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Adds an explicit, opt-in unreliable delivery path on Track, parallel to groups, gated behind a new wire version Lite05 / DRAFT_05 (ALPN moq-lite-05). Subscribers open a new DATAGRAMS bidi stream (0x6) for the tracks they want; QUIC datagram bodies carry `subscribe_id | sequence | payload`. Payload is capped at 1200 bytes and the publisher caches ~33 ms for late subscribers; each subscriber's `max_latency` filters stale entries on forward (`0` is strict, no congestion-delayed retries). Spec draft (datagrams section + Lite05 changelog) lives in moq-drafts. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The default Versions::all() advertises moq-lite-05 in the ALPN list, but the client/server match arms only handled up through moq-lite-04, so any peer that picked moq-lite-05 would error with UnknownAlpn. Mirror the 04 arm for 05 in both Rust (client.rs/server.rs) and TypeScript (connect.ts/accept.ts), and include ALPN_05 in the WebTransport protocols list. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Resolves merge conflicts in version.rs, lite/subscriber.rs, and model/track.rs. Renames the experimental wire version `Lite05` / `moq-lite-05` to `Lite04Datagrams` / `moq-lite-04-datagrams` per request — this variant will not be released as Draft05; it remains an experimental opt-in DATAGRAMS extension on top of Draft04. Wire code 0xff0dad05 is left unchanged for now since it only matters internally. Drops the cascading-abort-to-groups loop added on this branch (per the no-cascade rule for child handles); the parallel datagrams channel abort/finish cascade is kept since it is internal to the same TrackProducer, not a shared child entity. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Lite05/DRAFT_05(ALPNmoq-lite-05, code0xff0dad05) gating an opt-in unreliable delivery path.DATAGRAMSbidi control stream (0x6) parallel toSUBSCRIBE. Sharing the samesubscribe_idnamespace lets a single QUIC datagram body be routed by ID alone.subscribe_id (i) | sequence (i) | payload (b), payload capped at 1200 B. The sequence number is preserved on the wire (ignored by Lite05 semantics) so a future moq-transport adapter can reuse the same encoding.max_latencyfilters stale entries on forward.max_latency = 0is strict: only fresh arrivals (no congestion-delayed retries).TrackProducer.write_datagram/append_datagram,TrackConsumer.subscribe_datagrams→DatagramsConsumer. JS exposesTrack.writeDatagram/appendDatagram/recvDatagram/skipDatagramsToLatest.Files
lite/datagram.rs(wire) andmodel/datagram.rs(model) added;model/track.rs,lite/publisher.rs,lite/subscriber.rs, version +ControlTypeenums updated.lite/datagram.ts(wire) anddatagram.ts(model) added;track.ts,lite/connection.ts,lite/publisher.ts,lite/subscriber.ts, version +StreamIdupdated.Test plan
cd rs/moq-lite && cargo test(302 tests, 17 new)cd js/lite && bun test(252 tests, 12 new)just checkclean across all crates and JS workspacesmoq-lite-05peers exchange datagrams viamoq-relay; verify 33 ms cache evictionLite04↔Lite05peer never opens aDatagramsstream and never sends/receives datagram bodiesWebTransport.datagramsexercised in a watch demo against a Lite05 relayOut of scope
hang/publish/watchlayers to use datagrams🤖 Generated with Claude Code