diff --git a/prd.json b/prd.json
index 4ef1dac..f6358db 100644
--- a/prd.json
+++ b/prd.json
@@ -33,8 +33,8 @@
         "Typecheck passes"
       ],
       "priority": 2,
-      "passes": false,
-      "notes": ""
+      "passes": true,
+      "notes": "Completed: better-sqlite3 + drizzle-orm, 5-table schema, non-destructive push migration via CREATE TABLE IF NOT EXISTS, WAL mode enabled"
     },
     {
       "id": "US-003",
diff --git a/scripts/ralph/progress.txt b/scripts/ralph/progress.txt
new file mode 100644
index 0000000..a155e1d
--- /dev/null
+++ b/scripts/ralph/progress.txt
@@ -0,0 +1,30 @@
+# Ralph Progress Log
+Started: Thu Feb 19 16:33:18 CET 2026
+---
+
+## Codebase Patterns
+- Vite configs use `.mts` extension to avoid ESM/CJS issues with electron-forge
+- Native Node modules (e.g. better-sqlite3) must be externalized in `vite.main.config.mts` rollupOptions.external
+- `AutoUnpackNativesPlugin` from `@electron-forge/plugin-auto-unpack-natives` must be first in plugins array in forge.config.ts for native module asar compatibility
+- DB is initialized in main process `app.on('ready')` handler; use `getDb()` singleton everywhere else in main process
+- All table IDs are TEXT (UUID); timestamps are INTEGER (unix ms); status/priority columns use TEXT with enum values
+- TypeScript types use `InferSelectModel` / `InferInsertModel` from drizzle-orm — no manual type duplication
+- `drizzle.config.ts` at project root points drizzle-kit CLI at `src/main/db/schema.ts`
+
+---
+
+## 2026-02-19 - US-002
+- Installed `better-sqlite3`, `drizzle-orm` (runtime) and `@types/better-sqlite3`, `drizzle-kit` (dev)
+- Created `src/main/db/schema.ts`: 5 tables (clients, projects, tasks, checkpoints, notes) with exported InferSelectModel/InferInsertModel types
+- Created `src/main/db/index.ts`: `initDb()` opens/creates `adiuva.db` at `app.getPath('userData')`, runs CREATE TABLE IF NOT EXISTS (non-destructive), enables WAL mode; `getDb()` singleton accessor
+- Updated `src/main/index.ts`: call `initDb()` in `app.on('ready')`
+- Updated `vite.main.config.mts`: externalized `better-sqlite3`
+- Updated `forge.config.ts`: added `AutoUnpackNativesPlugin`
+- Added `drizzle.config.ts` for drizzle-kit CLI
+- Typecheck: passes with zero errors
+- **Learnings for future iterations:**
+  - better-sqlite3 is CommonJS with native addon; Vite must NOT bundle it — always add to rollupOptions.external
+  - The CREATE TABLE IF NOT EXISTS approach satisfies "never destructive" and works perfectly in electron without needing migration file resolution
+  - electron-forge rebuilds native modules automatically on `electron-forge start`; no manual rebuild step needed
+  - `app.getPath('userData')` is only available after `app.on('ready')` fires — do not call earlier
+---