{"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-5wrgtwp9","versions":[{"created_at":"2026-06-13T21:01:22Z","element_count":85,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"003e5fe19702d3b291bf12dc89e307666a4c2499ba029671aaea1d5bf6d41ae5","version":3},{"created_at":"2026-06-13T20:46:27Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6110d4bd1f818f84f3dc807853572d86ef18c1e28f44972b46a8e5b7a2a17db6","version":2},{"created_at":"2026-06-13T20:46:25Z","element_count":119,"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}]}