fix cli thinking streaming (#1802)

Author: justschen

src/extension/agents/copilotcli/node/copilotcliSession.ts

@@ -200,6 +200,7 @@ export class CopilotCLISession extends DisposableStore implements ICopilotCLISes
 				}
 				if (responsePart instanceof ChatResponseThinkingProgressPart) {
 					stream.push(responsePart);
+					stream.push(new ChatResponseThinkingProgressPart('', '', { vscodeReasoningDone: true }));
 				}
 				this.logService.trace(`Start Tool ${event.data.toolName || '<unknown>'}`);
 				break;

src/extension/chatSessions/vscode-node/copilotCloudSessionContentBuilder.ts

@@ -245,6 +245,9 @@ export class ChatSessionContentBuilder {
 					const toolPart = this.createToolInvocationPart(pullRequest, toolCall, args.name || delta.content);
 					if (toolPart) {
 						responseParts.push(toolPart);
+						if (toolPart instanceof ChatResponseThinkingProgressPart) {
+							responseParts.push(new ChatResponseThinkingProgressPart('', '', { vscodeReasoningDone: true }));
+						}
 					}
 				}
 				// Skip if content is empty (running state)
@@ -267,6 +270,9 @@ export class ChatSessionContentBuilder {
 						const toolPart = this.createToolInvocationPart(pullRequest, toolCall, delta.content || '');
 						if (toolPart) {
 							responseParts.push(toolPart);
+							if (toolPart instanceof ChatResponseThinkingProgressPart) {
+								responseParts.push(new ChatResponseThinkingProgressPart('', '', { vscodeReasoningDone: true }));
+							}
 						}
 					}
 

src/extension/chatSessions/vscode-node/copilotCloudSessionsProvider.ts

@@ -841,6 +841,9 @@ export class CopilotCloudSessionsProvider extends Disposable implements vscode.C
 								if (toolPart) {
 									stream.push(toolPart);
 									hasStreamedContent = true;
+									if (toolPart instanceof vscode.ChatResponseThinkingProgressPart) {
+										stream.push(new vscode.ChatResponseThinkingProgressPart('', '', { vscodeReasoningDone: true }));
+									}
 								}
 							} else {
 								// Running setup step - just track progress
@@ -861,6 +864,9 @@ export class CopilotCloudSessionsProvider extends Disposable implements vscode.C
 									if (toolPart) {
 										stream.push(toolPart);
 										hasStreamedContent = true;
+										if (toolPart instanceof vscode.ChatResponseThinkingProgressPart) {
+											stream.push(new vscode.ChatResponseThinkingProgressPart('', '', { vscodeReasoningDone: true }));
+										}
 									}
 								}
 							}