[knot-resolver-users] Implementing DDR SVCB record

Hi there, I'm trying to implement SVCB record "_dns.resolver.arpa" for DDR mechanism for our AS50242 recursive resolvers. When I look on Cloudflare or Google implementation, they answer with "ADDITIONAL SECTION" also. kdig _dns.resolver.arpa @8.8.8.8 type64 ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 61402 ;; Flags: qr aa rd ra; QUERY: 1; ANSWER: 2; AUTHORITY: 0; ADDITIONAL: 4 ;; QUESTION SECTION: ;; _dns.resolver.arpa. IN SVCB ;; ANSWER SECTION: _dns.resolver.arpa. 86400 IN SVCB 1 dns.google. alpn=dot _dns.resolver.arpa. 86400 IN SVCB 2 dns.google. alpn=h2,h3 key7="/dns-query{?dns}" ;; ADDITIONAL SECTION: dns.google. 86400 IN A 8.8.8.8 dns.google. 86400 IN A 8.8.4.4 dns.google. 86400 IN AAAA 2001:4860:4860::8888 dns.google. 86400 IN AAAA 2001:4860:4860::8844 In Knot Resolver documentation is an example how to answer for SVCB request but without addition section. policy.add( policy.domains( policy.ANSWER( { [kres.type.SVCB] = { rdata=kres.parse_rdata({ 'SVCB 1 resolver.example. alpn=dot ipv4hint=192.0.2.1 ipv6hint=2001:db8::1', 'SVCB 2 resolver.example. mandatory=key65380 alpn=h2 key65380=/dns-query{?dns}', }), ttl=5 } } ), { todname('_testing.domain') })) Can anyone help me, how to add additional section to answer? Do we need to use policy.custom_action(state, request)? Thanks! Blažej