{"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-hethoug8","versions":[{"created_at":"2026-06-18T07:28:47Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"9ce3530871c77a59fbcdcf86b0f4a856dc26e700abd08c7df7f66420a5a227bb","version":3},{"created_at":"2026-06-18T07:21:39Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ea60e1c6c2336f8230db9c5c34f3f88893e2b556aab2ae15687430133384e118","version":2},{"created_at":"2026-06-18T07:21:37Z","element_count":101,"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}]}