Here's a curated list of pages that tracks WebAssembly standards.

WebAssembly Standard and W3 Working Group

WebAssembly is standardized by W3C, the same group that standardizes CSS, HTML, and HTTP.

• W3’s official Wasm site.
• Almost all of the working drafts of proposed standards are in the WebAssembly GitHub Org.
  • All proposals are in one repo.
  • Refer to the meetings repo for the events schedule.
• W3 GitHub repo.
• W3 Community Page.

WebAssembly System Interface (WASI)

• WASI .
• WASI repo.
• The working group charter.
• Most of the WASI proposed standards are in the WebAssembly GitHub.
• The WASI libc library is the C library for core WASI.

The Component Model

One very important WebAssembly specification is the Component Model.

• Proposal.
• Design and specification.
• A great intro blog post.
• Canonical ABI.

WebAssembly Gateway Interface (Wagi)

DeisLabs (at Microsoft) proposed Wagi based on the CGI 1.1 specification.

• The architecture document is in the Wagi server repo.
• Environment variables description.
• Spin’s Wagi support.

Spin Improvement Proposals (SIPs)

The source repository.