{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-lh62w32r","versions":[{"created_at":"2026-07-17T14:13:52Z","element_count":71,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"b8d5b586dfdb0e47875ecd64ed103a3e54f99945e58e4247b367eabc1108cba3","version":3},{"created_at":"2026-07-17T14:02:39Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"38da0f752da6e4ae08b24ac93c3a4bed6a15d58b84b0cfdbd65ff2e5c1f59a65","version":2},{"created_at":"2026-07-17T14:02:39Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}