{"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-t2durwf8","versions":[{"created_at":"2026-06-13T16:42:54Z","element_count":70,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"7a34b0ab77f20b9cd9e183bdb3169109a48ddefac8cc79e678657f3f347a7f29","version":3},{"created_at":"2026-06-13T16:30:30Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2c9dad2bffba1b0420ff1ac665565d3b505c4090f4a95a2f06bf8290f831c662","version":2},{"created_at":"2026-06-13T16:30:29Z","element_count":85,"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}]}