fix: add event type enum to hooks schema and avoid shared RegExp state

- hooks.schema.json: add enum constraint for hook event types
  (PreToolUse, PostToolUse, PreCompact, SessionStart, SessionEnd,
  Stop, Notification, SubagentStop) — enables IDE autocompletion
  and compile-time validation
- utils.js countInFile: always create fresh RegExp to avoid shared
  lastIndex state when reusing global regex instances
- README: update AgentShield stats (751 tests, 73 rules)

README.md

@@ -374,7 +374,7 @@ Both options create:
 
 ### AgentShield — Security Auditor
 
-> Built at the Claude Code Hackathon (Cerebral Valley x Anthropic, Feb 2026). 697 tests, 98% coverage, 63 static analysis rules.
+> Built at the Claude Code Hackathon (Cerebral Valley x Anthropic, Feb 2026). 751 tests, 98% coverage, 73 static analysis rules.
 
 Scan your Claude Code configuration for vulnerabilities, misconfigurations, and injection risks.
 

schemas/hooks.schema.json

@@ -11,7 +11,18 @@
       ],
       "properties": {
         "type": {
-          "type": "string"
+          "type": "string",
+          "enum": [
+            "PreToolUse",
+            "PostToolUse",
+            "PreCompact",
+            "SessionStart",
+            "SessionEnd",
+            "Stop",
+            "Notification",
+            "SubagentStop"
+          ],
+          "description": "Hook event type that triggers this hook"
         },
         "command": {
           "oneOf": [

scripts/lib/utils.js

@@ -418,8 +418,8 @@ function countInFile(filePath, pattern) {
   let regex;
   try {
     if (pattern instanceof RegExp) {
-      // Ensure global flag is set for correct counting
+      // Always create new RegExp to avoid shared lastIndex state; ensure global flag
-      regex = pattern.global ? pattern : new RegExp(pattern.source, pattern.flags.includes('g') ? pattern.flags : pattern.flags + 'g');
+      regex = new RegExp(pattern.source, pattern.flags.includes('g') ? pattern.flags : pattern.flags + 'g');
     } else if (typeof pattern === 'string') {
       regex = new RegExp(pattern, 'g');
     } else {