{"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-hrw0w57s","versions":[{"created_at":"2026-07-07T06:14:39Z","element_count":73,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"887efcdb517e4ca9b933a77bfdf4c3feb30e33ad949271ab2d7d6c6f7f19759f","version":3},{"created_at":"2026-07-07T06:07:40Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"124ce4aff123369cf55738f679785b0eb3634fdc8d4c8d239a613eeb5fd2defe","version":2},{"created_at":"2026-07-07T06:07:40Z","element_count":90,"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}]}