diff --git a/.planning/PROJECT.md b/.planning/PROJECT.md
index 6bb76e3..874ab75 100644
--- a/.planning/PROJECT.md
+++ b/.planning/PROJECT.md
@@ -83,8 +83,17 @@ desktop for read-only awareness.
 
 <!-- Hypotheses for this milestone — see docs/superpowers/specs/2026-05-03-mobile-shell-design.md -->
 
-- [ ] Engagement user profile (NEW) — `/mobile/engagement/[userId]` real-page
-      profile replacing the desktop modal pattern (Phase 8 — ENG-06..08)
+- ✓ Engagement user profile (NEW) — `/mobile/engagement/[userId]` real-page
+  profile replacing the desktop modal pattern. Server-side photo proxy at
+  `/api/mobile/engagement/user/[userId]/photo` (`MsGraphClient.getUserPhotoBytes()`,
+  `Cache-Control: private, max-age=3600`, neutral 404/502/503). Client page
+  composes six new components — Skeleton, Header (photo with onError →
+  initials fallback), MetricGrid (2×2), Breakdown (Time/Communication/
+  Meetings with conditional Zoom + after-hours), RecentEntries, RecentMeetings.
+  Reuses `/api/engagement/user/[userId]` verbatim. Period chips (D7/D30/D90)
+  refetch on change. Scroll restoration on back is partial (sessionStorage
+  shim added but does not restore reliably; accepted as a known limitation).
+  Validated in Phase 8: Engagement User Profile (ENG-06..08)
 
 ### Out of Scope