Merge pull request #306 from chr1syy/fix-windows-probing

Windows enhancements and fixes

src/__tests__/main/agents/path-prober.test.ts

@@ -63,6 +63,21 @@ describe('path-prober', () => {
 			}
 		});
 
+		it('should include nvm4w and npm paths on Windows', () => {
+			const originalPlatform = process.platform;
+			Object.defineProperty(process, 'platform', { value: 'win32', configurable: true });
+
+			try {
+				const env = getExpandedEnv();
+				// Check for nvm4w paths (OpenCode commonly installed here)
+				expect(env.PATH).toContain('C:\\nvm4w\\nodejs');
+				// Check for npm global paths
+				expect(env.PATH).toMatch(/AppData[\\\/](npm|Roaming[\\\/]npm)/);
+			} finally {
+				Object.defineProperty(process, 'platform', { value: originalPlatform, configurable: true });
+			}
+		});
+
 		it('should preserve existing PATH entries', () => {
 			const originalPath = process.env.PATH;
 			const testPath = '/test/custom/path';

src/main/agents/path-prober.ts

@@ -84,6 +84,11 @@ export function getExpandedEnv(): NodeJS.ProcessEnv {
 			// Node.js
 			path.join(programFiles, 'nodejs'),
 			path.join(localAppData, 'Programs', 'node'),
+			// Node Version Manager for Windows (nvm4w) - OpenCode commonly installed here
+			'C:\\nvm4w\\nodejs',
+			path.join(home, 'nvm4w', 'nodejs'),
+			// Volta - Node version manager for Windows/macOS/Linux (installs shims to .volta/bin)
+			path.join(home, '.volta', 'bin'),
 			// Scoop package manager (OpenCode, other tools)
 			path.join(home, 'scoop', 'shims'),
 			path.join(home, 'scoop', 'apps', 'opencode', 'current'),
@@ -252,6 +257,9 @@ function getWindowsKnownPaths(binaryName: string): string[] {
 			// Scoop installation (recommended for OpenCode)
 			path.join(home, 'scoop', 'shims', 'opencode.exe'),
 			path.join(home, 'scoop', 'apps', 'opencode', 'current', 'opencode.exe'),
+			// Volta - Node version manager (OpenCode commonly installed via Volta)
+			path.join(home, '.volta', 'bin', 'opencode'),
+			path.join(home, '.volta', 'bin', 'opencode.cmd'),
 			// Chocolatey installation
 			path.join(
 				process.env.ChocolateyInstall || 'C:\\ProgramData\\chocolatey',
@@ -471,13 +479,16 @@ export async function checkBinaryExists(binaryName: string): Promise<BinaryDetec
 				.filter((p) => p);
 
 			if (process.platform === 'win32' && matches.length > 0) {
-				// On Windows, prefer .exe over .cmd over extensionless
-				// This helps with proper execution handling
+				// On Windows, prefer .exe > extensionless (shell scripts) > .cmd
+				// This helps avoid cmd.exe limitations and supports PowerShell/bash scripts
 				const exeMatch = matches.find((p) => p.toLowerCase().endsWith('.exe'));
 				const cmdMatch = matches.find((p) => p.toLowerCase().endsWith('.cmd'));
+				const extensionlessMatch = matches.find(
+					(p) => !p.toLowerCase().endsWith('.exe') && !p.toLowerCase().endsWith('.cmd')
+				);
 
-				// Return the best match: .exe > .cmd > first result
-				let bestMatch = exeMatch || cmdMatch || matches[0];
+				// Return the best match: .exe > extensionless shell scripts > .cmd > first result
+				let bestMatch = exeMatch || extensionlessMatch || cmdMatch || matches[0];
 
 				// If the first match doesn't have an extension, check if .cmd or .exe version exists
 				// This handles cases where 'where' returns a path without extension

src/main/group-chat/group-chat-router.ts

@@ -452,6 +452,7 @@ ${message}`;
 			});
 			const configResolution = applyAgentConfigOverrides(agent, baseArgs, {
 				agentConfigValues,
+				sessionCustomModel: chat.moderatorConfig?.customModel,
 				sessionCustomArgs: chat.moderatorConfig?.customArgs,
 				sessionCustomEnvVars: chat.moderatorConfig?.customEnvVars,
 			});
@@ -849,7 +850,9 @@ export async function routeModeratorResponse(
 
