feat(coding-agent): add configurable working indicator closes #3413

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

@@ -17,6 +17,7 @@ import type {
 	ExtensionUIContext,
 	ExtensionUIDialogOptions,
 	ExtensionWidgetOptions,
+	WorkingIndicatorOptions,
 } from "../../core/extensions/index.js";
 import { takeOverStdout, writeRawStdout } from "../../core/output-guard.js";
 import { killTrackedDetachedChildren } from "../../utils/shell.js";
@@ -172,7 +173,7 @@ export async function runRpcMode(runtimeHost: AgentSessionRuntime): Promise<neve
 			// Working message not supported in RPC mode - requires TUI loader access
 		},
 
-		setWorkingIndicator(): void {
+		setWorkingIndicator(_options?: WorkingIndicatorOptions): void {
 			// Working indicator customization not supported in RPC mode - requires TUI loader access
 		},
 
@@ -617,7 +618,7 @@ export async function runRpcMode(runtimeHost: AgentSessionRuntime): Promise<neve
 			case "get_commands": {
 				const commands: RpcSlashCommand[] = [];
 
-				for (const command of session.extensionRunner?.getRegisteredCommands() ?? []) {
+				for (const command of session.extensionRunner.getRegisteredCommands()) {
 					commands.push({
 						name: command.invocationName,
 						description: command.description,