The client hints and docs tested DoT with kdig (Knot's, often not installed) and DoH with curl's application/dns-json, which named's DoH doesn't speak (RFC 8484 wire format only). They use dig +tls / dig +https with +tls-ca and +tls-hostname now, with the port when it isn't the default.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>