fix(coding-agent): clarify session ID docs closes #3390

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

@@ -1879,6 +1879,9 @@ export class InteractiveMode {
 					this.pendingWorkingMessage = message;
 				}
 			},
+			setWorkingIndicator: () => {
+				// Working indicator customization not implemented in interactive mode yet.
+			},
 			setHiddenThinkingLabel: (label) => this.setHiddenThinkingLabel(label),
 			setWidget: (key, content, options) => this.setExtensionWidget(key, content, options),
 			setFooter: (factory) => this.setExtensionFooter(factory),

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

@@ -172,6 +172,10 @@ export async function runRpcMode(runtimeHost: AgentSessionRuntime): Promise<neve
 			// Working message not supported in RPC mode - requires TUI loader access
 		},
 
+		setWorkingIndicator(): void {
+			// Working indicator customization not supported in RPC mode - requires TUI loader access
+		},
+
 		setHiddenThinkingLabel(_label?: string): void {
 			// Hidden thinking label not supported in RPC mode - requires TUI message rendering access
 		},