{"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-woodberrydownhouse-f8mapjvh","versions":[{"created_at":"2026-06-28T07:30:03Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"0ebc1369c49c355c5990e3e452c0e4f0c15ec765669fae67e28f604e02473ecb","version":3},{"created_at":"2026-06-28T07:21:34Z","element_count":82,"note":"loop3: 設計時延床 58.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f99f13908051a898d14c38bd5cf5bd5bed2308375f4b462d1c1291e4dc1c7411","version":2},{"created_at":"2026-06-28T07:21:34Z","element_count":82,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}