fix: properly quote Windows .cmd/.bat paths in spawn() calls

apps/frontend/src/main/__tests__/env-utils.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it, beforeEach, afterEach } from 'vitest';
-import { shouldUseShell, getSpawnOptions } from '../env-utils';
+import { shouldUseShell, getSpawnOptions, getSpawnCommand } from '../env-utils';
 
 describe('shouldUseShell', () => {
   const originalPlatform = process.platform;
@@ -198,3 +198,78 @@ describe('getSpawnOptions', () => {
     });
   });
 });
+
+describe('getSpawnCommand', () => {
+  const originalPlatform = process.platform;
+
+  afterEach(() => {
+    // Restore original platform after each test
+    Object.defineProperty(process, 'platform', {
+      value: originalPlatform,
+      writable: true,
+      configurable: true,
+    });
+  });
+
+  describe('Windows platform', () => {
+    beforeEach(() => {
+      Object.defineProperty(process, 'platform', {
+        value: 'win32',
+        writable: true,
+        configurable: true,
+      });
+    });
+
+    it('should quote .cmd files with spaces', () => {
+      const cmd = getSpawnCommand('C:\\Users\\OXFAM MONS\\AppData\\Roaming\\npm\\claude.cmd');
+      expect(cmd).toBe('"C:\\Users\\OXFAM MONS\\AppData\\Roaming\\npm\\claude.cmd"');
+    });
+
+    it('should quote .cmd files without spaces too (idempotent)', () => {
+      const cmd = getSpawnCommand('C:\\Users\\admin\\AppData\\Roaming\\npm\\claude.cmd');
+      expect(cmd).toBe('"C:\\Users\\admin\\AppData\\Roaming\\npm\\claude.cmd"');
+    });
+
+    it('should quote .bat files with spaces', () => {
+      const cmd = getSpawnCommand('D:\\Program Files (x86)\\scripts\\setup.bat');
+      expect(cmd).toBe('"D:\\Program Files (x86)\\scripts\\setup.bat"');
+    });
+
+    it('should NOT quote .exe files', () => {
+      const cmd = getSpawnCommand('C:\\Program Files\\Git\\cmd\\git.exe');
+      expect(cmd).toBe('C:\\Program Files\\Git\\cmd\\git.exe');
+    });
+
+    it('should NOT quote extensionless files', () => {
+      const cmd = getSpawnCommand('D:\\Git\\bin\\bash');
+      expect(cmd).toBe('D:\\Git\\bin\\bash');
+    });
+
+    it('should handle uppercase .CMD and .BAT extensions', () => {
+      expect(getSpawnCommand('D:\\Tools\\CLAUDE.CMD')).toBe('"D:\\Tools\\CLAUDE.CMD"');
+      expect(getSpawnCommand('C:\\Scripts\\SETUP.BAT')).toBe('"C:\\Scripts\\SETUP.BAT"');
+    });
+  });
+
+  describe('Non-Windows platforms', () => {
+    it('should NOT quote commands on macOS', () => {
+      Object.defineProperty(process, 'platform', {
+        value: 'darwin',
+        writable: true,
+        configurable: true,
+      });
+      expect(getSpawnCommand('/usr/local/bin/claude')).toBe('/usr/local/bin/claude');
+      expect(getSpawnCommand('/opt/homebrew/bin/claude.cmd')).toBe('/opt/homebrew/bin/claude.cmd');
+    });
+
+    it('should NOT quote commands on Linux', () => {
+      Object.defineProperty(process, 'platform', {
+        value: 'linux',
+        writable: true,
+        configurable: true,
+      });
+      expect(getSpawnCommand('/usr/bin/claude')).toBe('/usr/bin/claude');
+      expect(getSpawnCommand('/home/user/.local/bin/claude.bat')).toBe('/home/user/.local/bin/claude.bat');
+    });
+  });
+});

