feat(packages): Add selective pi-ai base entrypoints (#5348)

packages/ai/src/providers/anthropic.ts

@@ -7,6 +7,7 @@ import type {
 	RawMessageStreamEvent,
 	RefusalStopDetails,
 } from "@anthropic-ai/sdk/resources/messages.js";
+import { registerApiProvider } from "../api-registry.ts";
 import { calculateCost } from "../models.ts";
 import type {
 	AnthropicMessagesCompat,
@@ -786,6 +787,14 @@ export const streamSimpleAnthropic: StreamFunction<"anthropic-messages", SimpleS
 	} satisfies AnthropicOptions);
 };
 
+export function register(): void {
+	registerApiProvider({
+		api: "anthropic-messages",
+		stream: streamAnthropic,
+		streamSimple: streamSimpleAnthropic,
+	});
+}
+
 function isOAuthToken(apiKey: string): boolean {
 	return apiKey.includes("sk-ant-oat");
 }