diff --git a/.planning/PROJECT.md b/.planning/PROJECT.md
index f7628c3..8cf57fb 100644
--- a/.planning/PROJECT.md
+++ b/.planning/PROJECT.md
@@ -25,6 +25,10 @@ Reliable, persistent visibility into which services need updating — data never
 - ✓ Proper UPSERT preserving tag assignments on re-webhook — Phase 1
 - ✓ Request body size limits (1MB) on webhook and API endpoints — Phase 1
 - ✓ Test error handling uses t.Fatalf (no silent failures) — Phase 1
+- ✓ Store interface abstracts all persistence operations (9 methods) — Phase 2
+- ✓ Server struct replaces package-level globals (db, mu, webhookSecret) — Phase 2
+- ✓ Schema migrations via golang-migrate with embedded SQL files — Phase 2
+- ✓ Per-test in-memory databases for isolated, parallel-safe testing — Phase 2
 
 ### Active
 
@@ -66,7 +70,9 @@ Reliable, persistent visibility into which services need updating — data never
 | Decision | Rationale | Outcome |
 |----------|-----------|---------|
 | Dual DB (SQLite + PostgreSQL) | SQLite is fine for simple setups, Postgres for users who want robustness | — Pending |
-| Fix SQLite bugs before adding features | Data trust is the #1 priority; features on a broken foundation waste effort | — Pending |
+| Fix SQLite bugs before adding features | Data trust is the #1 priority; features on a broken foundation waste effort | ✓ Phase 1 |
+| Store interface as persistence abstraction | 9 methods, no SQL in handlers; enables PostgreSQL swap without touching HTTP layer | ✓ Phase 2 |
+| Server struct over package globals | Dependency injection via constructor; enables per-test isolated databases | ✓ Phase 2 |
 | Defer auto-grouping to future milestone | Requires research into Docker socket / DIUN metadata; don't want to slow down stability fixes | — Pending |
 | Defer DIUN bundling to future milestone | Significant scope; need stability and UX improvements first | — Pending |
 
@@ -88,4 +94,4 @@ This document evolves at phase transitions and milestone boundaries.
 4. Update Context with current state
 
 ---
-*Last updated: 2026-03-23 after Phase 1 completion*
+*Last updated: 2026-03-24 after Phase 2 completion*