diff --git a/.planning/STATE.md b/.planning/STATE.md
index b5080f4..0f17386 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -4,14 +4,14 @@ milestone: v1.0
 milestone_name: milestone
 status: verifying
 stopped_at: Phase 1 plans complete (01-01 through 01-04)
-last_updated: "2026-06-06T08:55:46.710Z"
-last_activity: 2026-06-06 -- Plan 01-03 (Pet CRUD) verified by human checkpoint; 5 post-checkpoint UX fixes applied
+last_updated: "2026-06-06T09:48:37.937Z"
+last_activity: 2026-06-06 -- Phase 1 fully verified; media storage switched from R2 to Supabase Storage; avatar CDN display confirmed working
 progress:
   total_phases: 7
-  completed_phases: 0
+  completed_phases: 1
   total_plans: 4
-  completed_plans: 3
-  percent: 0
+  completed_plans: 5
+  percent: 14
 ---
 
 # Project State
@@ -21,14 +21,14 @@ progress:
 See: .planning/PROJECT.md (updated 2026-06-05)
 
 **Core value:** Pets are first-class social identities — not just content on a human's feed — so every feature is built around the pet's life, not the owner's.
-**Current focus:** Phase 1 — Foundation
+**Current focus:** Phase 2 — Content Core (next)
 
 ## Current Position
 
-Phase: 1 (Foundation) — EXECUTING
-Plan: 4 of 4 (next: 01-04 Media Pipeline / R2 Avatar Upload)
-Status: Plans 01-01, 01-02, 01-03 complete and UAT verified
-Last activity: 2026-06-06 -- Plan 01-03 (Pet CRUD) verified by human checkpoint; 5 post-checkpoint UX fixes applied
+Phase: 1 (Foundation) — COMPLETE
+Plan: 4 of 4 complete
+Status: All Phase 1 success criteria met; walking skeleton verified end-to-end
+Last activity: 2026-06-06 -- Phase 1 fully verified; media storage switched from R2 to Supabase Storage; avatar CDN display confirmed working
 
 Progress: [██░░░░░░░░] 7%
 
diff --git a/.planning/phases/01-foundation/SUMMARY.md b/.planning/phases/01-foundation/SUMMARY.md
new file mode 100644
index 0000000..a0a8f99
--- /dev/null
+++ b/.planning/phases/01-foundation/SUMMARY.md
@@ -0,0 +1,65 @@
+---
+phase: '01'
+phase_name: Foundation
+milestone: v1.0
+status: complete
+completed: '2026-06-06'
+plans_total: 4
+plans_complete: 4
+tests_passing: 18
+storage_switch: R2 -> Supabase Storage (post-execution fix)
+---
+
+# Phase 01: Foundation — COMPLETE
+
+**One-liner:** Walking skeleton end-to-end verified — owner can sign up, create and manage pet profiles, and upload avatars served from Supabase Storage CDN; 18 passing unit tests; all Phase 1 success criteria met.
+
+## What Was Built
+
+### Plan 01 — Walking Skeleton
+Next.js 16.2.7 scaffold with Tailwind v4, shadcn/ui (base-nova, orange design system), Clerk 7 auth proxy, Prisma 7 schema (Owner / Species / Breed / Pet), tRPC 11 ownership-asserted procedures, ActivePetContext backed by localStorage, Vitest scaffold. Solved Prisma 7 breaking changes (prisma.config.ts; @prisma/adapter-pg).
+
+### Plan 02 — Auth + App Shell
+Clerk auth pages (sign-up, log-in, forgot/reset password, verify-email) with orange-500 appearance. Protected 240 px sidebar + mobile bottom nav. Server-side pet guard redirects no-pet owners to onboarding.
+
+### Plan 03 — Pet CRUD
+Full CRUD via tRPC (create/update/delete/listSpecies/listBreeds). PetForm, PetCard components. My Pets grid, pet profile page, pet edit page. 45-breed seed. 11 passing unit tests.
+
+### Plan 04 — Media Pipeline
+tRPC media router (getPresignedUrl + confirmUpload) with server-only import, contentType enum, 10 MB cap, path-traversal key prefix guard. Five-state AvatarUpload component (idle / idle-with-avatar / dragging / uploading / error) with XHR progress. CDN avatars in profile, edit page, Sidebar, MobileNav. 7 passing security tests.
+
+### Post-execution — Supabase Storage switch
+Switched from Cloudflare R2 to Supabase Storage for simpler setup and co-location with Postgres.
+- src/lib/supabase-storage.ts (server-only): createSignedUploadUrl + getPublicUrl
+- src/lib/avatar-url.ts (client-safe): getAvatarUrl helper
+- All avatar display locations updated (profile, edit, PetCard, Sidebar, MobileNav)
+- next.config.ts remotePatterns updated for Supabase hostname
+- Upload + CDN delivery confirmed working end-to-end
+
+## Success Criteria — All Met
+
+| Criterion | Status |
+|-----------|--------|
+| Owner can sign up and log in via Clerk | complete |
+| Owner with no pets redirected to onboarding | complete |
+| Owner can create, edit, and delete a pet profile | complete |
+| Owner can upload an avatar served from CDN | complete |
+| App shell shows active pet context (sidebar + mobile nav) | complete |
+| All pet mutations assert ownership | complete |
+| 18 unit tests passing; TypeScript clean | complete |
+
+## Architecture Decisions Locked In
+
+- Pet-as-actor identity via active_pet_id + localStorage (must be in Phase 1; cannot retrofit)
+- All media via presigned upload — binary never through API server
+- Supabase Storage over R2 — simpler, co-located with Postgres, same SDK
+- Stories = separate DB table (not posts with expires_at) — pre-committed for Phase 2
+- Feed via Redis fan-out sorted sets from day one — pre-committed for Phase 2
+
+## Test Results
+
+18 tests passing, 0 failing
+  auth.test.ts: 4 tests
+  pet-profile.test.ts: 7 tests
+  media-upload.test.ts: 7 tests
+TypeScript: npx tsc --noEmit exits 0