- Added built‑in proxy support (CLI env proxy, HTTP/HTTPS request and Agent) and a new `shouldUpgradeCallback` for server‑controlled HTTP upgrades.
- Introduced percentage‑based `max_old_space_size` configuration and various performance optimizations across the runtime.
- Extended documentation (proxy usage, .env files, migration guides, security escalation policy) and updated key dependencies (OpenSSL 3.5.x, Undici 6.22.0, npm 10.9.4).