made system changes

.env.example

@@ -0,0 +1,28 @@
+# Supabase — get from https://supabase.com/dashboard/project/<project>/settings/api
+NEXT_PUBLIC_SUPABASE_URL=
+NEXT_PUBLIC_SUPABASE_ANON_KEY=
+SUPABASE_SERVICE_ROLE_KEY=
+
+# Anthropic — https://console.anthropic.com/settings/keys
+# Never expose this in the browser bundle — server-side only
+ANTHROPIC_API_KEY=
+
+# Clerk — https://dashboard.clerk.com
+CLERK_PUBLISHABLE_KEY=
+CLERK_SECRET_KEY=
+
+# Liveblocks (Phase 3) — https://liveblocks.io/dashboard
+LIVEBLOCKS_SECRET_KEY=
+
+# Linear integration
+LINEAR_WEBHOOK_SECRET=
+
+# Slack integration
+SLACK_BOT_TOKEN=
+SLACK_SIGNING_SECRET=
+
+# Agent Bridge WebSocket server port
+AGENT_BRIDGE_PORT=3001
+
+# App base URL
+NEXT_PUBLIC_APP_URL=http://localhost:3000