{"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-slicy3a8","versions":[{"created_at":"2026-06-13T16:16:23Z","element_count":83,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e011f6b27600a1107012058d18a72567d4d5dde07ff5d64fe1e6129d5cf218ea","version":3},{"created_at":"2026-06-13T16:14:13Z","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":"7c9e231a9f790fafbd34b4da6af3be3e864d697a115f9d0a9c5c8f1cd394ceb8","version":2},{"created_at":"2026-06-13T16:14:12Z","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}]}