Claude Code hook to delay tool calls to avoid rate limiting (designed for use with Claude Code Router)

settings.local.json

{
  "permissions": {
    "allow": ["Bash(mkdir:*)"]
  },
  "env": { "CLAUDE_TOOL_DELAY": "2" },
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "*",
        "hooks": [
          {
            "type": "command",
            "command": "echo \"⏳ Delaying tool execution by ${CLAUDE_TOOL_DELAY}s...\" && sleep \"${CLAUDE_TOOL_DELAY}\""
          }
        ]
      }
    ]
  }
}