preview2 questions

[yamt]

will preview2 require a component-model aware runtime? (to me it looks like "yes")

if yes, will there be no way to use wasi without component-model?

asking because, for some use cases of wasi, component-model looks very heavy-weight to me.
(both of implementation cost and runtime cost)

[sbc100]

My understanding is that the answer is no, since the component model types have canonical mappings to MVP wasm types, and so even though WASI modules conform to the requirements of the component model the are (or can be) simple MVP wasm module, and the output of wasi-sdk will still be normal/MVP wasm modules (at least for now).

[yamt]

do you mean, a runtime can still choose to implement the canonical mappings, which is a static plain core wasm abi, directly w/o knowing component-model/interface-types?

[sbc100]

Yes that is my understanding. @sunfishcode can confirm perhaps?

[sunfishcode]

Yes.

[sunfishcode]

And to be sure, my "yes" here was in response to sbc100's question. The component model defines a canonical ABI which is a core-wasm ABI. If there are any further questions, please file new issues!