Add extracted source directory and README navigation

extracted-source/node_modules/@anthropic-ai/sdk/internal/request-options.mjs

@@ -0,0 +1,10 @@
+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+export const FallbackEncoder = ({ headers, body }) => {
+    return {
+        bodyHeaders: {
+            'content-type': 'application/json',
+        },
+        body: JSON.stringify(body),
+    };
+};
+//# sourceMappingURL=request-options.mjs.map