feat: add openTabsAtEndOfList setting to control tab placement

- Add openTabsAtEndOfList setting to global-settings schema with default value false
- Update ClineProvider to include the setting in state management
- Modify DiffViewProvider to use ViewColumn.Beside when setting is enabled
- Add test coverage for the new setting

Fixes #6006

Author: roomote

packages/types/src/__tests__/index.test.ts

@@ -22,4 +22,8 @@ describe("GLOBAL_STATE_KEYS", () => {
 	it("should not contain OpenAI Compatible API key (secret)", () => {
 		expect(GLOBAL_STATE_KEYS).not.toContain("codebaseIndexOpenAiCompatibleApiKey")
 	})
+
+	it("should contain openTabsAtEndOfList setting", () => {
+		expect(GLOBAL_STATE_KEYS).toContain("openTabsAtEndOfList")
+	})
 })

packages/types/src/global-settings.ts

@@ -108,6 +108,7 @@ export const globalSettingsSchema = z.object({
 	rateLimitSeconds: z.number().optional(),
 	diffEnabled: z.boolean().optional(),
 	fuzzyMatchThreshold: z.number().optional(),
+	openTabsAtEndOfList: z.boolean().optional(),
 	experiments: experimentsSchema.optional(),
 
 	codebaseIndexModels: codebaseIndexModelsSchema.optional(),
@@ -251,6 +252,7 @@ export const EVALS_SETTINGS: RooCodeSettings = {
 
 	diffEnabled: true,
 	fuzzyMatchThreshold: 1,
+	openTabsAtEndOfList: false,
 
 	enableCheckpoints: false,
 

src/core/task/Task.ts

@@ -260,7 +260,21 @@ export class Task extends EventEmitter<ClineEvents> {
 		this.consecutiveMistakeLimit = consecutiveMistakeLimit ?? DEFAULT_CONSECUTIVE_MISTAKE_LIMIT
 		this.providerRef = new WeakRef(provider)
 		this.globalStoragePath = provider.context.globalStorageUri.fsPath
-		this.diffViewProvider = new DiffViewProvider(this.cwd)
+
+		// Get openTabsAtEndOfList setting asynchronously
+		provider
+			.getState()
+			.then((state) => {
+				const openTabsAtEndOfList = state?.openTabsAtEndOfList ?? false
+				this.diffViewProvider = new DiffViewProvider(this.cwd, openTabsAtEndOfList)
+			})
+			.catch((error) => {
+				console.error("Failed to get openTabsAtEndOfList setting:", error)
+				this.diffViewProvider = new DiffViewProvider(this.cwd, false)
+			})
+
+		// Initialize with default value for immediate use
+		this.diffViewProvider = new DiffViewProvider(this.cwd, false)
 		this.enableCheckpoints = enableCheckpoints
 
 		this.rootTask = rootTask

src/core/webview/ClineProvider.ts

@@ -1440,6 +1440,7 @@ export class ClineProvider
 			alwaysAllowFollowupQuestions,
 			followupAutoApproveTimeoutMs,
 			diagnosticsEnabled,
+			openTabsAtEndOfList,
 		} = await this.getState()
 
 		const telemetryKey = process.env.POSTHOG_API_KEY
@@ -1561,6 +1562,7 @@ export class ClineProvider
 			alwaysAllowFollowupQuestions: alwaysAllowFollowupQuestions ?? false,
 			followupAutoApproveTimeoutMs: followupAutoApproveTimeoutMs ?? 60000,
 			diagnosticsEnabled: diagnosticsEnabled ?? true,
+			openTabsAtEndOfList: openTabsAtEndOfList ?? false,
 		}
 	}
 
@@ -1726,6 +1728,7 @@ export class ClineProvider
 				codebaseIndexSearchMinScore: stateValues.codebaseIndexConfig?.codebaseIndexSearchMinScore,
 			},
 			profileThresholds: stateValues.profileThresholds ?? {},
+			openTabsAtEndOfList: stateValues.openTabsAtEndOfList ?? false,
 		}
 	}
 

src/integrations/editor/DiffViewProvider.ts

@@ -36,8 +36,14 @@ export class DiffViewProvider {
 	private activeLineController?: DecorationController
 	private streamedLines: string[] = []
 	private preDiagnostics: [vscode.Uri, vscode.Diagnostic[]][] = []
+	private openTabsAtEndOfList: boolean
 
