{"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-v26d4os0","versions":[{"created_at":"2026-06-15T19:23:18Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e303c2c8c57ef3878604d62110fb344308b0b93fb39a8479b3525e2e3f4912d8","version":3},{"created_at":"2026-06-15T19:21:10Z","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":"f187693c65f538ea49d8f7e491233448c6a1ce5a4c0e621c4cad743e944eb2e0","version":2},{"created_at":"2026-06-15T19:21:09Z","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}]}