{"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-theoldmillhouse-61ivpzrv","versions":[{"created_at":"2026-06-13T18:06:35Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"ff5f258ff5e9d544c44dc403df45e95f339d9bbb5471f436415a928ff8285b2b","version":3},{"created_at":"2026-06-13T17:58:31Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ebb41d4746367f97c3dae7876e9e752ed8fe86ee1e3fd085aa0fbf8d1f6bc669","version":2},{"created_at":"2026-06-13T17:58:27Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}