{"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-xii5puj3","versions":[{"created_at":"2026-06-13T16:56:17Z","element_count":89,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"c134592be426c8a94324f8545aae95cc7e74b9cd953ede981b94055674767ddc","version":3},{"created_at":"2026-06-13T16:52:14Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"65eac020d3039d0e2c72668fd7eb8a9dc9f66b4806d08bb510f4a8c09166dce4","version":2},{"created_at":"2026-06-13T16:52:14Z","element_count":119,"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}]}