{"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-fusb7vmv","versions":[{"created_at":"2026-07-15T20:21:55Z","element_count":90,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"921339e8e896ae25d499fd7a3e3c8c41cf8148e02e19fecd22c4590a18e86ec9","version":3},{"created_at":"2026-07-15T20:13:16Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fbe87bf9402db8d14d1ddb55965a0d0b868c969c42b3fff194a478f86ca9613c","version":2},{"created_at":"2026-07-15T20:13:12Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}