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/ronmkr/promptbook/session-startgit clone --depth 1 https://github.com/ronmkr/PromptBookGrade 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 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.
What it actually says
{
"SessionStart": [
{
"hooks": [
{
"type": "command",
"command": "bash \"${GEMINI_PLUGIN_ROOT}/hooks/sg-python.sh\" \"${GEMINI_PLUGIN_ROOT}/hooks/ensure_agent_sdk.py\"",
"timeout": 180
}
]
}
]
}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.
- 2d ago First seen · 13 lines scan A b0a5fcbf9aa7
SessionStart is a hook published in the GitHub repository ronmkr/PromptBook (2 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 A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other hooks, from other repositories
SessionStart
Runs when a session starts, running bd prime --hook-json. From doublej/consult-user-mcp.
BeforeTool
Runs on the BeforeTool event, running npx -y cc-safety-net hook --gemini-cli. From kenryu42/gemini-safety-net.
PostToolUseFailure
Runs when a tool call fails, executing EventLogger.hook.ts and AlgorithmNudge.hook.ts (2 commands). From DorShaer/Husk.
PermissionRequest
Runs when the agent asks permission for an action for Write, Edit, MultiEdit, Bash and mcp__.* tool calls, executing Safety.hook.ts (2 commands). From DorShaer/Husk.
AfterAgent
Runs on the AfterAgent event, executing phase-gate.js and ralph-retry.js via node (2 commands). From richardcb/oh-my-gemini.
BeforeTool
Runs on the BeforeTool event for write_file, replace, run_shell_command and shell tool calls, executing before-tool.js via node. From richardcb/oh-my-gemini.