chore: update mention gating docs and tests

src/auto-reply/reply/mentions.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  buildMentionRegexes,
+  matchesMentionPatterns,
+  normalizeMentionText,
+} from "./mentions.js";
+
+describe("mention helpers", () => {
+  it("builds regexes and skips invalid patterns", () => {
+    const regexes = buildMentionRegexes({
+      routing: {
+        groupChat: { mentionPatterns: ["\\bclawd\\b", "(invalid"] },
+      },
+    });
+    expect(regexes).toHaveLength(1);
+    expect(regexes[0]?.test("clawd")).toBe(true);
+  });
+
+  it("normalizes zero-width characters", () => {
+    expect(normalizeMentionText("cl\u200bawd")).toBe("clawd");
+  });
+
+  it("matches patterns case-insensitively", () => {
+    const regexes = buildMentionRegexes({
+      routing: { groupChat: { mentionPatterns: ["\\bclawd\\b"] } },
+    });
+    expect(matchesMentionPatterns("CLAWD: hi", regexes)).toBe(true);
+  });
+});