{"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-didcotchurchstreetbu-o4uyfgyx","versions":[{"created_at":"2026-07-06T06:55:09Z","element_count":70,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"49d69e214f0f77e5103a5968dc3a8546aa4f8215a7435db3a986663ca38681f8","version":3},{"created_at":"2026-07-06T06:43:45Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d32ca64c5d47cf26c3ea7bfc1ac6953d28acb8b3bee312597f57221a445abe0e","version":2},{"created_at":"2026-07-06T06:43:45Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}