.NET provider has, long unmaintained, documentation of wire protocol.
It's this document
https://github.com/cincuranet/FirebirdSql.Data.FirebirdClient/blob/master/Documentation/FirebirdWireProtocol.pdf . I don't think we have resources to keep it up-to-date, especially as
it's probably only useful to provider writers and we can (and have to)
read the Firebird's source code anyway. Do you want to keep it somewhere
on firebirdsql.org site as a reference, kind of? I'm considering
deleting it (though it will be in repository's history so it's not