Fix WhatsApp group access when senders are opaque LIDs.

Resolve LID to phone aliases before allowlist and @mention checks so
group prompts are not silently dropped after a working direct chat.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/channels/shared/text-harness-bridge.test.mjs

@@ -158,6 +158,7 @@ function createBridge({
   signal,
   logger,
   reactions,
+  groupSessionScope = 'chat',
 } = {}) {
   return new TextHarnessBridge({
     descriptor: { key: 'test', label: 'Test', reactions },
@@ -166,6 +167,7 @@ function createBridge({
     state,
     signal,
     logger: logger ?? { warn() {}, error() {} },
+    groupSessionScope,
   });
 }
 

test/channels/whatsapp/whatsapp-identity.test.mjs

@@ -0,0 +1,74 @@
+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+
+import {
+  enrichWhatsappInboundIdentities,
+  isWhatsappLidJid,
+  rememberWhatsappLidPnPairs,
+} from '../../../src/channels/whatsapp/whatsapp-identity.mjs';
+
+describe('whatsapp-identity', () => {
+  it('recognizes lid jids', () => {
+    assert.equal(isWhatsappLidJid('91010910658657@lid'), true);
+    assert.equal(isWhatsappLidJid('8618142387786@s.whatsapp.net'), false);
+  });
+
+  it('remembers lid/pn pairs from message keys', () => {
+    const cache = new Map();
+    rememberWhatsappLidPnPairs(cache, {
+      participant: '91010910658657@lid',
+      participantAlt: '8618142387786@s.whatsapp.net',
+    });
+    assert.equal(cache.get('91010910658657'), '8618142387786@s.whatsapp.net');
+  });
+
+  it('enriches group sender aliases and mentions from lid mapping', async () => {
+    const cache = new Map();
+    const socket = {
+      signalRepository: {
+        lidMapping: {
+          async getPNForLID(lid) {
+            if (lid === '91010910658657@lid') return '8618142387786@s.whatsapp.net';
+            if (lid === '111222333444555@lid') return '8615601877957@s.whatsapp.net';
+            return null;
+          },
+          async getLIDForPN(pn) {
+            if (pn === '8615601877957@s.whatsapp.net') return '111222333444555@lid';
+            return null;
+          },
+        },
+      },
+    };
+    const raw = {
+      key: {
+        remoteJid: '120363429229984366@g.us',
+        participant: '91010910658657@lid',
+        id: 'msg-1',
+        fromMe: false,
+      },
+      message: {
+        extendedTextMessage: {
+          text: '@bot hello',
+          contextInfo: { mentionedJid: ['111222333444555@lid'] },
+        },
+      },
+    };
+    const normalized = {
+      messageId: 'g:msg-1',
+      providerMessageId: 'msg-1',
+      senderId: '91010910658657@lid',
+      senderAlternateId: '',
+      kind: 'group',
+      conversationId: '120363429229984366@g.us',
+      content: '@bot hello',
+      addressed: false,
+    };
+    const enriched = await enrichWhatsappInboundIdentities(normalized, raw, {
+      accountJid: '8615601877957@s.whatsapp.net',
+      socket,
+      lidPnCache: cache,
+    });
+    assert.equal(enriched.addressed, true);
+    assert.ok(enriched.senderAliasIds.includes('8618142387786@s.whatsapp.net'));
+  });
+});