sandbox connected and streaming

gateway/src/workspace/index.ts

@@ -62,6 +62,8 @@ export type {
   StoreConfig,
   ChannelAdapter,
   ChannelCapabilities,
+  ImageMessage,
+  TextMessage,
   PathTrigger,
   PathTriggerHandler,
   PathTriggerContext,

gateway/src/workspace/types.ts

@@ -131,6 +131,29 @@ export interface ChannelCapabilities {
   supportsTradingViewEmbed: boolean;
 }
 
+/**
+ * Image message for channel adapters.
+ * Contains base64-encoded image data from MCP tools.
+ */
+export interface ImageMessage {
+  /** Base64-encoded image data */
+  data: string;
+
+  /** MIME type (e.g., 'image/png', 'image/jpeg') */
+  mimeType: string;
+
+  /** Optional caption/description */
+  caption?: string;
+}
+
+/**
+ * Text message for channel adapters.
+ */
+export interface TextMessage {
+  /** Text content */
+  text: string;
+}
+
 /**
  * Adapter interface for communication channels.
  * Implemented by WebSocket handler, Telegram handler, etc.
@@ -142,6 +165,18 @@ export interface ChannelAdapter {
   /** Send an incremental patch to the client */
   sendPatch(msg: PatchMessage): void;
 
+  /** Send a text message to the client */
+  sendText(msg: TextMessage): void;
+
+  /** Send a streaming text chunk to the client */
+  sendChunk(content: string): void;
+
+  /** Send an image to the client */
+  sendImage(msg: ImageMessage): void;
+
+  /** Notify client that a tool call is being executed */
+  sendToolCall?(toolName: string, label?: string): void;
+
   /** Get channel capabilities */
   getCapabilities(): ChannelCapabilities;
 }