[mike_d]

Early Hints breaks a lot of the common APIs (like FastCGI/FPM) where you are expected to have one request and one response. I don't know how Caddy specifically works, but I suspect that may be the reason for the fork.

[mholt]

Early Hints support was added to Caddy's proxy by Kevin Dunglas, the author of FrankenPHP. No fork required for Early Hints!