move pi-mono into companion-cloud as apps/companion-os

- Copy all pi-mono source into apps/companion-os/
- Update Dockerfile to COPY pre-built binary instead of downloading from GitHub Releases
- Update deploy-staging.yml to build pi from source (bun compile) before Docker build
- Add apps/companion-os/** to path triggers
- No more cross-repo dispatch needed

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/ai/src/stream.ts

@@ -0,0 +1,59 @@
+import "./providers/register-builtins.js";
+
+import { getApiProvider } from "./api-registry.js";
+import type {
+  Api,
+  AssistantMessage,
+  AssistantMessageEventStream,
+  Context,
+  Model,
+  ProviderStreamOptions,
+  SimpleStreamOptions,
+  StreamOptions,
+} from "./types.js";
+
+export { getEnvApiKey } from "./env-api-keys.js";
+
+function resolveApiProvider(api: Api) {
+  const provider = getApiProvider(api);
+  if (!provider) {
+    throw new Error(`No API provider registered for api: ${api}`);
+  }
+  return provider;
+}
+
+export function stream<TApi extends Api>(
+  model: Model<TApi>,
+  context: Context,
+  options?: ProviderStreamOptions,
+): AssistantMessageEventStream {
+  const provider = resolveApiProvider(model.api);
+  return provider.stream(model, context, options as StreamOptions);
+}
+
+export async function complete<TApi extends Api>(
+  model: Model<TApi>,
+  context: Context,
+  options?: ProviderStreamOptions,
+): Promise<AssistantMessage> {
+  const s = stream(model, context, options);
+  return s.result();
+}
+
+export function streamSimple<TApi extends Api>(
+  model: Model<TApi>,
+  context: Context,
+  options?: SimpleStreamOptions,
+): AssistantMessageEventStream {
+  const provider = resolveApiProvider(model.api);
+  return provider.streamSimple(model, context, options);
+}
+
+export async function completeSimple<TApi extends Api>(
+  model: Model<TApi>,
+  context: Context,
+  options?: SimpleStreamOptions,
+): Promise<AssistantMessage> {
+  const s = streamSimple(model, context, options);
+  return s.result();
+}