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/lindahaviv/second-brain/pre-tool-usegit clone --depth 1 https://github.com/LindaHaviv/second-brainWrote 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/lindahaviv/second-brain/pre-tool-use)<a href="https://agentmods.dev/hooks/lindahaviv/second-brain/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/lindahaviv/second-brain/pre-tool-use.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PreToolUse 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.
What it actually says
{
"PreToolUse": [
{
"matcher": "Write|Edit|MultiEdit|NotebookEdit",
"hooks": [
{
"type": "command",
"command": "python3 -c \"import json,sys,os; d=json.load(sys.stdin); p=str(d.get('tool_input',{}).get('file_path','')); b=os.path.basename(p); hit=(b.endswith('.env') or b.startswith('.env')) and not b.endswith('.env.example'); sys.exit(0) if not hit else (sys.stderr.write('BLOCKED by repo hook: '+p+' is a secrets file. Real values belong in the user-managed .env (never written by an agent, never committed); document new variables in oracle/.env.example instead.'), sys.exit(2))\""
}
]
}
]
}What else settings.json configures
This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.
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 · 13 lines scan A 8778b6ece22e
PreToolUse is a hook published in the GitHub repository LindaHaviv/second-brain (10 stars, last pushed 11d 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other hooks, from other repositories
PostToolUse
Runs after a tool call finishes for Bash tool calls, executing post-commit-repomix.sh via bash. From dcostenco/prism-coder.
SessionStart
Runs when a session starts, executing gsd-check-update.js and gsd-session-state.sh via node (2 commands). From mrboups/xbrain.
PostToolUse
Runs after a tool call finishes for Bash, Edit, Write, MultiEdit, Agent, Task, Read, Write and Edit tool calls, executing gsd-context-monitor.js, gsd-read-injection-scanner.js and gsd-phase-boundary.sh via node (3 commands). From mrboups/xbrain.
PreToolUse
Runs before the agent uses a tool for Write, Edit, Write, Edit, Write, Edit and Bash tool calls, executing gsd-prompt-guard.js, gsd-read-guard.js, gsd-workflow-guard.js and gsd-validate-commit.sh via node (4 commands). From mrboups/xbrain.
SessionStart
Runs when a session starts on startup and resume, executing deja.sh. From vshulcz/deja-vu.
SubagentStop
Runs when a subagent finishes, executing observe.sh via bash. From kage-core/Kage.