feat: improve PowerShell terminal command completion detection

- Add PowerShellPromptDetector module for enhanced prompt pattern detection
- Add CompletionMarkers module for explicit START/END command markers
- Integrate both detection methods into TerminalProcess
- Add configuration options for users to enable/disable features
- Add comprehensive tests for new functionality

This addresses timing issues with PowerShell terminal command completion
detection by providing two complementary approaches:
1. Enhanced prompt detection that recognizes various PowerShell prompts
2. Explicit completion markers that wrap commands with START/END markers

Fixes #8446

Author: roomote

packages/types/src/global-settings.ts

@@ -121,6 +121,9 @@ export const globalSettingsSchema = z.object({
 	terminalZshP10k: z.boolean().optional(),
 	terminalZdotdir: z.boolean().optional(),
 	terminalCompressProgressBar: z.boolean().optional(),
+	terminalCompletionMarkersEnabled: z.boolean().optional(),
+	terminalPromptDetectionEnabled: z.boolean().optional(),
+	terminalCustomPromptPatterns: z.string().optional(),
 
 	diagnosticsEnabled: z.boolean().optional(),
 
@@ -294,6 +297,9 @@ export const EVALS_SETTINGS: RooCodeSettings = {
 	terminalZdotdir: true,
 	terminalCompressProgressBar: true,
 	terminalShellIntegrationDisabled: true,
+	terminalCompletionMarkersEnabled: false,
+	terminalPromptDetectionEnabled: false,
+	terminalCustomPromptPatterns: "",
 
 	diagnosticsEnabled: true,
 

src/core/webview/ClineProvider.ts

@@ -738,6 +738,9 @@ export class ClineProvider
 				terminalZshP10k = false,
 				terminalPowershellCounter = false,
 				terminalZdotdir = false,
+				terminalCompletionMarkersEnabled = false,
+				terminalPromptDetectionEnabled = false,
+				terminalCustomPromptPatterns = "",
 			}) => {
 				Terminal.setShellIntegrationTimeout(terminalShellIntegrationTimeout)
 				Terminal.setShellIntegrationDisabled(terminalShellIntegrationDisabled)
@@ -747,6 +750,9 @@ export class ClineProvider
 				Terminal.setTerminalZshP10k(terminalZshP10k)
 				Terminal.setPowershellCounter(terminalPowershellCounter)
 				Terminal.setTerminalZdotdir(terminalZdotdir)
+				Terminal.setCompletionMarkersEnabled(terminalCompletionMarkersEnabled)
+				Terminal.setPromptDetectionEnabled(terminalPromptDetectionEnabled)
+				Terminal.setCustomPromptPatterns(terminalCustomPromptPatterns)
 			},
 		)
 
@@ -1766,6 +1772,9 @@ export class ClineProvider
 			terminalZshOhMy,
 			terminalZshP10k,
 			terminalZdotdir,
+			terminalCompletionMarkersEnabled,
+			terminalPromptDetectionEnabled,
+			terminalCustomPromptPatterns,
 			fuzzyMatchThreshold,
 			mcpEnabled,
 			enableMcpServerCreation,
@@ -1892,6 +1901,9 @@ export class ClineProvider
 			terminalZshOhMy: terminalZshOhMy ?? false,
 			terminalZshP10k: terminalZshP10k ?? false,
 			terminalZdotdir: terminalZdotdir ?? false,
+			terminalCompletionMarkersEnabled: terminalCompletionMarkersEnabled ?? false,
+			terminalPromptDetectionEnabled: terminalPromptDetectionEnabled ?? false,
+			terminalCustomPromptPatterns: terminalCustomPromptPatterns ?? "",
 			fuzzyMatchThreshold: fuzzyMatchThreshold ?? 1.0,
 			mcpEnabled: mcpEnabled ?? true,
 			enableMcpServerCreation: enableMcpServerCreation ?? true,
@@ -2113,6 +2125,9 @@ export class ClineProvider
 			terminalZshOhMy: stateValues.terminalZshOhMy ?? false,
 			terminalZshP10k: stateValues.terminalZshP10k ?? false,
 			terminalZdotdir: stateValues.terminalZdotdir ?? false,
+			terminalCompletionMarkersEnabled: stateValues.terminalCompletionMarkersEnabled ?? false,
+			terminalPromptDetectionEnabled: stateValues.terminalPromptDetectionEnabled ?? false,
+			terminalCustomPromptPatterns: stateValues.terminalCustomPromptPatterns ?? "",
 			terminalCompressProgressBar: stateValues.terminalCompressProgressBar ?? true,
 			mode: stateValues.mode ?? defaultModeSlug,
 			language: stateValues.language ?? formatLanguage(vscode.env.language),

