{"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-s5vyx4hf","versions":[{"created_at":"2026-07-13T10:37:33Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"05fc0968409d622f91ea0067ed5b8c80f0c0462c833adcb5e8b88d76ece100c5","version":3},{"created_at":"2026-07-13T10:28:57Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"44e9ee7e49acb79f4ba2855c0724e023056b6bc2a1a9236b4f06e4b68f003d0d","version":2},{"created_at":"2026-07-13T10:28:56Z","element_count":105,"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}]}