Centralize live path glob matching

AI-assisted change prepared by Codex under scheduled architecture-simplification authorization from maintainer pbakaus.

skill/scripts/lib/live-path-globs.mjs

@@ -0,0 +1,37 @@
+/**
+ * Convert a live-config glob pattern to a RegExp.
+ *
+ * Supports `**` across path segments, `*` within one segment, and `?` for one
+ * character. Callers normalize project-relative paths to forward slashes.
+ */
+export function livePathGlobToRegex(pattern) {
+  let re = '';
+  let i = 0;
+  while (i < pattern.length) {
+    const c = pattern[i];
+    if (c === '*') {
+      if (pattern[i + 1] === '*') {
+        if (pattern[i + 2] === '/') {
+          re += '(?:.*/)?';
+          i += 3;
+        } else {
+          re += '.*';
+          i += 2;
+        }
+      } else {
+        re += '[^/]*';
+        i += 1;
+      }
+    } else if (c === '?') {
+      re += '[^/]';
+      i += 1;
+    } else if (/[.+^${}()|[\]\\]/.test(c)) {
+      re += `\\${c}`;
+      i += 1;
+    } else {
+      re += c;
+      i += 1;
+    }
+  }
+  return new RegExp(`^${re}$`);
+}