Persona first line carries the mouth's room tail (wake-reads-room-tail) #44
2026-11-11
Room tail: consumer-cap, hostile-field and key-dedupe tests; real three-field v3 over RUDP; a fully deduped tail is not called quiet; deploy-order note
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Room tail comes from the mouth's chat_pending.v3 tail field; the in-process accumulator is deleted
ChatPending gains a defaulted Option tail (old two-field mouths still decode), Chat::pending returns it, and a process's first line renders it: speakable rooms only, 20 per room and 60 in all, byte bound counting framing, quoted untrusted data, dedupe by event id against waiting deliveries, a marker for dropped lines and for rooms with none, and an unavailable note when the mouth sends no tail. A failed first poll fails the start as Chat again. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Persona process opens with the tail of her rooms: lines the mouth delivered through the ack, bounded, framed as untrusted data, unavailable noted
Matrix is the record and the mouth its only reader: the tail is assembled from the deliveries and contexts the mouth already sends (no new endpoint, no stored copy). Newest 60 lines / 24 KiB, oldest dropped with a marker; public sessions read the rooms she may speak in, a DM session its own room alone; a first poll that fails degrades to a tail-unavailable note instead of failing the wake. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>