V2026.4.19-Beta.1

[子セッションが呼び出し元のアカウントを継承しないよう改善] - Agents/channels: route cross-agent subagent spawns through the target agent's bound channel account while preserving peer and workspace/role-scoped bindings, so child sessions no longer inherit the caller's account in shared rooms, workspaces, or multi-account setups.