{"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-he60jm4w","versions":[{"created_at":"2026-06-13T21:01:15Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"74b840278912faa5928707d72c237515847b8a7889e0d1cd6db84a608709a1e2","version":3},{"created_at":"2026-06-13T20:48:29Z","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":"a4be9c725907b1c7330433bcbbf0c9a695f9782ad037169c8e91be0c33d9c43e","version":2},{"created_at":"2026-06-13T20:48:28Z","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}]}