{"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-gentlevalehouse-ob24kszw","versions":[{"created_at":"2026-06-13T18:34:25Z","element_count":90,"note":"5軸GA polish 49->98 by M5 (autonomous)","saved_by":"mcp","sha256":"30c85cd0298889d47819661f1bf960574e23ecffd58a963398135b37f7ddac77","version":3},{"created_at":"2026-06-13T18:20:07Z","element_count":94,"note":"loop3: 設計時延床 120.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fbda77f2dfcbc317f0714f8f25fdafe50d5ee3ad9e1f8f4be49850721a80952b","version":2},{"created_at":"2026-06-13T18:19:58Z","element_count":94,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}