diff --git a/apps/desktop/src/plugins/hermes-bots/plugin.js b/apps/desktop/src/plugins/hermes-bots/plugin.js
index e8c709bbae..c39ab1a385 100644
--- a/apps/desktop/src/plugins/hermes-bots/plugin.js
+++ b/apps/desktop/src/plugins/hermes-bots/plugin.js
@@ -4600,7 +4600,11 @@ function previewKind(preview) {
   }
   const match = text.match(A2A_RE)
   if (match) {
-    return { fromBot: (match[1] || match[2] || '').trim().toLowerCase() || null }
+    // The captured name is whatever the delivery prefix carried — a raw
+    // profile name. Map it the way every other surface does so the primary
+    // profile reads @hermes, never @default (#89484).
+    const sender = (match[1] || match[2] || '').trim().toLowerCase()
+    return { fromBot: sender ? botHandle(sender) : null }
   }
   return { fromBot: null }
 }
@@ -9175,8 +9179,12 @@ function GroupRow({ group, members, needsYou, onOpen }) {
   const log = Array.isArray(room.log) ? room.log : []
   const last = log.length ? log[log.length - 1] : null
   const lastAt = groupLastActivity(room)
+  // Room previews speak the same handle vocabulary as the roster, mentions
+  // and the group prompt: the primary profile is @hermes, not @default.
+  const lastFrom = last?.from?.name || ''
+  const lastHandle = botHandle(lastFrom || 'bot', members.find(member => member?.name === lastFrom))
   const preview = last
-    ? `${last.from?.kind === 'user' ? 'You' : `@${last.from?.name || 'bot'}`}: ${stripPreviewMarkdown(last.text) || '…'}`
+    ? `${last.from?.kind === 'user' ? 'You' : `@${lastHandle}`}: ${stripPreviewMarkdown(last.text) || '…'}`
     : 'No messages yet — say hi to the room'
   const faces = members.slice(0, 3)
 
diff --git a/apps/desktop/src/plugins/hermes-bots/tests/group-chat.test.mjs b/apps/desktop/src/plugins/hermes-bots/tests/group-chat.test.mjs
index d61e04560a..8f0e3f9741 100644
--- a/apps/desktop/src/plugins/hermes-bots/tests/group-chat.test.mjs
+++ b/apps/desktop/src/plugins/hermes-bots/tests/group-chat.test.mjs
@@ -714,3 +714,11 @@ test('source contract: group chat message bodies opt back into selectable text',
   const src = groupChatWorkspaceSource()
   assert.match(src, /'data-selectable-text':\s*'true'/)
 })
+
+test('group room preview renders the bot HANDLE, not the raw profile name', () => {
+  // #89484: the room line read "@default: …" while the bot answers to
+  // @hermes, so users concluded mention routing was broken.
+  assert.match(pluginSource, /const lastHandle = botHandle\(lastFrom \|\| 'bot', members\.find\(/)
+  assert.match(pluginSource, /\? `\$\{last\.from\?\.kind === 'user' \? 'You' : `@\$\{lastHandle\}`\}/)
+  assert.doesNotMatch(pluginSource, /`@\$\{last\.from\?\.name \|\| 'bot'\}`/)
+})
diff --git a/apps/desktop/src/plugins/hermes-bots/tests/roster-preview.test.mjs b/apps/desktop/src/plugins/hermes-bots/tests/roster-preview.test.mjs
index a91d9513e3..7b32d664ce 100644
--- a/apps/desktop/src/plugins/hermes-bots/tests/roster-preview.test.mjs
+++ b/apps/desktop/src/plugins/hermes-bots/tests/roster-preview.test.mjs
@@ -209,3 +209,13 @@ test('render: BotRow previews the pinned canonical chat, not an unrelated latest
   assert.match(text, /pinned chat content/)
   assert.doesNotMatch(text, /unrelated scratch content/)
 })
+
+test('previewKind: the primary profile surfaces as @hermes, never @default', () => {
+  // botHandle() exists so "the word 'default' never surfaces in the UI"; the
+  // bot-to-bot badge was rendering the raw captured profile name (#89484).
+  assert.equal(fromBotOf("Message from agent 'default': deploy is green"), 'hermes')
+})
+
+test('previewKind: a named profile keeps its own handle', () => {
+  assert.equal(fromBotOf("Message from agent 'ops': deploy is green"), 'ops')
+})
diff --git a/contributors/emails/johnsonafuye@gmail.com b/contributors/emails/johnsonafuye@gmail.com
new file mode 100644
index 0000000000..455905ad08
--- /dev/null
+++ b/contributors/emails/johnsonafuye@gmail.com
@@ -0,0 +1,2 @@
+johnsonAyo
+# PR for #89484 (desktop: group room preview uses botHandle)