{"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-cyiv6cdw","versions":[{"created_at":"2026-06-13T16:03:56Z","element_count":83,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b08f3d638743770ecaf20a1bec3d079d3e41966980f971cd3fe2969654877ae1","version":3},{"created_at":"2026-06-13T16:00:05Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f406a7321c150d10abf69ee47326a266911174287d5d830ccdbcd84ddb541839","version":2},{"created_at":"2026-06-13T16:00:03Z","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}]}