{"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-willowbrookhouse-2p6stoap","versions":[{"created_at":"2026-06-13T19:16:57Z","element_count":91,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9985ec09291cc32551922b2497dac40ab3f3c087dfc65e6cdb9ec5a01102e3f5","version":3},{"created_at":"2026-06-13T19:11:28Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"402ea5629a81001ec98f06d7a34a87fe760d62439abb235abbaeeaf65df9cf38","version":2},{"created_at":"2026-06-13T19:11:28Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}