note: Queue routing checked. Workspace Companion real LLM Worker execution depends on embedded worker-runtime to worker crate connection `00001KW55B33B`, which is queued and blocked by execution backend boundary `00001KW55B32Y`. Leave queued until dependency chain is done.

author: yoi-orchestrator


note: Queue continuation requested by user. Dependency `00001KW55B33B` is closed and validated, so the Companion real LLM Worker Ticket is now unblocked. There are no other queued Tickets.

summary: 前段 `00001KW55B33B` が closed になったため、Workspace Backend 起動時の `workspace_companion` を実 LLM execution backend 付き Worker として spawn し、Worker list / Worker Console から通常 Worker として attach/send できる状態を完成させる。Companion 専用 fake/providerless response は復活させず、provider/config/secret 不足は typed diagnostic として扱う。

role_plan: Orchestrator が dedicated child worktree を作成し、coder Worker に `crates/workspace-server`, 必要に応じて `crates/worker`, `crates/worker-runtime`, `web/workspace`, root Cargo/package files の focused write scope を委譲する。reviewer Worker は read-only で Companion bootstrap、Worker input API 経路、protocol event / transcript / Web Console 表示、provider/config 不足時の typed diagnostic、fake response absence、Browser-facing non-leak を確認する。merge/validation/done/cleanup は Orchestrator が行う。現時点では `StopPod` は使用せず、cleanup は child worktree/branch のみ行う。