{"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-8owzpcfp","versions":[{"created_at":"2026-06-25T19:29:36Z","element_count":90,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"79866836d9401e9bfb43e343236dd34242f292bbeccf08e5a03089fdab9ab917","version":3},{"created_at":"2026-06-25T19:20:47Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"89da467bfe82141ed87631e35e5a49ac1b3b1cd7cec60b03eb053d41ecbd5185","version":2},{"created_at":"2026-06-25T19:20:46Z","element_count":126,"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}]}