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/friedbotstudio/baseline/post-tool-usegit clone --depth 1 https://github.com/friedbotstudio/baselineGrade A, and why
PostToolUse 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 yesterday.
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
47% identical to SessionStart — 25 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
{
"PostToolUse": [
{
"matcher": "Write|Edit|MultiEdit",
"hooks": [
{
"type": "command",
"command": "node $CLAUDE_PROJECT_DIR/.claude/hooks/lint_runner.mjs"
},
{
"type": "command",
"command": "node $CLAUDE_PROJECT_DIR/.claude/hooks/test_runner.mjs"
},
{
"type": "command",
"command": "node $CLAUDE_PROJECT_DIR/.claude/hooks/phase_timer.mjs"
}
]
},
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "node $CLAUDE_PROJECT_DIR/.claude/hooks/phase_timer.mjs"
}
]
}
]
}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.
- yesterday First seen · 30 lines scan A 5ba25e40b9f5
PostToolUse is a hook published in the GitHub repository friedbotstudio/baseline (11 stars, last pushed 5d 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. It is 47% identical to SessionStart, differing in 25 lines, and is treated as a copy.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool for Bash, Edit and Write tool calls, executing dangerous-actions-blocker.sh via bash. From FlorianBruniaux/claude-code-ultimate-guide.
SessionStart
Runs when a session starts, executing rtk-baseline.sh. From FlorianBruniaux/claude-code-ultimate-guide.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing clarify-first.sh and skill-chain-enforcer.sh via bash (2 commands). From mag123c/toktrack.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing collector-hook.js via node. From core0-io/nio.
TaskCreated
Runs on the TaskCreated event, executing collector-hook.js via node. From core0-io/nio.
SubagentStop
Runs when a subagent finishes, executing collector-hook.js via node. From core0-io/nio.