{"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-6w64wbzt","versions":[{"created_at":"2026-06-20T06:26:05Z","element_count":83,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"b9fb93098a4217d40b60f6dd3ad2f32ea08f753e2ec3a64029991fc803bdcdca","version":3},{"created_at":"2026-06-20T06:16:04Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"cc3d594d78579bf01b4c1cf58332ee7628d28e296af679113a447f5d91908ec5","version":2},{"created_at":"2026-06-20T06:16:01Z","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}]}