feat: asa.news RSS reader with developer tier, REST API, and webhooks

Full-stack RSS reader SaaS: Supabase + Next.js + Go worker.
Includes three subscription tiers (free/pro/developer), API key auth,
read-only REST API, webhook push notifications, Stripe billing with
proration, and PWA support.

1 files changed, 45 insertions, 0 deletions

diff --git a/packages/shared/source/index.ts b/packages/shared/source/index.ts
new file mode 100644
index 0000000..a8108fd
--- /dev/null
+++ b/packages/shared/source/index.ts
@@ -0,0 +1,45 @@
+export const APPLICATION_NAME = "asa.news"
+
+export const TIER_LIMITS = {
+  free: {
+    maximumFeeds: 10,
+    maximumFolders: 3,
+    maximumMutedKeywords: 5,
+    maximumCustomFeeds: 1,
+    historyRetentionDays: 14,
+    refreshIntervalSeconds: 1800,
+    allowsAuthenticatedFeeds: false,
+    allowsExport: false,
+    allowsManualRefresh: false,
+    allowsApiAccess: false,
+    allowsWebhooks: false,
+  },
+  pro: {
+    maximumFeeds: 200,
+    maximumFolders: 10000,
+    maximumMutedKeywords: 10000,
+    maximumCustomFeeds: 1000,
+    historyRetentionDays: Infinity,
+    refreshIntervalSeconds: 300,
+    allowsAuthenticatedFeeds: true,
+    allowsExport: true,
+    allowsManualRefresh: true,
+    allowsApiAccess: false,
+    allowsWebhooks: false,
+  },
+  developer: {
+    maximumFeeds: 500,
+    maximumFolders: 10000,
+    maximumMutedKeywords: 10000,
+    maximumCustomFeeds: 1000,
+    historyRetentionDays: Infinity,
+    refreshIntervalSeconds: 300,
+    allowsAuthenticatedFeeds: true,
+    allowsExport: true,
+    allowsManualRefresh: true,
+    allowsApiAccess: true,
+    allowsWebhooks: true,
+  },
+} as const
+
+export type SubscriptionTier = keyof typeof TIER_LIMITS