{"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-el5ijjr1","versions":[{"created_at":"2026-06-13T19:45:20Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ea4b93aeb5dacb4880b5f1c7d58679e149cc2702ea149966d3333430623c2117","version":3},{"created_at":"2026-06-13T19:24:17Z","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":"5f635574102d069fbcaa25bb15a67b3b9d2b0ed9057bb8ea618cc27d3908d6fb","version":2},{"created_at":"2026-06-13T19:24:16Z","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}]}