-	constructor(private cwd: string) {}
+	constructor(
+		private cwd: string,
+		openTabsAtEndOfList: boolean = false,
+	) {
+		this.openTabsAtEndOfList = openTabsAtEndOfList
+	}
 
 	async open(relPath: string): Promise<void> {
 		this.relPath = relPath
@@ -181,7 +187,10 @@ export class DiffViewProvider {
 		}
 	}
 
-	async saveChanges(diagnosticsEnabled: boolean = true, writeDelayMs: number = DEFAULT_WRITE_DELAY_MS): Promise<{
+	async saveChanges(
+		diagnosticsEnabled: boolean = true,
+		writeDelayMs: number = DEFAULT_WRITE_DELAY_MS,
+	): Promise<{
 		newProblemsMessage: string | undefined
 		userEdits: string | undefined
 		finalContent: string | undefined
@@ -198,7 +207,11 @@ export class DiffViewProvider {
 			await updatedDocument.save()
 		}
 
-		await vscode.window.showTextDocument(vscode.Uri.file(absolutePath), { preview: false, preserveFocus: true })
+		await vscode.window.showTextDocument(vscode.Uri.file(absolutePath), {
+			preview: false,
+			preserveFocus: true,
+			viewColumn: this.openTabsAtEndOfList ? vscode.ViewColumn.Beside : vscode.ViewColumn.Active,
+		})
 		await this.closeAllDiffViews()
 
 		// Getting diagnostics before and after the file edit is a better approach than
@@ -216,22 +229,22 @@ export class DiffViewProvider {
 		// and can address them accordingly. If problems don't change immediately after
 		// applying a fix, won't be notified, which is generally fine since the
 		// initial fix is usually correct and it may just take time for linters to catch up.
-		
+
 		let newProblemsMessage = ""
-		
+
 		if (diagnosticsEnabled) {
 			// Add configurable delay to allow linters time to process and clean up issues
 			// like unused imports (especially important for Go and other languages)
 			// Ensure delay is non-negative
 			const safeDelayMs = Math.max(0, writeDelayMs)
-			
+
 			try {
 				await delay(safeDelayMs)
 			} catch (error) {
 				// Log error but continue - delay failure shouldn't break the save operation
 				console.warn(`Failed to apply write delay: ${error}`)
 			}
-			
+
 			const postDiagnostics = vscode.languages.getDiagnostics()
 
 			const newProblems = await diagnosticsToProblemsString(
@@ -391,6 +404,7 @@ export class DiffViewProvider {
 				await vscode.window.showTextDocument(vscode.Uri.file(absolutePath), {
 					preview: false,
 					preserveFocus: true,
+					viewColumn: this.openTabsAtEndOfList ? vscode.ViewColumn.Beside : vscode.ViewColumn.Active,
 				})
 			}
 
@@ -523,7 +537,11 @@ export class DiffViewProvider {
 			// Pre-open the file as a text document to ensure it doesn't open in preview mode
 			// This fixes issues with files that have custom editor associations (like markdown preview)
 			vscode.window
-				.showTextDocument(uri, { preview: false, viewColumn: vscode.ViewColumn.Active, preserveFocus: true })
+				.showTextDocument(uri, {
+					preview: false,
+					viewColumn: this.openTabsAtEndOfList ? vscode.ViewColumn.Beside : vscode.ViewColumn.Active,
+					preserveFocus: true,
+				})
 				.then(() => {
 					// Execute the diff command after ensuring the file is open as text
 					return vscode.commands.executeCommand(
@@ -533,7 +551,10 @@ export class DiffViewProvider {
 						}),
 						uri,
 						`${fileName}: ${fileExists ? `${DIFF_VIEW_LABEL_CHANGES}` : "New File"} (Editable)`,
-						{ preserveFocus: true },
+						{
+							preserveFocus: true,
+							viewColumn: this.openTabsAtEndOfList ? vscode.ViewColumn.Beside : undefined,
+						},
 					)
 				})
 				.then(