{"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-wandsworthmillhouse-sragib68","versions":[{"created_at":"2026-06-24T19:06:36Z","element_count":72,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"f75cee4c638540139e45fea79224e7db22f654f8999f47f587bec584bb5db1c2","version":3},{"created_at":"2026-06-24T18:56:19Z","element_count":83,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8b27bf6a61be0b83bb9ced334e28b8c6d6123640791b1f7905da8caef3de6f78","version":2},{"created_at":"2026-06-24T18:56:19Z","element_count":83,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}