "command"
}
]
}
]
}What else settings.json configures
This page is one entry in a file that holds 21. Installing the file brings all of them; each is measured and scanned on its own page.
- Settings file moai-adk D not measured
- Hook ConfigChange A not measured
- Hook CwdChanged A not measured
- Hook FileChanged A not measured
- Hook InstructionsLoaded A not measured
- Hook PermissionDenied A not measured
- Hook PermissionRequest 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 Stop A not measured
- Hook StopFailure A not measured
- Hook SubagentStart A not measured
- Hook SubagentStop A not measured
- Hook TaskCompleted A not measured
- Hook TeammateIdle 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.
- 4d ago First seen · 19 lines scan A e76b52a14d46
SessionStart is a hook published in the GitHub repository modu-ai/moai-adk (1,197 stars, last pushed today), 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool, executing hooks.py via python3. From shanraisshan/claude-code-best-practice.
Setup
Runs once when the project is set up, executing hooks.py via python3. From shanraisshan/claude-code-best-practice.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing hooks.py via python3. From shanraisshan/shanraisshan.
SubagentStart
Runs when a subagent starts, executing hooks.py via python3. From shanraisshan/shanraisshan.
SubagentStop
Runs when a subagent finishes, executing hooks.py via python3. From shanraisshan/shanraisshan.
TeammateIdle
Runs on the TeammateIdle event, executing hooks.py via python3. From shanraisshan/shanraisshan.