{"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-wtcgx3vt","versions":[{"created_at":"2026-07-05T17:59:20Z","element_count":71,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"4fce8903818f4ac735c9dc5f794215990a63037835415019756795828dbfafc4","version":3},{"created_at":"2026-07-05T17:52:41Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b713e5e725cd3e5eebe340d5e9d052daab3ec264369c2dcee523e22227aaced9","version":2},{"created_at":"2026-07-05T17:52:40Z","element_count":119,"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}]}