diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 0000000..98699fb
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,19 @@
+# blax-npm-networking
+
+## Overview
+Plug-and-play API + WebSocket client for Vue/Nuxt apps. Framework-agnostic core with optional bindings.
+
+## Build
+- `pnpm build` — builds via tsup to `dist/`
+- Exports: `.` (core), `./vue`, `./nuxt`, `./axios`
+
+## WebSocket
+- `createWsClient()` takes a URL and connects via native WebSocket
+- `createFromNuxtConfig()` reads `runtimeConfig.public` keys: `WEBS_URL`, `WS_PROTOCOL`, `PUSHER_APP_KEY`
+- App key default: `websocket` — generic identifier, same in all environments
+- URL format: `{protocol}://{host}/app/{appKey}`
+- Has built-in connection diagnostics: URL validation, 5s timeout for `connection_established`
+
+## Conventions
+- TypeScript strict mode
+- No environment-specific defaults — all config values should work across dev and prod
diff --git a/src/nuxt.ts b/src/nuxt.ts
index af1be0e..e6aa3cb 100644
--- a/src/nuxt.ts
+++ b/src/nuxt.ts
@@ -71,7 +71,7 @@ export function createFromNuxtConfig(options: NuxtNetworkingOptions = {}): {
   const serverUrlInternal: string = pub[serverUrlInternalKey] ?? ''
   const wsUrl: string = pub[wsUrlKey] ?? ''
   const wsProtocol: string = pub[wsProtocolKey] ?? 'wss'
-  const appKey: string = pub[appKeyConfigKey] ?? ''
+  const appKey: string = pub[appKeyConfigKey] ?? 'websocket'
 
   // @ts-expect-error Nuxt/Vite global
   const isServer: boolean = import.meta.server ?? false