Meteor 3.6-beta.X: Rspack 2.x, native TypeScript, Node.js 26, pnpm monorepos, instrumentation, PWAs, and a friendlier CLI

Update: This post has been updated for Meteor 3.6-beta.1 and now describes the complete Meteor 3.6 beta release, including the features and fixes added after beta.0. Meteor 3.5 brought MongoDB Change Streams, DDP session resumption, pluggable transports, and Node.js 24. The 3.5.x patches then hardened the runtime, Rspack builds, and reconnection behavior.