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Stop Claude Code from deleting your files

Claude Code is Anthropic's AI coding agent that runs commands in your terminal. Without guardrails, it can delete files, leak secrets, or force-push to production.

One command installs safety hooks that block destructive commands before they execute. 892 example hooks, 213 test files, 30K+ npm downloads (cumulative).

npx cc-safe-setup

8 core safety hooks installed in under 30 seconds. No config needed.

Real incidents from GitHub Issues: 50GB data loss, $1,446 unauthorized transfer, production server destroyed

🔥 New: /rewind deleted my code — recover it · Max usage burn check (why am I hitting limits so fast?) · Safety Scorecard (score & share your setup) · Team Governance Scorecard (is your org governed?) · Attack Simulator (10 scenarios) · Risk Assessment · Incident Tracker (90 incidents)

⚡ Safety AND Convenience — our most popular hook auto-approves safe git commands, reducing clicks while blocking dangerous ones.

ONE-TIME · CUT YOUR TOKENS IN HALF

Token Book — $17

800+ hours of data. 48 token drain symptoms. Copy-paste templates.

MONTHLY · STAY AHEAD OF INCIDENTS

CC Safety Lab — ¥500/mo

Monthly digest: 4-8 incidents, hooks, token-saving techniques. First month free.

Tokens disappearing? Take the free Token Checkup — 5 questions, 30 seconds. Find out what's draining your quota. | Token Book — $17 800h of data, copy-paste templates | Safety Lab — ¥500/mo monthly incident digest | Rolling out to a team? org audit, training & CI gates (法人向け 日本語)

Prompt → PreToolUse → Tool → PostToolUse → Stop

#!/bin/bash
CMD=$(cat | jq -r '.tool_input.command // empty')
[ -z "$CMD" ] && exit 0
echo "$CMD" | grep -qE 'PATTERN' && echo "BLOCKED" >&2 && exit 2
exit 0

#!/bin/bash
CMD=$(cat | jq -r '.tool_input.command // empty')
[ -z "$CMD" ] && exit 0
echo "$CMD" | grep -qE '^git\s+(status|log|diff)' && \
  jq -n '{"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"allow"}}'
exit 0

30K+ npm downloads (cumulative) · 892 example hooks · Production Guide (Zenn Book)

Prevent real incidents:

rm -rf disasters Force-push to main Secret leaks git reset --hard Cascading syntax errors Dependency bloat Temp file buildup Auto Mode safety Hook if field (v2.1.85) Shell variable trap Session drift Token waste Cost explosion bash -x debug leak Post-compact push Hook testing guide Autonomous safety CLAUDE.md best practices Co-Authored-By control Fix git show --no-stat Disable auto-compaction WebFetch domain fix Pipe mode safety Session degradation Denied action retry Background agent writes