Open source. Open possibilities.

Harper is an offline, privacy-first English grammar checker built in Rust. It lints documents in milliseconds with a tiny memory footprint, unlike cloud-based or resource-heavy alternatives.

Trace (also known as T次方) is an open-source Chrome extension for website behavior tracing and deep frontend debugging. Key features include Cookie tracking, event interception, object hooking via Proxy, script injection, request blocking, variable tracking, JS deobfuscation using AST, and response stream modification through Babel plugins.