Module sequence 

Per-stream sequence state: serial-number arithmetic, duplicate windows, and wire-ID-to-handle mappings.

Sequence IDs are scoped to (conversation, sender). Each stream keeps a windowed bitmap of recently seen IDs (half-range window of 128) plus a bounded ring mapping recent wire IDs to stable application handles.

Structs

EditRing

Bounded ring mapping an edit’s own wire ID back to the ID it replaced.

InboundStream

Inbound stream state for one (conversation, sender) pair.

MessageHandle

Stable application identity of a transcript message.

OutboundStream

Outbound stream state for the local sender in one conversation.

PendingRepair

A pending automatic repair request for one missing frame.

RefRing

Bounded ring mapping recent wire IDs to message handles within one stream epoch. When an ID is reused or evicted, the old mapping retires.

SeenWindow

256-bit seen-ID bitmap with half-range window semantics.

StreamKey

Key of an inbound stream.

Enums

SerialClass

Classification of a received ID relative to a stream baseline.

Functions

classify

serial_delta

Serial-number delta from last to id, modulo 256.