[ide-mode] Fix path delimiter for multi-root workspaces on Windows (#6273)

Co-authored-by: Jacob Richman <[email protected]>

2 files changed, 13 insertions, 3 deletions

diff --git a/packages/core/src/ide/ide-client.test.ts b/packages/core/src/ide/ide-client.test.ts
index 6955e495..f061156d 100644
--- a/packages/core/src/ide/ide-client.test.ts
+++ b/packages/core/src/ide/ide-client.test.ts
@@ -5,6 +5,7 @@
  */
 
 import { describe, it, expect } from 'vitest';
+import * as path from 'path';
 import { IdeClient } from './ide-client.js';
 
 describe('IdeClient.validateWorkspacePath', () => {
@@ -49,7 +50,7 @@ describe('IdeClient.validateWorkspacePath', () => {
 
   it('should handle multiple workspace paths and return valid', () => {
     const result = IdeClient.validateWorkspacePath(
-      '/some/other/path:/Users/person/gemini-cli',
+      ['/some/other/path', '/Users/person/gemini-cli'].join(path.delimiter),
       'VS Code',
       '/Users/person/gemini-cli/sub-dir',
     );
@@ -58,11 +59,20 @@ describe('IdeClient.validateWorkspacePath', () => {
 
   it('should return invalid if cwd is not in any of the multiple workspace paths', () => {
     const result = IdeClient.validateWorkspacePath(
-      '/some/other/path:/another/path',
+      ['/some/other/path', '/another/path'].join(path.delimiter),
       'VS Code',
       '/Users/person/gemini-cli/sub-dir',
     );
     expect(result.isValid).toBe(false);
     expect(result.error).toContain('Directory mismatch');
   });
+
+  it.skipIf(process.platform !== 'win32')('should handle windows paths', () => {
+    const result = IdeClient.validateWorkspacePath(
+      'c:/some/other/path;d:/Users/person/gemini-cli',
+      'VS Code',
+      'd:/Users/person/gemini-cli/sub-dir',
+    );
+    expect(result.isValid).toBe(true);
+  });
 });
diff --git a/packages/core/src/ide/ide-client.ts b/packages/core/src/ide/ide-client.ts
index 5ec0bb5c..f8ba6ef5 100644
--- a/packages/core/src/ide/ide-client.ts
+++ b/packages/core/src/ide/ide-client.ts
@@ -272,7 +272,7 @@ export class IdeClient {
       };
     }
 
-    const ideWorkspacePaths = ideWorkspacePath.split(':');
+    const ideWorkspacePaths = ideWorkspacePath.split(path.delimiter);
     const realCwd = getRealPath(cwd);
     const isWithinWorkspace = ideWorkspacePaths.some((workspacePath) => {
       const idePath = getRealPath(workspacePath);