{"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-vertexedgebungalow-neadku18","versions":[{"created_at":"2026-06-30T20:25:38Z","element_count":82,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"ac99475087f2c9d84cd72dcadc57579b77453c442b9f19ad199e2dfae37e3c31","version":3},{"created_at":"2026-06-30T20:17:34Z","element_count":101,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e17e25abc913ffd4dd2a52207b4433fd2017b1d844e438ab2c4cc64ac9e6f91a","version":2},{"created_at":"2026-06-30T20:17:34Z","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}]}