{"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-house-8zf1qqez","versions":[{"created_at":"2026-07-02T07:42:01Z","element_count":72,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"f9893be8c568d66510ccca4c72a152dffaa65a3187f26b321dc64b1963d127e3","version":3},{"created_at":"2026-07-02T07:29:21Z","element_count":86,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"01ffe6c7f38bf7aeb53574a5b2d33784891cb21c871bc1804d1a6b1be1b16c42","version":2},{"created_at":"2026-07-02T07:29:21Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}