{"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-71tt299k","versions":[{"created_at":"2026-06-13T17:24:33Z","element_count":84,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"721efb71802ac99d67d31dcde56c442b22928d88e4d785436210e649d2d30018","version":3},{"created_at":"2026-06-13T17:08:38Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c553c1fe461f8fa842e0e415aba20ee0b1efabdbc64a7cb568be5ddc6604e0d0","version":2},{"created_at":"2026-06-13T17:08:37Z","element_count":86,"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}]}