## 作成 LocalTicketBackend によって作成されました。 --- ## Intake summary Marked ready by `yoi ticket state`. --- ## State changed Marked ready by `yoi ticket state`. --- ## State changed State changed to `planning`. --- ## Decision Returned to planning because the current ticket is not concrete enough. The purpose is specifically observation: Backend subscribes to a Runtime-owned WebSocket stream to receive Worker output and related runtime/worker events. It is not a command channel, not browser-facing, and not the path for sending user input. Before this can be ready, define the event model and protocol boundary concretely: - which Worker output events are streamed (text delta/final, reasoning visibility policy, tool call lifecycle, status, run started/completed/errored, usage, diagnostics); - whether the stream is runtime-wide, worker-scoped, or both; - event envelope shape, event id/cursor semantics, ordering, backlog, reconnect behavior, and unknown/expired cursor handling; - relationship between streamed output and transcript projection/event log persistence; - Backend client/proxy expectations and how Browser receives the projection without connecting directly to Runtime; - what is deliberately excluded from the stream, such as raw provider trace or raw full session log. --- ## Decision Runtime WebSocket event stream は、新しい Worker output protocol を作らず `crates/protocol` の `protocol::Event` を Backend-facing observation payload として流す方針にする。Runtime WS は `protocol::Event` の variant allowlist / subset を定義せず、worker-scoped envelope に event id / cursor / worker id を付けて Worker event bus の `protocol::Event` を forward する。 Browser / Web UI は Runtime WS に直接接続しない。Backend が Runtime WS client になり、Browser-facing stream は Backend-owned projection layer を通す。この projection layer を、後続の Web 権限制御で observation allow/deny、thinking/tool output/diagnostic redaction、operation-capable command API forwarding allow/deny を差し込む境界にする。STJT では full auth model は実装せず、この seam を型と責務として作る。 --- ## Intake summary Marked ready by `yoi ticket state`. --- ## State changed Marked ready by `yoi ticket state`. ---