{"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-sartbernardhouse-3waxz3ol","versions":[{"created_at":"2026-06-16T12:16:56Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"501b235f2df3fe7dd86560b27a5373b753827df00b81b1be08728d203a37f13f","version":3},{"created_at":"2026-06-16T12:09:02Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7b7b42ed448872e114a4b0280a56bd5ba9455ba5113187a2a0520955514c90d5","version":2},{"created_at":"2026-06-16T12:09:00Z","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}]}