{"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-sb882lee","versions":[{"created_at":"2026-07-06T06:21:26Z","element_count":90,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d72b18be314fc98d9b92ca03cff9f61eb4e57aebec8fe1dda942d90f574bf352","version":3},{"created_at":"2026-07-06T06:16:16Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"276f26cc0f74e4ac6862cb6b9a5edda440434ddd457306b5f49646036a1d7490","version":2},{"created_at":"2026-07-06T06:16:16Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}