I build practical developer tools, AI-agent workflows, and small products that turn ideas into working software.

My current focus is on agent infrastructure, systems tooling, and open-source experiments across TypeScript, Rust, Python, Elixir, and the web.

• hyper — Terminal-first agent harness for repeatable, inspectable coding workflows.
• AgentHub — CLI and desktop tooling for managing multiple AI coding agents.
• guomi — Dependency-free Elixir implementation of SM2, SM3, and SM4 cryptography.
• netor — Cross-platform network traffic monitor written in Rust.
• China Dialect Map — Interactive visualization of China's linguistic diversity.
• Salvage — Read-only NTFS and signature-based data recovery tool.

• Reliable, observable workflows for coding agents
• Cross-platform CLI and desktop developer tools
• Knowledge systems, maps, and lightweight web applications
• Programming languages, systems, and applied cryptography

• Website: zeromarker.github.io
• Email: mark.chen.im@gmail.com

_{Build small, learn fast, leave useful artifacts.}