apps/frontend/src/main/env-utils.ts

@@ -473,14 +473,17 @@ export function shouldUseShell(command: string): boolean {
  * Provides a consistent way to create spawn options that work across platforms.
  * Handles the shell requirement for Windows .cmd/.bat files automatically.
  *
+ * For .cmd/.bat files on Windows, returns options that tell the caller to use
+ * proper quoting for paths with spaces.
+ *
  * @param command - The command path to execute
  * @param baseOptions - Base spawn options to merge with (optional)
  * @returns Spawn options with correct shell setting
  *
  * @example
  * ```typescript
  * const opts = getSpawnOptions(claudeCmd, { cwd: '/project', env: {...} });
- * spawn(claudeCmd, ['--version'], opts);
+ * spawn(getSpawnCommand(claudeCmd), ['--version'], opts);
  * ```
  */
 export function getSpawnOptions(
@@ -505,3 +508,28 @@ export function getSpawnOptions(
     shell: shouldUseShell(command),
   };
 }
+
+/**
+ * Get the properly quoted command for use with spawn()
+ *
+ * For .cmd/.bat files on Windows with shell:true, the command path must be
+ * quoted to handle paths containing spaces correctly (e.g., C:\Users\OXFAM MONS\...).
+ *
+ * @param command - The command path to execute
+ * @returns The command (quoted if needed for .cmd/.bat files on Windows)
+ *
+ * @example
+ * ```typescript
+ * const cmd = getSpawnCommand(claudeCmd); // "C:\Users\OXFAM MONS\...\claude.cmd"
+ * const opts = getSpawnOptions(claudeCmd, { cwd: '/project', env: {...} });
+ * spawn(cmd, ['--version'], opts);
+ * ```
+ */
+export function getSpawnCommand(command: string): string {
+  // For .cmd/.bat files on Windows, quote the command to handle spaces
+  // The shell will parse the quoted path correctly
+  if (shouldUseShell(command)) {
+    return `"${command}"`;
+  }
+  return command;
+}

apps/frontend/src/main/ipc-handlers/env-handlers.ts

@@ -10,7 +10,7 @@ import { projectStore } from '../project-store';
 import { parseEnvFile } from './utils';
 import { getClaudeCliInvocation, getClaudeCliInvocationAsync } from '../claude-cli-utils';
 import { debugError } from '../../shared/utils/debug-logger';
-import { getSpawnOptions } from '../env-utils';
+import { getSpawnOptions, getSpawnCommand } from '../env-utils';
 
 // GitLab environment variable keys
 const GITLAB_ENV_KEYS = {
@@ -603,7 +603,7 @@ ${existingVars['GRAPHITI_DB_PATH'] ? `GRAPHITI_DB_PATH=${existingVars['GRAPHITI_
       try {
         // Check if Claude CLI is available and authenticated
         const result = await new Promise<ClaudeAuthResult>((resolve) => {
-          const proc = spawn(claudeCmd, ['--version'], getSpawnOptions(claudeCmd, {
+          const proc = spawn(getSpawnCommand(claudeCmd), ['--version'], getSpawnOptions(claudeCmd, {
             cwd: project.path,
             env: claudeEnv,
           }));
@@ -623,7 +623,7 @@ ${existingVars['GRAPHITI_DB_PATH'] ? `GRAPHITI_DB_PATH=${existingVars['GRAPHITI_
             if (code === 0) {
               // Claude CLI is available, check if authenticated
               // Run a simple command that requires auth
-              const authCheck = spawn(claudeCmd, ['api', '--help'], getSpawnOptions(claudeCmd, {
+              const authCheck = spawn(getSpawnCommand(claudeCmd), ['api', '--help'], getSpawnOptions(claudeCmd, {
                 cwd: project.path,
                 env: claudeEnv,
               }));
@@ -692,7 +692,7 @@ ${existingVars['GRAPHITI_DB_PATH'] ? `GRAPHITI_DB_PATH=${existingVars['GRAPHITI_
       try {
         // Run claude setup-token which will open browser for OAuth
         const result = await new Promise<ClaudeAuthResult>((resolve) => {
-          const proc = spawn(claudeCmd, ['setup-token'], getSpawnOptions(claudeCmd, {
+          const proc = spawn(getSpawnCommand(claudeCmd), ['setup-token'], getSpawnOptions(claudeCmd, {
             cwd: project.path,
             env: claudeEnv,
             stdio: 'inherit' // This allows the terminal to handle the interactive auth