{"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-o4ye25vl","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":91,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"05ff82ee6a6108424621d7f5bfdf870b11fe6ff4860000d973d7b617d4794fa1","version":3},{"created_at":"2026-07-13T09:38:24Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"33d5cd045d8aaf9c2e9441997a4904a081d31c451be19125287d95e39c174be7","version":2},{"created_at":"2026-07-13T09:38:24Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}