Decouple formatting test from @Andy (#329)

* Fix trigger pattern tests to use config name

Tests hardcoded "Andy" but the pattern is built from
`ASSISTANT_NAME` which comes from `.env`.

---

Generated with the help of Claude Code, https://claude.ai/code

Co-Authored-By: Claude Code Opus 4.6 <noreply@anthropic.com>

* Restore usage comment in trim test

---

Generated with the help of Claude Code, https://claude.ai/code

Co-Authored-By: Claude Code Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Code Opus 4.6 <noreply@anthropic.com>

src/formatting.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect } from 'vitest';
 
-import { TRIGGER_PATTERN } from './config.js';
+import { ASSISTANT_NAME, TRIGGER_PATTERN } from './config.js';
 import {
   escapeXml,
   formatMessages,
@@ -102,34 +102,38 @@ describe('formatMessages', () => {
 // --- TRIGGER_PATTERN ---
 
 describe('TRIGGER_PATTERN', () => {
-  it('matches @Andy at start of message', () => {
-    expect(TRIGGER_PATTERN.test('@Andy hello')).toBe(true);
+  const name = ASSISTANT_NAME;
+  const lower = name.toLowerCase();
+  const upper = name.toUpperCase();
+
+  it('matches @name at start of message', () => {
+    expect(TRIGGER_PATTERN.test(`@${name} hello`)).toBe(true);
   });
 
   it('matches case-insensitively', () => {
-    expect(TRIGGER_PATTERN.test('@andy hello')).toBe(true);
-    expect(TRIGGER_PATTERN.test('@ANDY hello')).toBe(true);
+    expect(TRIGGER_PATTERN.test(`@${lower} hello`)).toBe(true);
+    expect(TRIGGER_PATTERN.test(`@${upper} hello`)).toBe(true);
   });
 
   it('does not match when not at start of message', () => {
-    expect(TRIGGER_PATTERN.test('hello @Andy')).toBe(false);
+    expect(TRIGGER_PATTERN.test(`hello @${name}`)).toBe(false);
   });
 
-  it('does not match partial name like @Andrew (word boundary)', () => {
-    expect(TRIGGER_PATTERN.test('@Andrew hello')).toBe(false);
+  it('does not match partial name like @NameExtra (word boundary)', () => {
+    expect(TRIGGER_PATTERN.test(`@${name}extra hello`)).toBe(false);
   });
 
   it('matches with word boundary before apostrophe', () => {
-    expect(TRIGGER_PATTERN.test("@Andy's thing")).toBe(true);
+    expect(TRIGGER_PATTERN.test(`@${name}'s thing`)).toBe(true);
   });
 
-  it('matches @Andy alone (end of string is a word boundary)', () => {
-    expect(TRIGGER_PATTERN.test('@Andy')).toBe(true);
+  it('matches @name alone (end of string is a word boundary)', () => {
+    expect(TRIGGER_PATTERN.test(`@${name}`)).toBe(true);
   });
 
   it('matches with leading whitespace after trim', () => {
     // The actual usage trims before testing: TRIGGER_PATTERN.test(m.content.trim())
-    expect(TRIGGER_PATTERN.test('@Andy hey'.trim())).toBe(true);
+    expect(TRIGGER_PATTERN.test(`@${name} hey`.trim())).toBe(true);
   });
 });
 
@@ -219,7 +223,7 @@ describe('trigger gating (requiresTrigger interaction)', () => {
   });
 
   it('non-main group with requiresTrigger=true processes when trigger present', () => {
-    const msgs = [makeMsg({ content: '@Andy do something' })];
+    const msgs = [makeMsg({ content: `@${ASSISTANT_NAME} do something` })];
     expect(shouldProcess(false, true, msgs)).toBe(true);
   });