{"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-willowbrookhouse-ekt01km8","versions":[{"created_at":"2026-06-13T18:20:41Z","element_count":70,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"090f5b9561fc5e7742db121e4b37d2125694ef9df6a7faeb0b34e961869c6cf0","version":3},{"created_at":"2026-06-13T18:11:06Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b3f30a7e250e3e3903cae39c341173e5a8efcc775c25ff042c2a565eb37fc541","version":2},{"created_at":"2026-06-13T18:11:05Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}