Regarding the option 3 on deferred re-exports, I'm worried by this behavior of throwing for optional re-exports when they are accessed if the module was not evaluated by other path. There are a couple of things I'm worried here:

1. The first point is that it will throw a runtime error only when namespace is accessed, and this can be caused by changes from library side, which will make adoption quite unsafe. I can see production code breaking because of this.
2. Second is the behavior of not throwing if it was loaded by other path, because it will insert some complexity to understand why some imports throws and others don't. This will require some analysis from dependency graph and make it hard to debug.

The example I mentioned:

import { didRunPromiseQueue } from "./async-check.js";
import { x } from "./tla.js";
console.log(x, didRunPromiseQueue);

// async-check.js
let didRunPromiseQueue = false;
Promise.resolve().then(() => didRunPromiseQueue = true);

// tla.js
await null;
export const x = 1;

If tla.js was already evaluated, it will synchronously log x synchronously right after running async-check.js, without introducing an artificial await.

Thank you, everyone, for your summaries and conclusions so far. Right now, I am still looking for the following:

• bakkot just a very brief summary of the 262 update
• chipmorningstar I wrote a one-sentence summary, please review and edit if needed
• Chris de Almeida summary and/or conclusion for Withdrawing Intl.UnitFormat
• guybedford Import Sync for Stage 2 slides were not linked in the agenda, also need summary of presentation/conversation and to record any decisions or conclusions
• Ruben Error option limit & Error option framesAbove are both missing slides, summaries, and conclusions