{"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-renforthgrangehouse-tbrr69ew","versions":[{"created_at":"2026-07-03T14:28:13Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"441d0e65b777933737d444c9ad5d6fe28c8ff7a6cb8641eb20faaa0045ff6321","version":3},{"created_at":"2026-07-03T14:18:32Z","element_count":119,"note":"loop3: 設計時延床 58.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b0f28659f783c503d3cfb6d0a996b8ab05c3c79e9f29d5501d101afcfe104e68","version":2},{"created_at":"2026-07-03T14:18:32Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}