diff --git a/.env.local.example b/.env.local.example
new file mode 100644
index 0000000..5fcb7dc
--- /dev/null
+++ b/.env.local.example
@@ -0,0 +1,8 @@
+# Supabase — projeto InAudit Hotel
+VITE_SUPABASE_URL=https://acdvblhzzaneddlxqyst.supabase.co
+VITE_SUPABASE_ANON_KEY=
+VITE_SUPABASE_SCHEMA=reserva_hotel
+
+# Chatwoot — token de integração (Fase 2)
+VITE_CHATWOOT_API_URL=https://chatwoot.fazer.ai
+VITE_CHATWOOT_API_TOKEN=
diff --git a/src/lib/supabase.ts b/src/lib/supabase.ts
new file mode 100644
index 0000000..d916158
--- /dev/null
+++ b/src/lib/supabase.ts
@@ -0,0 +1,16 @@
+import { createClient } from '@supabase/supabase-js'
+import type { Database } from '@/types/database'
+
+const supabaseUrl = import.meta.env.VITE_SUPABASE_URL
+const supabaseAnonKey = import.meta.env.VITE_SUPABASE_ANON_KEY
+const supabaseSchema = import.meta.env.VITE_SUPABASE_SCHEMA ?? 'reserva_hotel'
+
+if (!supabaseUrl || !supabaseAnonKey) {
+  throw new Error(
+    'Variáveis VITE_SUPABASE_URL e VITE_SUPABASE_ANON_KEY não estão definidas. Copie .env.local.example para .env.local e preencha.'
+  )
+}
+
+export const supabase = createClient<Database>(supabaseUrl, supabaseAnonKey, {
+  db: { schema: supabaseSchema as 'reserva_hotel' },
+})
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
new file mode 100644
index 0000000..fed2fe9
--- /dev/null
+++ b/src/lib/utils.ts
@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from 'clsx'
+import { twMerge } from 'tailwind-merge'
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}
diff --git a/src/types/database.ts b/src/types/database.ts
new file mode 100644
index 0000000..803a659
--- /dev/null
+++ b/src/types/database.ts
@@ -0,0 +1,15 @@
+// Este arquivo é gerado automaticamente via `pnpm supabase:types`.
+// Não edite à mão. Regenerar após cada migration.
+// Placeholder inicial — Task 6 substitui com tipos reais.
+
+export type Json = string | number | boolean | null | { [key: string]: Json | undefined } | Json[]
+
+export type Database = {
+  reserva_hotel: {
+    Tables: Record<string, never>
+    Views: Record<string, never>
+    Functions: Record<string, never>
+    Enums: Record<string, never>
+    CompositeTypes: Record<string, never>
+  }
+}
diff --git a/tsconfig.app.json b/tsconfig.app.json
index 521c7b2..7b7c192 100644
--- a/tsconfig.app.json
+++ b/tsconfig.app.json
@@ -19,7 +19,7 @@
     "paths": {
       "@/*": ["./src/*"]
     },
-    "types": ["vitest/globals", "@testing-library/jest-dom"]
+    "types": ["vite/client", "vitest/globals", "@testing-library/jest-dom"]
   },
   "include": ["src"]
 }