{"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-riverbendbungalow-trifq0ua","versions":[{"created_at":"2026-06-13T19:03:16Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"579b76b40b60b95f03b6b84a2774f7b546517bd2b9809f7b4fcea06d421acb26","version":3},{"created_at":"2026-06-13T18:57:47Z","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":"2db05985636df53a4bebca6da0f47805f208bb3d93d730f916787fa20ba2df3b","version":2},{"created_at":"2026-06-13T18:57:46Z","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}]}