FAQ appears to be slightly empirically off but thanks for publishing this repo

I assert emails from January 2015 can verify against the current modern gmail DKIM keys. I believe the key rotation was patchy/rolling and took a long time. I also have emails from April 2015 which don't, but do validate against the key in this repository as of commitid 44e0c365604f17d9ac0d6cfad9136d33b1565e4a.
The original DKIM key length Google was using was at least as small as 512-bits, and it was cracked very quickly.
Theoretically, Google themselves could have forged the email "yesterday" with their old keys.
Who knows if this was actually from Hunter's laptop.
The best way for random other people to validate the key is, per Mr. Maxwell's suggestion, to look at their own old emails and triangulate/validate with the key against them, especially if they have old copies of their emails that have been stored out of Google or otherwise under their sole control since 2015ish.
There's no real way to prove context or accuracy of content. Thank you for implying that in your FAQ.

Thank you very much for publishing this repository, Robert. It's a fun diversion. :) Plus, you gave me reason to find and locate some emails I thought I'd lost. (Original pointer to this repository due to Mr. Maxwell, for which I am very grateful.)

robertdavidgraham / hunter-dkim

FAQ appears to be slightly empirically off but thanks for publishing this repo #6