offset=-1means “from the very beginning.”- After each read or append, the server returns
Stream-Next-Offset, the position to use for the next request. - Offsets are opaque tokens. Clients should not construct them; always use the values returned by the server.
Core
Offsets
Understand how offsets let clients start reads, resume progress, and follow stream position safely.
An offset is a position within a stream. Clients use offsets to read from a specific point or resume where they left off.

