{"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-hawthornhouse-5bw6ng97","versions":[{"created_at":"2026-07-29T01:22:28Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6ad8788ec51ed153b3e2c552c6103c0a7f1d703b1d41a6c845373270d96cabbd","version":2},{"created_at":"2026-07-29T01:22:28Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}