{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Write",
        "hooks": [
          {
            "type": "command",
            "command": "f=$(jq -r '.tool_input.file_path // empty'); [ -z \"$f\" ] && exit 0; lines=$(printf '%s' \"$(jq -r '.tool_input.content // empty')\" | awk 'END{print NR}'); if [ \"${lines:-0}\" -gt 500 ]; then echo '{\"decision\":\"block\",\"reason\":\"breakpilot guardrail: file exceeds the 500-line hard cap. Split it into smaller modules per the layering rules in AGENTS.<lang>.md. If this is generated/data code, add an entry to .claude/rules/loc-exceptions.txt with rationale and reference [guardrail-change].\"}'; exit 0; fi",
            "shell": "bash",
            "timeout": 5
          }
        ]
      },
      {
        "matcher": "Edit",
        "hooks": [
          {
            "type": "command",
            "command": "f=$(jq -r '.tool_input.file_path // empty'); [ -z \"$f\" ] || [ ! -f \"$f\" ] && exit 0; case \"$f\" in *.md|*.json|*.yaml|*.yml|*test*|*tests/*|*node_modules/*|*.next/*|*migrations/*) exit 0 ;; esac; new_str=$(jq -r '.tool_input.new_string // empty'); old_str=$(jq -r '.tool_input.old_string // empty'); old_lines=$(printf '%s' \"$old_str\" | awk 'END{print NR}'); new_lines=$(printf '%s' \"$new_str\" | awk 'END{print NR}'); cur=$(wc -l < \"$f\" | tr -d ' '); proj=$((cur - old_lines + new_lines)); if [ \"$proj\" -gt 500 ]; then echo \"{\\\"decision\\\":\\\"block\\\",\\\"reason\\\":\\\"breakpilot guardrail: this edit would push $f to ~$proj lines (hard cap is 500). Split the file before continuing. See AGENTS.<lang>.md for the layering rules.\\\"}\"; fi; exit 0",
            "shell": "bash",
            "timeout": 5
          }
        ]
      }
    ]
  }
}