{"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-0onbdu9w","versions":[{"created_at":"2026-07-06T15:35:43Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e994e918f6ec816987a3283afeb1b04c02cc977b2eebb4fd66bf616bdd08d573","version":3},{"created_at":"2026-07-06T15:23:21Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4e365e207a8b963cc347e6510032b7045b187dba412c3bf2e273edf89a457524","version":2},{"created_at":"2026-07-06T15:23:21Z","element_count":130,"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}]}