{"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-willowbrookbungalow-77txaj0v","versions":[{"created_at":"2026-06-13T18:19:55Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cdc2abc8e292a0017674e41aaea69071f18118d7b9f9cbecbcedbd1cd82de582","version":3},{"created_at":"2026-06-13T18:11:56Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"94744a37623db1c8bbaec5a1a07f07eb307c678f6c3af3b6bc872a0f0b101637","version":2},{"created_at":"2026-06-13T18:11:56Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}