fix: expose abort signal to extensions closes #2660

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -1280,6 +1280,7 @@ export class InteractiveMode {
 			modelRegistry: this.session.modelRegistry,
 			model: this.session.model,
 			isIdle: () => !this.session.isStreaming,
+			signal: this.session.agent.signal,
 			abort: () => this.session.abort(),
 			hasPendingMessages: () => this.session.pendingMessageCount > 0,
 			shutdown: () => {