fix(vscode): detect workspace before runtime registration

packages/ui/src/stores/utils/vscodeRuntime.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, test } from 'bun:test';
+import { isVSCodeRuntime } from './vscodeRuntime';
+
+describe('VS Code runtime detection', () => {
+  test('uses extension-host bootstrap config before runtime APIs are registered', () => {
+    expect(isVSCodeRuntime(null, {
+      workspaceFolder: '/workspace/project-one',
+      workspaceFolders: [{ name: 'project-one', path: '/workspace/project-one' }],
+    })).toBe(true);
+  });
+
+  test('does not classify an unregistered web runtime as VS Code', () => {
+    expect(isVSCodeRuntime(null, null)).toBe(false);
+  });
+});

packages/ui/src/stores/utils/vscodeRuntime.ts

@@ -0,0 +1,18 @@
+import type { RuntimeAPIs } from '@/lib/api/types';
+
+export interface VSCodeBootstrapConfig {
+  workspaceFolder?: unknown;
+  workspaceFolders?: unknown;
+}
+
+export const getVSCodeBootstrapConfig = (): VSCodeBootstrapConfig | null => {
+  if (typeof window === 'undefined') {
+    return null;
+  }
+  return (window as unknown as { __VSCODE_CONFIG__?: VSCodeBootstrapConfig }).__VSCODE_CONFIG__ ?? null;
+};
+
+export const isVSCodeRuntime = (
+  runtimeApis: RuntimeAPIs | null,
+  bootstrapConfig = getVSCodeBootstrapConfig(),
+): boolean => Boolean(bootstrapConfig || runtimeApis?.runtime?.isVSCode);