src/core/webview/webviewMessageHandler.ts

@@ -1461,6 +1461,27 @@ export const webviewMessageHandler = async (
 				Terminal.setCompressProgressBar(message.bool)
 			}
 			break
+		case "terminalCompletionMarkersEnabled":
+			await updateGlobalState("terminalCompletionMarkersEnabled", message.bool)
+			await provider.postStateToWebview()
+			if (message.bool !== undefined) {
+				Terminal.setCompletionMarkersEnabled(message.bool)
+			}
+			break
+		case "terminalPromptDetectionEnabled":
+			await updateGlobalState("terminalPromptDetectionEnabled", message.bool)
+			await provider.postStateToWebview()
+			if (message.bool !== undefined) {
+				Terminal.setPromptDetectionEnabled(message.bool)
+			}
+			break
+		case "terminalCustomPromptPatterns":
+			await updateGlobalState("terminalCustomPromptPatterns", message.text)
+			await provider.postStateToWebview()
+			if (message.text !== undefined) {
+				Terminal.setCustomPromptPatterns(message.text)
+			}
+			break
 		case "mode":
 			await provider.handleModeSwitch(message.text as Mode)
 			break

src/integrations/terminal/BaseTerminal.ts

@@ -160,6 +160,9 @@ export abstract class BaseTerminal implements RooTerminal {
 	private static terminalZshP10k: boolean = false
 	private static terminalZdotdir: boolean = false
 	private static compressProgressBar: boolean = true
+	private static completionMarkersEnabled: boolean = false
+	private static promptDetectionEnabled: boolean = false
+	private static customPromptPatterns: string = ""
 
 	/**
 	 * Compresses terminal output by applying run-length encoding and truncating to line limit
@@ -314,4 +317,52 @@ export abstract class BaseTerminal implements RooTerminal {
 	public static getCompressProgressBar(): boolean {
 		return BaseTerminal.compressProgressBar
 	}
+
+	/**
+	 * Sets whether to use completion markers for command detection
+	 * @param enabled Whether to enable completion markers
+	 */
+	public static setCompletionMarkersEnabled(enabled: boolean): void {
+		BaseTerminal.completionMarkersEnabled = enabled
+	}
+
+	/**
+	 * Gets whether completion markers are enabled
+	 * @returns Whether completion markers are enabled
+	 */
+	public static getCompletionMarkersEnabled(): boolean {
+		return BaseTerminal.completionMarkersEnabled
+	}
+
+	/**
+	 * Sets whether to use prompt detection for command completion
+	 * @param enabled Whether to enable prompt detection
+	 */
+	public static setPromptDetectionEnabled(enabled: boolean): void {
+		BaseTerminal.promptDetectionEnabled = enabled
+	}
+
+	/**
+	 * Gets whether prompt detection is enabled
+	 * @returns Whether prompt detection is enabled
+	 */
+	public static getPromptDetectionEnabled(): boolean {
+		return BaseTerminal.promptDetectionEnabled
+	}
+
+	/**
+	 * Sets custom prompt patterns for detection
+	 * @param patterns Custom prompt patterns (pipe-separated regex strings)
+	 */
+	public static setCustomPromptPatterns(patterns: string): void {
+		BaseTerminal.customPromptPatterns = patterns
+	}
+
+	/**
+	 * Gets custom prompt patterns
+	 * @returns Custom prompt patterns string
+	 */
+	public static getCustomPromptPatterns(): string {
+		return BaseTerminal.customPromptPatterns
+	}
 }