Module draft13 

MoQT client implementation for draft-13.

Each draft lives in its own top-level module with a complete, independent implementation: connection, endpoint state machine, event types, observer trait, and per-flow state machines (subscribe, fetch, announce, track status). No code is shared across drafts — each draft carries its own copy because wire-level differences would make a shared layer leaky.

Enable via the draft13 feature.

Differences from draft-12

Draft-13 renames and restructures a few message types:

• SubscribeAnnounces / SubscribeAnnouncesOk / SubscribeAnnouncesError / UnsubscribeAnnounces are renamed to SubscribeNamespace / SubscribeNamespaceOk / SubscribeNamespaceError / UnsubscribeNamespace (same wire IDs 0x11-0x14).
• TrackStatusRequest (0x0D) becomes TrackStatus: a subscribe-like request carrying subscriber_priority, group_order, forward, and filter_type.
• TrackStatus (0x0E) becomes TrackStatusOk: a subscribe_ok-like response carrying track_alias, expires, group_order, content_exists, and an optional largest_location.
• New TrackStatusError (0x0F): request_id + error_code + reason_phrase.

The version varint is 0xff000000 + 13.

Modules

connection

Outbound MoQT connection with MoQT framing over QUIC.

endpoint

Unified endpoint state machine orchestrating all MoQT protocol flows.

event

Client event types emitted by a draft-12 MoQT connection.

fetch

Fetch lifecycle state machine.

namespace

Announce / SubscribeNamespace state machines.

observer

Connection observer trait for receiving structured events.

publish

Lifecycle of a subscription a peer opened with PUBLISH.

session

MoQT session lifecycle management (draft-12).

subscription

Subscription lifecycle state machine.

track_status

Track status lifecycle state machine.