{"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-pgz6ynv6","versions":[{"created_at":"2026-06-13T19:03:30Z","element_count":74,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"911def53b13232c2272429b29fb3ab9d00dec3d72d7c6921252ca9b4d6c0f064","version":3},{"created_at":"2026-06-13T18:54:15Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"28bbfa31c7cdc20d6179fc58e67d53ceb5db7f58a013a5508366e642d60c833c","version":2},{"created_at":"2026-06-13T18:54:12Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}