{"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-thewillowbrookhouse-hp6k9qmr","versions":[{"created_at":"2026-06-13T18:35:13Z","element_count":91,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"aad1007c3ed19ceb964b10101958de72aeebd60457b9b05155a8b90005765196","version":3},{"created_at":"2026-06-13T18:26:34Z","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":"2026-06-13T18:26:31Z","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}]}