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/cfrs2005/claude-init/pre-tool-usegit clone --depth 1 https://github.com/cfrs2005/claude-initGrade 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 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.
How it starts
The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
{
"PreToolUse": [
{
"matcher": "tool == \"Bash\" && tool_input.command matches \"(npm run dev|pnpm( run)? dev|yarn dev|bun run dev)\"",
"hooks": [
{
"type": "command",
"command": "#!/bin/bash\ninput=$(cat)\ncmd=$(echo \"$input\" | jq -r '.tool_input.command // \"\"')\n\n# Block dev servers that aren't run in tmux\necho '[Hook] 已拦截: 开发服务器必须在 tmux 中运行以确保日志访问' >&2\necho '[Hook] 请改用此命令:' >&2\necho \"[Hook] tmux new-session -d -s dev 'npm run dev'\" >&2\necho '[Hook] 然后: tmux attach -t dev' >&2\nexit 1"
}
],
"description": "拦截 tmux 外的开发服务器 - 确保你可以访问日志"
},
{
"matcher": "tool == \"Bash\" && tool_input.command matches \"(npm (install|test)|pnpm (install|test)|yarn (install|test)|bun (install|test)|cargo build|make|docker|pytest|vitest|playwright)\"",
"hooks": [
{
"type": "command",
"command": "#!/bin/bash\ninput=$(cat)\nif [ -z \"$TMUX\" ]; then\n echo '[Hook] 建议在 tmux 中运行以确保持久化' >&2\n echo '[Hook] tmux new -s dev | tmux attach -t dev' >&2\nfi\necho \"$input\""
}
],
"description": "提醒对长时间运行的命令使用 tmux"
},
{
"matcher": "tool == \"Bash\" && tool_input.command matches \"git push\"",
"hooks": [
{
"type": "command",
"command": "#!/bin/bash\n# Open editor for review before pushing\necho '[Hook] 推送前请审查变更...' >&2\n# 取消注释你偏好的编辑器:\n# zed . 2>/dev/null\n# code . 2>/dev/null\n# cursor . 2>/dev/null\necho '[Hook] 按 Enter 继续推送，或按 Ctrl+C 中止...' >&2\nread -r"
}
],
"description": "git push 前暂停以审查变更"
},
{
"matcher": "tool == \"Write\" && tool_input.file_path matches \"\\\\.(md|txt)$\" && !(tool_input.file_path matches \"README\\\\.md|CLAUDE\\\\.md|AGENTS\\\\.md|CONTRIBUTING\\\\.md\")",
"hooks": [
{
"type": "command",
"command": "#!/bin/bash\n# Block creation of unnecessary documentation files\ninput=$(cat)\nfile_path=$(echo \"$input\" | jq -r 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 · 54 lines scan A f7f49eda44db
PreToolUse is a hook published in the GitHub repository cfrs2005/claude-init (1,364 stars, last pushed 5mo 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 2026-08-30.
Other hooks, from other repositories
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.
SessionStart
Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.
PreToolUse
Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.
SessionStart
Runs when a session starts, executing session-start.sh. From anthropics/claude-cookbooks.