{"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-yoct2sbh","versions":[{"created_at":"2026-06-14T06:20:29Z","element_count":90,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"d1f0ff1d0fb5de2c280dabbcbe256bbde735d0cbfcf214008b0bfa675ae81bc5","version":3},{"created_at":"2026-06-14T06:07:16Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0eda9867ed19b5ae4791b129bb47ce6c9b001bc9b096d3a00b527f91f0beffbf","version":2},{"created_at":"2026-06-14T06:07:15Z","element_count":88,"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}]}