{"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-z8a9oaf3","versions":[{"created_at":"2026-07-13T11:24:50Z","element_count":70,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"090f5b9561fc5e7742db121e4b37d2125694ef9df6a7faeb0b34e961869c6cf0","version":3},{"created_at":"2026-07-13T11:20:14Z","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":"fcfa3ed013ed412c41a50de33297bc4e608601aec573ea6994c5f9dfb14892b7","version":2},{"created_at":"2026-07-13T11:20:14Z","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}]}