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node_modules/@ag-ui/encoder/README.md

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+# @ag-ui/encoder
+
+Event encoding utilities for the **Agent-User Interaction (AG-UI) Protocol**.
+
+`@ag-ui/encoder` handles content negotiation and format encoding for AG-UI events. It automatically chooses between Server-Sent Events (JSON) and Protocol Buffers based on client `Accept` headers, ensuring optimal transport efficiency.
+
+## Installation
+
+```bash
+npm install @ag-ui/encoder
+pnpm add @ag-ui/encoder
+yarn add @ag-ui/encoder
+```
+
+## Features
+
+- 🎯 **Content negotiation** – Automatic format selection based on `Accept` headers
+- 📦 **Dual encoding** – SSE (JSON) and Protocol Buffer support
+- ⚡ **Efficient binary** – Length-prefixed protobuf encoding for high-throughput scenarios
+- 🔄 **Seamless fallback** – Graceful degradation to SSE when protobuf isn't supported
+
+## Quick example
+
+```ts
+import { EventEncoder } from "@ag-ui/encoder";
+import { EventType } from "@ag-ui/core";
+
+const encoder = new EventEncoder({
+  accept: "application/vnd.ag-ui.event+proto, text/event-stream",
+});
+
+const event = {
+  type: EventType.TEXT_MESSAGE_CONTENT,
+  messageId: "msg_123",
+  delta: "Hello, world!",
+};
+
+// Returns protobuf-encoded binary data
+const encoded = encoder.encodeBinary(event);
+```
+
+## Documentation
+
+- Concepts & architecture: [`docs/concepts`](https://docs.ag-ui.com/concepts/architecture)
+- Full API reference: [`docs/sdk/js/encoder`](https://docs.ag-ui.com/sdk/js/encoder)
+
+## Contributing
+
+Bug reports and pull requests are welcome! Please read our [contributing guide](https://docs.ag-ui.com/development/contributing) first.
+
+## License
+
+MIT © 2025 AG-UI Protocol Contributors