diff --git a/.planning/PROJECT.md b/.planning/PROJECT.md
index ed9cb75..b2f531e 100644
--- a/.planning/PROJECT.md
+++ b/.planning/PROJECT.md
@@ -27,12 +27,13 @@ desktop for read-only awareness.
 - ✓ Standalone `/mobile/nav` page (to be replaced by drawer) — existing
 - ✓ Authentication, sync workers, analyzer pipeline, Engagement data sources —
   existing in desktop app and reused here
+- ✓ PWA scaffolding (manifest, viewport-fit=cover, `pt-safe`/`pb-safe` utilities)
+  — Validated in Phase 1: PWA Scaffolding (PWA-01..04)
 
 ### Active
 
 <!-- Hypotheses for this milestone — see docs/superpowers/specs/2026-05-03-mobile-shell-design.md -->
 
-- [ ] PWA scaffolding (manifest, viewport, safe-area insets) — no service worker
 - [ ] New `/mobile/layout.tsx` shell — header (logo + Bell placeholder + avatar),
       content area, bottom nav with 4 tabs + More
 - [ ] More drawer (Sheet) replaces `/mobile/nav` — Mobile sections, Full site
@@ -131,4 +132,4 @@ This document evolves at phase transitions and milestone boundaries.
 4. Update Context with current state
 
 ---
-*Last updated: 2026-05-03 after initialization*
+*Last updated: 2026-05-03 — Phase 1 complete (PWA scaffolding)*