{"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-willowcreekbungalow-cxf0v5yg","versions":[{"created_at":"2026-06-13T19:45:34Z","element_count":85,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"21fc519acae3264ab0194f3e41c883c102ea13586705d41ffbbd285481696892","version":3},{"created_at":"2026-06-13T19:19:28Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"84b97f78f669c166362ef59ee36e22c560acd387b7710b82396a6559a8c70782","version":2},{"created_at":"2026-06-13T19:19:23Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}