Add VSC Model B prompt variants (#1650)

* Add VSC Model B prompt variants

* improved vsc model A and vsc model B system prompt

---------

Co-authored-by: AbdelrahmanAbouelenin <abdelrahman.abouelenin@gmail.com>

Author: AbdelrahmanAbouelenin

src/extension/prompts/node/agent/agentPrompt.tsx

@@ -7,7 +7,7 @@ import { BasePromptElementProps, Chunk, Image, PromptElement, PromptPiece, Promp
 import type { ChatRequestEditedFileEvent, LanguageModelToolInformation, NotebookEditor, TaskDefinition, TextEditor } from 'vscode';
 import { ChatLocation } from '../../../../platform/chat/common/commonTypes';
 import { ConfigKey, IConfigurationService } from '../../../../platform/configuration/common/configurationService';
-import { isVSCModel, modelNeedsStrongReplaceStringHint } from '../../../../platform/endpoint/common/chatModelCapabilities';
+import { isVSCModelA, modelNeedsStrongReplaceStringHint } from '../../../../platform/endpoint/common/chatModelCapabilities';
 import { CacheType } from '../../../../platform/endpoint/common/endpointTypes';
 import { IEnvService, OperatingSystem } from '../../../../platform/env/common/envService';
 import { getGitHubRepoInfoFromContext, IGitService } from '../../../../platform/git/common/gitService';
@@ -323,7 +323,7 @@ export class AgentUserMessage extends PromptElement<AgentUserMessageProps> {
 			this.logService.trace('Re-rendering historical user message');
 		}
 
-		const shouldIncludePreamble = await isVSCModel(this.props.endpoint);
+		const shouldIncludePreamble = await isVSCModelA(this.props.endpoint);
 
 		const query = await this.promptVariablesService.resolveToolReferencesInPrompt(this.props.request, this.props.toolReferences ?? []);
 		const hasReplaceStringTool = !!this.props.availableTools?.find(tool => tool.name === ToolName.ReplaceString);