{"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-tyrellclosebungalow-bbta2hre","versions":[{"created_at":"2026-07-16T13:51:32Z","element_count":84,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ea6abeb92269b238eed5e69b615992a30144c93399d81264bb5f21f028661edd","version":3},{"created_at":"2026-07-16T13:47:39Z","element_count":82,"note":"loop3: 設計時延床 48.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f84001041a3617905935ca25b9f91ecce3b4157fc6a410735f5a9ebeca435ad0","version":2},{"created_at":"2026-07-16T13:47:38Z","element_count":82,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}