{"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-wharfviewbungalow-sa9mzog5","versions":[{"created_at":"2026-07-06T23:04:49Z","element_count":89,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"afb408ceaabe376d9815a6c29a696db74d2e2aca265dc88663d5b345e0a01cf8","version":3},{"created_at":"2026-07-06T22:59:08Z","element_count":86,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"182c3ba9e5ad41a6fb97f7ac751f46f84538b97acfd6d1d873303f6e9a44beab","version":2},{"created_at":"2026-07-06T22:59:08Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}