Castronaut builds open systems, large-model tooling, and small corners of the web that feel alive.

_{Operating systems • developer tools • experiments • writing • dreamtales}

• Also known as Cao Yuhang.
• Building things around CapOS, developer workflows, and large-model testing.
• Interested in systems, web products, and the craft of turning ideas into usable tools.
• I like projects that are practical, a little strange, and made with care.

• Open systems and lightweight infrastructure.
• Tooling for model engineering, testing, and developer workflows.
• Web products, small experiments, and practical interfaces.
• Public writing, notes, and sharable learning resources.

• capos Open-source server operating system with a friendlier web desktop and app ecosystem.

• local-shell-mcp A remote-capable MCP shell workspace for persistent coding agents and developer workflows.

• lm-sv Tooling for stress-testing deep learning frameworks like MindSpore with generalized mutations.

• argosfs A self-driving, erasure-coded multidisk Linux filesystem with FUSE, repair tooling, and health autopilot.

• write4print A tool which can convert handwriting PDFs into a printable version.

• qorvexus An always-on Go agent platform with tools, memory, social channels, and a built-in control panel.

• Start here: fwerkor.com
• Read more: blog.fwerkor.com
• Watch: YouTube
• Ping me: Telegram / Email

As the last ship sailed towards the distant horizon,
I sat there watching on a rock,
my mind slowly drifting away,
forming into my dreamtale.