feat(core): centralize compatibility checks and add TrueColor detection (#19478)

packages/core/src/utils/compatibility.ts

@@ -0,0 +1,78 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import os from 'node:os';
+
+/**
+ * Detects if the current OS is Windows 10.
+ * Windows 11 also reports as version 10.0, but with build numbers >= 22000.
+ */
+export function isWindows10(): boolean {
+  if (os.platform() !== 'win32') {
+    return false;
+  }
+  const release = os.release();
+  const parts = release.split('.');
+  if (parts.length >= 3 && parts[0] === '10' && parts[1] === '0') {
+    const build = parseInt(parts[2], 10);
+    return build < 22000;
+  }
+  return false;
+}
+
+/**
+ * Detects if the current terminal is a JetBrains-based IDE terminal.
+ */
+export function isJetBrainsTerminal(): boolean {
+  return process.env['TERMINAL_EMULATOR'] === 'JetBrains-JediTerm';
+}
+
+/**
+ * Detects if the current terminal supports true color (24-bit).
+ */
+export function supportsTrueColor(): boolean {
+  // Check COLORTERM environment variable
+  if (
+    process.env['COLORTERM'] === 'truecolor' ||
+    process.env['COLORTERM'] === '24bit'
+  ) {
+    return true;
+  }
+
+  // Check if stdout supports 24-bit color depth
+  if (process.stdout.getColorDepth && process.stdout.getColorDepth() >= 24) {
+    return true;
+  }
+
+  return false;
+}
+
+/**
+ * Returns a list of compatibility warnings based on the current environment.
+ */
+export function getCompatibilityWarnings(): string[] {
+  const warnings: string[] = [];
+
+  if (isWindows10()) {
+    warnings.push(
+      'Warning: Windows 10 detected. Some UI features like smooth scrolling may be degraded. Windows 11 is recommended for the best experience.',
+    );
+  }
+
+  if (isJetBrainsTerminal()) {
+    warnings.push(
+      'Warning: JetBrains terminal detected. You may experience rendering or scrolling issues. Using an external terminal (e.g., Windows Terminal, iTerm2) is recommended.',
+    );
+  }
+
+  if (!supportsTrueColor()) {
+    warnings.push(
+      'Warning: True color (24-bit) support not detected. Using a terminal with true color enabled will result in a better visual experience.',
+    );
+  }
+
+  return warnings;
+}