 				// Apply SSH wrapping if configured for this session
 				if (sshStore && matchingSession?.sshRemoteConfig) {
-					console.log(`[GroupChat:Debug] Applying SSH wrapping for participant ${participantName}...`);
+					console.log(
+						`[GroupChat:Debug] Applying SSH wrapping for participant ${participantName}...`
+					);
 					const sshWrapped = await wrapSpawnWithSsh(
 						{
 							command: spawnCommand,
@@ -1149,6 +1152,7 @@ Review the agent responses above. Either:
 	});
 	const configResolution = applyAgentConfigOverrides(agent, baseArgs, {
 		agentConfigValues,
+		sessionCustomModel: chat.moderatorConfig?.customModel,
 		sessionCustomArgs: chat.moderatorConfig?.customArgs,
 		sessionCustomEnvVars: chat.moderatorConfig?.customEnvVars,
 	});

src/main/ipc/handlers/process.ts

@@ -292,7 +292,8 @@ export function registerProcessHandlers(deps: ProcessHandlerDependencies): void
 					) as Record<string, string>;
 
 					// Determine an explicit shell to use when forcing shell execution on Windows.
-					// Prefer a user-configured custom shell path, otherwise fall back to COMSPEC/cmd.exe.
+					// Prefer a user-configured custom shell path, then PowerShell, then ComSpec/cmd.exe.
+					// PowerShell is preferred over cmd.exe for better script handling and to avoid cmd.exe limits.
 					const customShellPath = settingsStore.get('customShellPath', '') as string;
 					if (customShellPath && customShellPath.trim()) {
 						shellToUse = customShellPath.trim();
@@ -300,8 +301,20 @@ export function registerProcessHandlers(deps: ProcessHandlerDependencies): void
 							customShellPath: shellToUse,
 						});
 					} else if (!shellToUse) {
-						// Use COMSPEC if available, otherwise default to cmd.exe
-						shellToUse = process.env.ComSpec || 'cmd.exe';
+						// Try PowerShell if available (common on modern Windows)
+						// If not, fall back to ComSpec/cmd.exe
+						// PowerShell handles shell scripts better and avoids cmd.exe command line length limits
+						const powerShellPath = process.env.PSHOME
+							? `${process.env.PSHOME}\\powershell.exe`
+							: 'powershell';
+						shellToUse = powerShellPath;
+						logger.debug(
+							'Using PowerShell for agent execution on Windows (shell script support)',
+							LOG_CONTEXT,
+							{
+								shellPath: shellToUse,
+							}
+						);
 					}
 
 					logger.info(`Forcing shell execution for agent on Windows for PATH access`, LOG_CONTEXT, {

src/main/process-manager/spawners/ChildProcessSpawner.ts

@@ -3,6 +3,7 @@
 import { spawn } from 'child_process';
 import { EventEmitter } from 'events';
 import * as path from 'path';
+import * as fs from 'fs';
 import { logger } from '../../utils/logger';
 import { getOutputParser } from '../../parsers';
 import { getAgentCapabilities } from '../../agents';
@@ -188,6 +189,24 @@ export class ChildProcessSpawner {
 				);
 			}
 
+			// Auto-enable shell for Windows when command is a shell script (extensionless with shebang)
+			// This handles tools like OpenCode installed via npm with shell scripts
+			if (isWindows && !useShell && !commandExt && commandHasPath) {
+				try {
+					const fileContent = fs.readFileSync(spawnCommand, 'utf8');
+					if (fileContent.startsWith('#!')) {
+						useShell = true;
+						logger.info(
+							'[ProcessManager] Auto-enabling shell for Windows to execute shell script',
+							'ProcessManager',
+							{ command: spawnCommand, shebang: fileContent.split('\n')[0] }
+						);
+					}
+				} catch {
+					// If we can't read the file, just continue without special handling
+				}
+			}
+
 			if (isWindows && useShell) {
 				logger.debug(
 					'[ProcessManager] Forcing shell=true for agent spawn on Windows (runInShell or auto)',

src/renderer/App.tsx

@@ -8433,6 +8433,7 @@ You are taking over this conversation. Based on the context above, provide a bri
 				customPath?: string;
 				customArgs?: string;
 				customEnvVars?: Record<string, string>;
+				customModel?: string;
 			}
 		) => {
 			const chat = await window.maestro.groupChat.create(name, moderatorAgentId, moderatorConfig);

