New security response header “From-Origin” is out in Safari Technology Preview 56. Turn it on under Experimental Features.https://twitter.com/webkit/status/996797946787172359 …
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I’m willing to discuss but I’d appreciate if such docs were a little more open about who’s proposed what, done work etc.
Are you thinking about directly identifying the authors of the proposals discussed in the doc? Or people who reviewed the doc before we sent it out? Or adding more context? Tell me what you're missing and I'll add it, there's nothing there that we can't be completely open about.
WebKit has raised issues, proposed specs, and landed two open source implementations including ~50 test cases. If we’re going to collaborate, let’s give each other credit when we write docs. 
To be clear, I don’t think there’s any bad intent here. I try to stick to benefit of the doubt. But IMHO, it’s important to give credit to make something like this stay collaborative.
Totally, this is easy to rectify! I added the authors of the relevant specs/proposals (please let me know if I forgot someone from Apple, so far I have you and Ryosuke) and the people who contributed to the doc.
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