diff --git a/trios/agent-server/apps/agent/entrypoints/app/profile/ProfilePage.test.ts b/trios/agent-server/apps/agent/entrypoints/app/profile/ProfilePage.test.ts
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+++ b/trios/agent-server/apps/agent/entrypoints/app/profile/ProfilePage.test.ts
@@ -0,0 +1,125 @@
+/**
+ * @license
+ * Copyright 2025 BrowserOS
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * The profile page, held against its contract
+ * (gHashTag/trios#1523): the one export of
+ * entrypoints/app/profile/ProfilePage.tsx - ProfilePage - pinned
+ * as it behaves today, so the next change to that file has something
+ * to fail against.
+ *
+ * This was the second subject the frozen session facade blocked: the
+ * page statically imports useSessionInfo, and until the session
+ * seam's earliest registrar carried the full named-export set (the
+ * #1980 repair, proven by #2025), the page could not even link in
+ * the group. The suite drives the two hooks the page reads - the
+ * session seam through a mutable holder answering signed-out and
+ * signed-in states, the profile query through a holder answering
+ * the loaded profile - inside a real memory router and query client
+ * provider, with the update mutation stubbed idle. Everything else
+ * stays real: the form machinery with its zod resolver, the card and
+ * button kits. Measured, the signed-out mount answers only its
+ * spinner - no profile card; and the signed-in loaded mount answers
+ * the update-profile card with its title and description - the
+ * profile's names reach the form fields through a reset effect a
+ * static render never runs, so they are not part of the mount.
+ *
+ * Not pinned, and why (issue User Story 2): the update flow itself
+ * - the mutation and its success note, the avatar upload with its
+ * size guard, the validation messages, and the profile-names reset
+ * into the form fields - lives in handlers and effects needing a
+ * live document to press. The port env seam is seeded before any
+ * import can reach the env module (its one-time snapshot - the trap
+ * the agent-outputs suite documented), with the subject read
+ * through a query-qualified specifier so this suite's graph loads
+ * as its own fresh instances.
+ */
+
+import { describe, expect, it, mock } from 'bun:test'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { createElement } from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+import { MemoryRouter } from 'react-router'
+
+// biome-ignore lint/style/noProcessEnv: the env seam is the only way to reach the port helpers before the env module's one-time snapshot freezes (see suite header)
+process.env.VITE_BROWSEROS_SERVER_PORT ??= '43210'
+
+const sessionState: {
+  sessionInfo: { user?: { id: string } }
+} = {
+  sessionInfo: {},
+}
+
+const profileState: {
+  profileByUserId?: {
+    rowId: string
+    firstName: string
+    lastName: string
+    avatarUrl?: string
+  }
+} = {}
+
+mock.module('@/lib/auth/sessionStorage', () => ({
+  sessionStorage: {
+    getValue: async () => sessionState.sessionInfo,
+    setValue: async () => {},
+    watch: () => () => {},
+  },
+  useSessionInfo: () => ({
+    sessionInfo: sessionState.sessionInfo,
+    isLoading: false,
+    updateSessionInfo: async () => {},
+  }),
+}))
+
+mock.module('@/lib/graphql/useGraphqlQuery', () => ({
+  useGraphqlQuery: () => ({
+    data: profileState.profileByUserId,
+    isLoading: false,
+  }),
+}))
+
+mock.module('@/lib/graphql/useGraphqlMutation', () => ({
+  useGraphqlMutation: () => ({
+    mutate: () => {},
+  }),
+}))
+
+const subjectUrl = './ProfilePage?profile-page-suite-real'
+const { ProfilePage } = (await import(
+  subjectUrl
+)) as typeof import('./ProfilePage')
+
+const renderPage = () =>
+  renderToStaticMarkup(
+    createElement(
+      QueryClientProvider,
+      { client: new QueryClient() },
+      createElement(
+        MemoryRouter,
+        { initialEntries: ['/profile'] },
+        createElement(ProfilePage),
+      ),
+    ),
+  )
+
+describe('ProfilePageTsxContract', () => {
+  describe('ProfilePage', () => {
+    it('answers the signed-out mount with only its spinner, and the signed-in loaded mount with the update-profile card carrying its title and description', () => {
+      const signedOut = renderPage()
+      expect(signedOut).not.toContain('Update Profile')
+      expect(signedOut).toContain('animate-spin')
+
+      sessionState.sessionInfo = { user: { id: 'user-1' } }
+      profileState.profileByUserId = {
+        rowId: 'profile-9',
+        firstName: 'Ada',
+        lastName: 'Lovelace',
+      }
+      const loaded = renderPage()
+      expect(loaded).toContain('Update Profile')
+      expect(loaded).toContain('Update your profile information')
+    })
+  })
+})