diff --git a/vault/lib/types.ts b/vault/lib/types.ts
new file mode 100644
index 0000000..19a34e4
--- /dev/null
+++ b/vault/lib/types.ts
@@ -0,0 +1,47 @@
+export type PrivacyType = "secret" | "password";
+
+export type Expiration = "never" | "1h" | "1d" | "1w";
+
+export interface Snippet {
+  id: string;
+  title: string;
+  code: string;
+  language: string;
+  privacy: PrivacyType;
+  expiration: Expiration;
+  expiresAt?: string | null;
+  tags: string[];
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface User {
+  id: string;
+  username: string;
+  name: string;
+  createdAt: string;
+}
+
+export const LANGUAGES = [
+  "javascript",
+  "typescript",
+  "python",
+  "html",
+  "css",
+  "json",
+  "markdown",
+  "rust",
+  "go",
+  "java",
+  "cpp",
+  "xml",
+  "php",
+  "plaintext",
+] as const;
+
+export const EXPIRATION_OPTIONS: { value: Expiration; label: string }[] = [
+  { value: "never", label: "Never" },
+  { value: "1h", label: "1 hour" },
+  { value: "1d", label: "1 day" },
+  { value: "1w", label: "1 week" },
+];