CultMeshQuicRealtimeProvider (packages/cultmesh-ts/src/realtime-quic.ts) is
the StreamPixels role: listen() opens a native listener, computes an
uppercase cert-sha256 advertisedEndpoint (the Unity connector requires the
pin), and accepts peers into a Set of the same CultMeshQuicRealtimeTransport
Cut 4 already built for consumers. broadcast() mirrors
CultMeshQuicRealtimeServer.BroadcastAsync: reliable-ordered awaits every
peer's send_complete via transport.sendFrame directly (Task.WhenAll,
evict-on-failure); latest-only publishes into a new per-peer
CultMeshQuicRealtimeProviderOutbox and returns without waiting on any peer's
I/O. The outbox pumps sendFrame's existing fresh-stream-per-frame path one
frame at a time, so a stalled peer holds at most one pending frame per
(channel, body) key.
Extracted CultMeshRealtimeLatestOnlyCoalescer from the inbound path's
inline Map+FIFO bookkeeping (unchanged behaviour) so the new outbox reuses
the same coalescing idiom instead of a second inline copy.
Accepting a connection buffers native events behind a synchronous listener
registration (the pump dispatches strictly sequentially, so registering
before any await is what makes the async runtime-reference acquisition that
follows safe) and replays them once the peer's CultMeshQuicRealtimeTransport
exists; a handshake timer evicts a peer that never completes CONNECTED.
Wired into the CultMesh facade as createQuicRealtimeProvider.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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