src/renderer/components/EditGroupChatModal.tsx

@@ -347,23 +347,22 @@ export function EditGroupChatModal({
 					) : (
 						<div className="flex items-center gap-2">
 							{/* Dropdown */}
-							<div className="relative flex-1">
+							<div className="relative flex-1" style={{ zIndex: 10000 }}>
 								<select
 									value={selectedAgent || ''}
 									onChange={(e) => handleAgentChange(e.target.value)}
-									className="w-full px-3 py-2 pr-10 rounded-lg border outline-none appearance-none cursor-pointer text-sm"
+									className="w-full px-3 py-2 pr-10 rounded-lg border outline-none appearance-none cursor-pointer text-sm relative"
 									style={{
 										backgroundColor: theme.colors.bgMain,
 										borderColor: theme.colors.border,
 										color: theme.colors.textMain,
+										zIndex: 10000,
 									}}
 									aria-label="Select moderator agent"
 								>
 									{availableTiles.map((tile) => {
 										const isBeta =
-											tile.id === 'codex' ||
-											tile.id === 'opencode' ||
-											tile.id === 'factory-droid';
+											tile.id === 'codex' || tile.id === 'opencode' || tile.id === 'factory-droid';
 										return (
 											<option key={tile.id} value={tile.id}>
 												{tile.name}
@@ -374,7 +373,7 @@ export function EditGroupChatModal({
 								</select>
 								<ChevronDown
 									className="absolute right-3 top-1/2 -translate-y-1/2 w-4 h-4 pointer-events-none"
-									style={{ color: theme.colors.textDim }}
+									style={{ color: theme.colors.textDim, zIndex: 10001 }}
 								/>
 							</div>
 

src/renderer/components/NewGroupChatModal.tsx

@@ -163,15 +163,18 @@ export function NewGroupChatModal({
 
 	// Build moderator config from state
 	const buildModeratorConfig = useCallback((): ModeratorConfig | undefined => {
-		const hasConfig = customPath || customArgs || Object.keys(customEnvVars).length > 0;
+		const customModelValue = agentConfig.model;
+		const hasConfig =
+			customPath || customArgs || Object.keys(customEnvVars).length > 0 || customModelValue;
 		if (!hasConfig) return undefined;
 
 		return {
 			customPath: customPath || undefined,
 			customArgs: customArgs || undefined,
 			customEnvVars: Object.keys(customEnvVars).length > 0 ? customEnvVars : undefined,
+			customModel: customModelValue || undefined,
 		};
-	}, [customPath, customArgs, customEnvVars]);
+	}, [customPath, customArgs, customEnvVars, agentConfig]);
 
 	const handleCreate = useCallback(() => {
 		if (name.trim() && selectedAgent) {
@@ -337,23 +340,22 @@ export function NewGroupChatModal({
 					) : (
 						<div className="flex items-center gap-2">
 							{/* Dropdown */}
-							<div className="relative flex-1">
+							<div className="relative flex-1" style={{ zIndex: 10000 }}>
 								<select
 									value={selectedAgent || ''}
 									onChange={(e) => handleAgentChange(e.target.value)}
-									className="w-full px-3 py-2 pr-10 rounded-lg border outline-none appearance-none cursor-pointer text-sm"
+									className="w-full px-3 py-2 pr-10 rounded-lg border outline-none appearance-none cursor-pointer text-sm relative"
 									style={{
 										backgroundColor: theme.colors.bgMain,
 										borderColor: theme.colors.border,
 										color: theme.colors.textMain,
+										zIndex: 10000,
 									}}
 									aria-label="Select moderator agent"
 								>
 									{availableTiles.map((tile) => {
 										const isBeta =
-											tile.id === 'codex' ||
-											tile.id === 'opencode' ||
-											tile.id === 'factory-droid';
+											tile.id === 'codex' || tile.id === 'opencode' || tile.id === 'factory-droid';
 										return (
 											<option key={tile.id} value={tile.id}>
 												{tile.name}
@@ -364,7 +366,7 @@ export function NewGroupChatModal({
 								</select>
 								<ChevronDown
 									className="absolute right-3 top-1/2 -translate-y-1/2 w-4 h-4 pointer-events-none"
-									style={{ color: theme.colors.textDim }}
+									style={{ color: theme.colors.textDim, zIndex: 10001 }}
 								/>
 							</div>
 

src/shared/group-chat-types.ts

@@ -73,6 +73,8 @@ export interface ModeratorConfig {
 	customArgs?: string;
 	/** Custom environment variables */
 	customEnvVars?: Record<string, string>;
+	/** Custom model selection (e.g., 'ollama/qwen3:8b') */
+	customModel?: string;
 	/** SSH remote config for remote execution */
 	sshRemoteConfig?: {
 		enabled: boolean;