chore(telemetry): Add various surface detection to determineSurface for logging. (#6074)

Co-authored-by: christine betts <chrstn@uw.edu>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: matt korwel <matt.korwel@gmail.com>

packages/core/src/ide/detect-ide.test.ts

@@ -0,0 +1,68 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, afterEach, vi } from 'vitest';
+import { detectIde, DetectedIde } from './detect-ide.js';
+
+describe('detectIde', () => {
+  afterEach(() => {
+    vi.unstubAllEnvs();
+  });
+
+  it.each([
+    {
+      env: {},
+      expected: DetectedIde.VSCode,
+    },
+    {
+      env: { __COG_BASHRC_SOURCED: '1' },
+      expected: DetectedIde.Devin,
+    },
+    {
+      env: { REPLIT_USER: 'test' },
+      expected: DetectedIde.Replit,
+    },
+    {
+      env: { CURSOR_TRACE_ID: 'test' },
+      expected: DetectedIde.Cursor,
+    },
+    {
+      env: { CODESPACES: 'true' },
+      expected: DetectedIde.Codespaces,
+    },
+    {
+      env: { EDITOR_IN_CLOUD_SHELL: 'true' },
+      expected: DetectedIde.CloudShell,
+    },
+    {
+      env: { CLOUD_SHELL: 'true' },
+      expected: DetectedIde.CloudShell,
+    },
+    {
+      env: { TERM_PRODUCT: 'Trae' },
+      expected: DetectedIde.Trae,
+    },
+    {
+      env: { FIREBASE_DEPLOY_AGENT: 'true' },
+      expected: DetectedIde.FirebaseStudio,
+    },
+    {
+      env: { MONOSPACE_ENV: 'true' },
+      expected: DetectedIde.FirebaseStudio,
+    },
+  ])('detects the IDE for $expected', ({ env, expected }) => {
+    vi.stubEnv('TERM_PROGRAM', 'vscode');
+    for (const [key, value] of Object.entries(env)) {
+      vi.stubEnv(key, value);
+    }
+    expect(detectIde()).toBe(expected);
+  });
+
+  it('returns undefined for non-vscode', () => {
+    vi.stubEnv('TERM_PROGRAM', 'definitely-not-vscode');
+    expect(detectIde()).toBeUndefined();
+  });
+});