diff --git a/src/lib/store-catalog.ts b/src/lib/store-catalog.ts
new file mode 100644
index 0000000..56faea6
--- /dev/null
+++ b/src/lib/store-catalog.ts
@@ -0,0 +1,87 @@
+// Storefront catalog for the dashboard upsell modal.
+//
+// SKUs and prices DUPLICATE payment-router/products.yaml (and the landing
+// pages) — the server always charges the catalog price by SKU, so a stale
+// price here is a display bug, not a money bug. When a price changes:
+// products.yaml → landing → this file.
+
+export interface StoreTariff {
+  sku: string; // must match payment-router/products.yaml
+  label: string;
+  priceRub: number; // display only; the charge is resolved server-side
+  includes?: string; // short "what's inside" caption under the label
+}
+
+export interface StoreCatalogEntry {
+  landingUrl: string;
+  tariffs: StoreTariff[];
+}
+
+export const PAY_ORDER_URL = "https://obsidian.second-brain.ru/pay/order";
+export const PAY_METHODS_URL = "https://obsidian.second-brain.ru/pay/methods";
+
+// Keys = course slugs shown as locked cards on the student dashboard.
+// Only tariffs of the course's "native" landing are listed — cross-bundles
+// from other landings would confuse the choice.
+export const STORE_CATALOG: Record<string, StoreCatalogEntry> = {
+  "second-brain-vault": {
+    landingUrl: "https://second-brain.ru/sb-vault",
+    tariffs: [{ sku: "sb-vault", label: "Second Brain Vault", priceRub: 2990 }],
+  },
+  "claude-obsidian": {
+    landingUrl: "https://second-brain.ru/claude-obsidian",
+    tariffs: [{ sku: "claude-obsidian", label: "Claude + Obsidian", priceRub: 4990 }],
+  },
+  "obsidian-full": {
+    landingUrl: "https://obsidian.second-brain.ru/",
+    tariffs: [
+      {
+        sku: "obsidian-pro",
+        label: "Obsidian + AI",
+        priceRub: 14990,
+        includes: "Включает курс «Obsidian + AI» и Second Brain Vault",
+      },
+      {
+        sku: "obsidian-architect",
+        label: "Архитектор знаний",
+        priceRub: 17990,
+        includes: "Плюс курс «Zotero. Всё включено»",
+      },
+    ],
+  },
+  "zotero-full": {
+    landingUrl: "https://zotero.second-brain.ru/",
+    tariffs: [
+      {
+        sku: "zotero-analyst",
+        label: "Аналитик",
+        priceRub: 10990,
+        includes: "Включает курс «Obsidian. Всё включено»",
+      },
+      {
+        sku: "zotero-max",
+        label: "Второй мозг на максималках",
+        priceRub: 17990,
+        includes: "Плюс курс «Obsidian + AI» и Second Brain Vault",
+      },
+    ],
+  },
+  "obsidian-ai": {
+    landingUrl: "https://obsidianai.second-brain.ru/",
+    tariffs: [
+      { sku: "obsidianai-base", label: "База", priceRub: 6990 },
+      {
+        sku: "obsidianai-expert",
+        label: "AI Эксперт",
+        priceRub: 14990,
+        includes: "Включает курс «Obsidian. Всё включено» и Second Brain Vault",
+      },
+      {
+        sku: "obsidianai-researcher",
+        label: "AI Исследователь",
+        priceRub: 17990,
+        includes: "Плюс курс «Zotero. Всё включено»",
+      },
+    ],
+  },
+};