Support thinking in cli integration (#1350)

* Support thinking in cli integration

* use CopilotCLIToolNames enum.

Author: rebornix

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

@@ -13,11 +13,11 @@ import { IWorkspaceService } from '../../../../platform/workspace/common/workspa
 import { CancellationToken } from '../../../../util/vs/base/common/cancellation';
 import { Disposable } from '../../../../util/vs/base/common/lifecycle';
 import { IInstantiationService } from '../../../../util/vs/platform/instantiation/common/instantiation';
-import { LanguageModelTextPart } from '../../../../vscodeTypes';
+import { ChatResponseThinkingProgressPart, LanguageModelTextPart } from '../../../../vscodeTypes';
 import { ToolName } from '../../../tools/common/toolNames';
 import { IToolsService } from '../../../tools/common/toolsService';
 import { ICopilotCLISessionService } from './copilotcliSessionService';
-import { createCopilotCLIToolInvocation, PermissionRequest } from './copilotcliToolInvocationFormatter';
+import { CopilotCLIToolNames, createCopilotCLIToolInvocation, PermissionRequest } from './copilotcliToolInvocationFormatter';
 import { ensureNodePtyShim } from './nodePtyShim';
 
 export class CopilotCLIAgentManager extends Disposable {
@@ -187,6 +187,15 @@ export class CopilotCLISession extends Disposable {
 			}
 			case 'tool_result': {
 				const toolCallId = event.toolCallId;
+
+				if (event.toolName === CopilotCLIToolNames.Think) {
+					const sessionLog = event.result.sessionLog;
+					if (sessionLog && typeof sessionLog === 'string') {
+						stream.push(new ChatResponseThinkingProgressPart(sessionLog));
+					}
+					break;
+				}
+
 				let invocation = toolCallId ? this._pendingToolInvocations.get(toolCallId) : undefined;
 
 				if (!invocation) {

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

@@ -8,14 +8,15 @@ import * as l10n from '@vscode/l10n';
 import type { ChatCompletionMessageParam } from 'openai/resources/chat/completions';
 import type { ExtendedChatResponsePart } from 'vscode';
 import { URI } from '../../../../util/vs/base/common/uri';
-import { ChatRequestTurn2, ChatResponseMarkdownPart, ChatResponseTurn2, ChatToolInvocationPart, MarkdownString } from '../../../../vscodeTypes';
+import { ChatRequestTurn2, ChatResponseMarkdownPart, ChatResponseThinkingProgressPart, ChatResponseTurn2, ChatToolInvocationPart, MarkdownString } from '../../../../vscodeTypes';
 
 /**
  * CopilotCLI tool names
  */
-const enum CopilotCLIToolNames {
+export const enum CopilotCLIToolNames {
 	StrReplaceEditor = 'str_replace_editor',
-	Bash = 'bash'
+	Bash = 'bash',
+	Think = 'think'
 }
 
 interface StrReplaceEditorArgs {
@@ -145,13 +146,22 @@ export function buildChatHistoryFromEvents(events: readonly SDKEvent[]): (ChatRe
 				currentResponseParts.push(toolInvocation);
 			}
 		} else if (event.type === 'tool_result') {
-			// Update the pending tool invocation with the result
-			if (event.toolCallId) {
-				const invocation = pendingToolInvocations.get(event.toolCallId);
-				if (invocation) {
-					invocation.isConfirmed = event.result.resultType !== 'rejected' && event.result.resultType !== 'denied';
-					invocation.isError = event.result.resultType === 'failure';
-					pendingToolInvocations.delete(event.toolCallId);
+			if (event.toolName === CopilotCLIToolNames.Think) {
+				const sessionLog = event.result.sessionLog;
+				if (sessionLog && typeof sessionLog === 'string') {
+					currentResponseParts.push(
+						new ChatResponseThinkingProgressPart(sessionLog)
+					);
+				}
+			} else {
+				// Update the pending tool invocation with the result
+				if (event.toolCallId) {
+					const invocation = pendingToolInvocations.get(event.toolCallId);
+					if (invocation) {
+						invocation.isConfirmed = event.result.resultType !== 'rejected' && event.result.resultType !== 'denied';
+						invocation.isError = event.result.resultType === 'failure';
+						pendingToolInvocations.delete(event.toolCallId);
+					}
 				}
 			}
 			// Tool results themselves are not displayed - they update the invocation state