{"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-house-jl49q5qu","versions":[{"created_at":"2026-06-19T06:02:47Z","element_count":91,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"3457ac3626482672a0decf6ef779bf2007593a9c0ce4d991f6af6f7d6312e696","version":3},{"created_at":"2026-06-19T05:52:21Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7cbb6d07d1dbf4e3319d537594735d5524303e2d03e38e38593eb2c29ee48ed3","version":2},{"created_at":"2026-06-19T05:52:20Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}