{"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-nnptsvke","versions":[{"created_at":"2026-06-13T17:24:37Z","element_count":89,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"a92f89b6fe1e771473aa08c2cebeef72bc710c46e402d0b8e0b542d11e9961ee","version":3},{"created_at":"2026-06-13T17:11:49Z","element_count":119,"note":"loop3: 設計時延床 60.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4048e9b47acda0d57a999195e896473d2927c59c5f87e353b54c57004699315a","version":2},{"created_at":"2026-06-13T17:11:45Z","element_count":119,"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}]}