{"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-willowbrookhouse-cvbirrtx","versions":[{"created_at":"2026-07-13T11:37:21Z","element_count":85,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"48fcf1473ad385c9fee3c3cd9c198e2b7dba20f68a3c68518ef95bd36dbdff82","version":3},{"created_at":"2026-07-13T11:24:01Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"efa0461172efd86a9e3c03c1f119b023124c194ed820f9fcf2e15a0d51bdc242","version":2},{"created_at":"2026-07-13T11:24:01Z","element_count":85,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}