SocketErrorException is now a std::system_error: code() carries the errno
under std::generic_category(), or getaddrinfo's result under the new
ResolverCategory(), whose message() is gai_strerror's text; `phase` says
which step failed (resolve, open, connect, send, receive). It is still a
std::runtime_error with the message ClientTCP always threw, the code's
text after it, so existing handlers keep working.
Before, the exception carried a `kind` and an int, and a caller that had
to print the cause its own way still had to match the message prefix to
learn where the failure happened. The standard type ends both: the
category knows how to print the number, and the phase is a field. A
caller writes "[Errno {}] {}" from code().value() and code().message(),
or compares code() with std::errc::connection_refused.
Breaking: SocketErrorException's `kind` and `code` members are gone;
read code().category() and code().value().
AGENTS.template.md holds the notes for working on Crafter.Network itself.
crafter-build 4.0.0 writes AGENTS.md from it on every build and test run,
with the notes of each dependency that ships some merged in, so AGENTS.md
is build output and gitignored. AGENTS.consumer.md holds the notes for
agents working in a project that depends on this library; crafter-build
merges it into that project's AGENTS.md, as the Crafter.Build README's
"Dependency notes for agents" describes.
Both were written from the interfaces, implementations, tests and
project.cpp rather than from the README. Where a comment in the sources
disagrees with the code (the HTTP3 header, the -fno-exceptions remarks,
"on the msquic worker", OpenStream(true) "throws", the QUIC certificate's
location and validity), the notes follow the code and list the comment
as a gotcha.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
