{"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-2pybko8e","versions":[{"created_at":"2026-06-21T05:56:02Z","element_count":81,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"938f71a092726efdcfb8d01269ba39a64f87b327d6e461aec76d59db3f73334f","version":3},{"created_at":"2026-06-21T05:52:56Z","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":"b54211d16452653beaf790343a8fc51a131f13b5ae9053407b7c88d276d1e2fa","version":2},{"created_at":"2026-06-21T05:52:52Z","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}]}