{"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-ng82ug9j","versions":[{"created_at":"2026-06-20T06:26:01Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5b9e69549845bc2be5f7a8e0b317fc2793a0ef1247b3b42c6283faa02690f7ae","version":3},{"created_at":"2026-06-20T06:22:46Z","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":"55b69eaf5a129c3cec5ab13c74dba02862fb80c00d7a3b08bf6de258b55c1e22","version":2},{"created_at":"2026-06-20T06:22:42Z","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}]}