fix(coding-agent): properly queue extension messages (#2674)

packages/coding-agent/src/core/agent-session.ts

@@ -112,6 +112,11 @@ export function parseSkillBlock(text: string): ParsedSkillBlock | null {
 /** Session-specific events that extend the core AgentEvent */
 export type AgentSessionEvent =
 	| AgentEvent
+	| {
+			type: "queue_update";
+			steering: readonly string[];
+			followUp: readonly string[];
+	  }
 	| { type: "compaction_start"; reason: "manual" | "threshold" | "overflow" }
 	| {
 			type: "compaction_end";
@@ -414,6 +419,14 @@ export class AgentSession {
 		}
 	}
 
+	private _emitQueueUpdate(): void {
+		this._emit({
+			type: "queue_update",
+			steering: [...this._steeringMessages],
+			followUp: [...this._followUpMessages],
+		});
+	}
+
 	// Track last assistant message for auto-compaction check
 	private _lastAssistantMessage: AssistantMessage | undefined = undefined;
 
@@ -476,11 +489,13 @@ export class AgentSession {
 				const steeringIndex = this._steeringMessages.indexOf(messageText);
 				if (steeringIndex !== -1) {
 					this._steeringMessages.splice(steeringIndex, 1);
+					this._emitQueueUpdate();
 				} else {
 					// Check follow-up queue
 					const followUpIndex = this._followUpMessages.indexOf(messageText);
 					if (followUpIndex !== -1) {
 						this._followUpMessages.splice(followUpIndex, 1);
+						this._emitQueueUpdate();
 					}
 				}
 			}
@@ -1155,6 +1170,7 @@ export class AgentSession {
 	 */
 	private async _queueSteer(text: string, images?: ImageContent[]): Promise<void> {
 		this._steeringMessages.push(text);
+		this._emitQueueUpdate();
 		const content: (TextContent | ImageContent)[] = [{ type: "text", text }];
 		if (images) {
 			content.push(...images);
@@ -1171,6 +1187,7 @@ export class AgentSession {
 	 */
 	private async _queueFollowUp(text: string, images?: ImageContent[]): Promise<void> {
 		this._followUpMessages.push(text);
+		this._emitQueueUpdate();
 		const content: (TextContent | ImageContent)[] = [{ type: "text", text }];
 		if (images) {
 			content.push(...images);
@@ -1282,7 +1299,7 @@ export class AgentSession {
 			expandPromptTemplates: false,
 			streamingBehavior: options?.deliverAs,
 			images,
-			source: "extension",
+			source: "interactive",
 		});
 	}
 
@@ -1297,6 +1314,7 @@ export class AgentSession {
 		this._steeringMessages = [];
 		this._followUpMessages = [];
 		this.agent.clearAllQueues();
+		this._emitQueueUpdate();
 		return { steering, followUp };
 	}