diff --git a/package.json b/package.json
index db7558bba..5d1b2eb17 100644
--- a/package.json
+++ b/package.json
@@ -36,8 +36,8 @@
 		"setup:db:chat": "./scripts/setup-databases.sh chat",
 		"setup:db:auth": "./scripts/setup-databases.sh auth",
 		"setup:dev-user": "./scripts/dev/setup-dev-user.sh",
-		"build:packages": "pnpm --filter '@mana/*' build",
-		"postinstall": "node scripts/generate-env.mjs || true && pnpm run build:packages || true",
+		"build:packages": "pnpm --filter './packages/*' build",
+		"postinstall": "node scripts/generate-env.mjs && pnpm run build:packages",
 		"mana:dev": "turbo run dev --filter=mana...",
 		"cards:dev": "turbo run dev --filter=cards...",
 		"picture:dev": "turbo run dev --filter=picture...",
diff --git a/packages/shared-types/src/index.ts b/packages/shared-types/src/index.ts
index 19a97e2ef..7baa62e2d 100644
--- a/packages/shared-types/src/index.ts
+++ b/packages/shared-types/src/index.ts
@@ -4,26 +4,30 @@
  * This package contains common TypeScript types used across all projects.
  */
 
+// Re-exports without file extensions. shared-types is consumed in
+// bundler-mode tsconfigs across the monorepo; explicit `.ts` extensions
+// require `allowImportingTsExtensions` on every downstream, which broke
+// `shared-auth` and silently hid in the postinstall behind `|| true`.
 // Theme types
-export * from './theme.ts';
+export * from './theme';
 
 // Auth types
-export * from './auth.ts';
+export * from './auth';
 
 // UI types
-export * from './ui.ts';
+export * from './ui';
 
 // Common utility types
-export * from './common.ts';
+export * from './common';
 
 // Contact types for cross-app integration
-export * from './contact.ts';
+export * from './contact';
 
 // Landing page configuration types
-export * from './landing-config.ts';
+export * from './landing-config';
 
 // AI structured-output Zod schemas (shared between mana-api + web frontend)
-export * from './ai-schemas.ts';
+export * from './ai-schemas';
 
 // API types
 export interface User {