diff --git a/vault/lib/storage.ts b/vault/lib/storage.ts
new file mode 100644
index 0000000..f58e1b2
--- /dev/null
+++ b/vault/lib/storage.ts
@@ -0,0 +1,37 @@
+import { Snippet } from "./types";
+import { MOCK_SNIPPETS } from "./mock-data";
+
+const STORAGE_KEY = "vault_snippets";
+
+export function getSnippets(): Snippet[] {
+  if (typeof window === "undefined") return [];
+  const stored = localStorage.getItem(STORAGE_KEY);
+  if (stored) return JSON.parse(stored);
+  return [];
+}
+
+export function saveSnippet(snippet: Snippet): void {
+  const snippets = getSnippets();
+  const idx = snippets.findIndex((s) => s.id === snippet.id);
+  if (idx >= 0) {
+    snippets[idx] = snippet;
+  } else {
+    snippets.unshift(snippet);
+  }
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(snippets));
+}
+
+export function getSnippet(id: string): Snippet | undefined {
+  return getSnippets().find((s) => s.id === id);
+}
+
+export function deleteSnippet(id: string): void {
+  const snippets = getSnippets().filter((s) => s.id !== id);
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(snippets));
+}
+
+export function initMockData(): void {
+  if (typeof window === "undefined") return;
+  if (localStorage.getItem(STORAGE_KEY)) return;
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(MOCK_SNIPPETS));
+}