17 tests pass (7 codec + 10 integration). The producer/consumer
shape, ADR-049 establishment integration, codec decision, and typed
establishment errors all validated over alkcall 0.5.0 channels.
Key findings folded into the ledger:
- OQ-TN-05 resolved for stream substrates: no backend trait —
pump_halves generic over boxed halves (TCP into_split, UDP
UdpHalf adapter); remaining thread is only the hub re-produce
composition question
- OQ-TN-06 convergence test satisfied: producer pump and consumer
pump are the same shape modulo channel side; extraction decidable
in Phase 1
- New finding for the alkcall ledger: OpenHandler JoinHandle
semantics are load-bearing and undocumented — a handler that
returns before the data plane starts tears the channel down at
birth (the POC found this by hanging; the pump must be awaited
inline). Plus: Establishment should carry the channel plan
(the reserved extension point) to kill the establisher handoff
side-channel
- UdpHalf truncation semantics flagged for the Phase 1 ADR
(recommend fail-loud over silent truncation)
POC crate: /workspace/alktunnels-udp-poc (db224cc).
glm-5.3-flash
6beabe9457