diff --git a/packages/fieldlens-core/tsconfig.app.json b/packages/fieldlens-core/tsconfig.app.json
new file mode 100644
index 0000000..cfba3d5
--- /dev/null
+++ b/packages/fieldlens-core/tsconfig.app.json
@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "es2023",
+    "lib": ["ES2023", "DOM"],
+    "module": "esnext",
+    "types": ["vite/client", "vite-plugin-pwa/react"],
+    "allowArbitraryExtensions": true,
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true,
+
+    /* Linting */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"]
+}
diff --git a/packages/fieldlens-core/tsconfig.json b/packages/fieldlens-core/tsconfig.json
new file mode 100644
index 0000000..1ffef60
--- /dev/null
+++ b/packages/fieldlens-core/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}
diff --git a/packages/fieldlens-core/tsconfig.node.json b/packages/fieldlens-core/tsconfig.node.json
new file mode 100644
index 0000000..8455dcb
--- /dev/null
+++ b/packages/fieldlens-core/tsconfig.node.json
@@ -0,0 +1,23 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "es2023",
+    "lib": ["ES2023"],
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "module": "nodenext",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["vite.config.ts"]
+}
diff --git a/packages/fieldlens-core/vite.config.ts b/packages/fieldlens-core/vite.config.ts
new file mode 100644
index 0000000..3f0d4aa
--- /dev/null
+++ b/packages/fieldlens-core/vite.config.ts
@@ -0,0 +1,47 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import { VitePWA } from 'vite-plugin-pwa'
+
+export default defineConfig({
+  plugins: [
+    react(),
+    VitePWA({
+      registerType: 'prompt',
+      includeAssets: ['fieldlens-mark.svg', 'apple-touch-icon.png', 'pwa-192.png', 'pwa-512.png'],
+      manifest: {
+        name: 'FieldLens Capture',
+        short_name: 'FieldLens',
+        description: 'Offline barcode capture and duplicate detection.',
+        theme_color: '#17211f',
+        background_color: '#f7f7f2',
+        display: 'standalone',
+        start_url: '/',
+        icons: [
+          {
+            src: '/pwa-192.png',
+            sizes: '192x192',
+            type: 'image/png',
+            purpose: 'any',
+          },
+          {
+            src: '/pwa-512.png',
+            sizes: '512x512',
+            type: 'image/png',
+            purpose: 'any',
+          },
+          {
+            src: '/pwa-512.png',
+            sizes: '512x512',
+            type: 'image/png',
+            purpose: 'maskable',
+          },
+        ],
+      },
+      workbox: {
+        cleanupOutdatedCaches: true,
+        navigateFallback: '/index.html',
+        globPatterns: ['**/*.{js,css,html,svg,wasm}'],
+      },
+    }),
+  ],
+})
diff --git a/scripts/validate-migrations.mjs b/scripts/validate-migrations.mjs
new file mode 100644
index 0000000..ffd3bcf
--- /dev/null
+++ b/scripts/validate-migrations.mjs
@@ -0,0 +1,17 @@
+import { readdir, readFile } from 'node:fs/promises'
+
+const files = (await readdir(new URL('../migrations/', import.meta.url)))
+  .filter((name) => /^\d{3}_.+\.sql$/.test(name))
+  .sort()
+
+if (files.length === 0) throw new Error('No migrations found')
+
+for (const file of files) {
+  const sql = await readFile(new URL(`../migrations/${file}`, import.meta.url), 'utf8')
+  if (!sql.trim()) throw new Error(`${file} is empty`)
+  if (/\bDROP\s+(DATABASE|SCHEMA)\b/i.test(sql)) {
+    throw new Error(`${file} contains destructive database/schema DDL`)
+  }
+}
+
+console.log(JSON.stringify({ ok: true, migrations: files }))