{"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-sterlinghillbungalow-8zx6osaq","versions":[{"created_at":"2026-07-01T04:39:38Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"6e56e8ba4dd6505344c94fcb3428b3c302be5faa444ff19cc6da3a9bdd9f6454","version":3},{"created_at":"2026-07-01T04:34:42Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b004fc3b5462426acbbd04ab2b2499e584c77130acb9d2ad20a97810632ca6ea","version":2},{"created_at":"2026-07-01T04:34:42Z","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}]}