Filed from the alktunnels graduation spec work (ADRs 007/008):
U-1 extends ADR-047's op-name → ALPN derivation to flavor-form open
op ids (channels/tunnel/direct, channels/tunnel/forwarded) so the
marker survives discovery and hub relay wraps them as channels, not
plain forwarding stubs; U-2 (ADR-049 amendment 3 sketch) gives the
establisher a path to contribute additive reply fields (the bind-first
listen 'bound' address — BND.ADDR fidelity). Both additive; data
plane untouched. alktunnels implementation is sequenced after these
land.
glm-5.3-flash
3b36b4074f