- Added require() for synchronous ESM graphs, enabled WebSocket client by default, new CLI `node run <script>` and built‑in glob/globSync APIs;
- Updated V8 to 12.4.254.14 with Maglev support and C++20 Windows builds, causing breaking changes across the platform;
- Deprecated numerous runtime APIs (crypto HMAC/Hash constructors, createCipher/createDecipher, fs.Stats, util.log, util.isUndefined, etc.)