Open Source · Engineering Notes

Build tools.
Write it down.

SwiftAct is a one-person open-source lab: multi-agent development tools and long-form writing on software engineering. All code is public on GitHub; all essays are on the blog.

Hangzhou, CN/github.com/HelloWorldU/contact@swiftact.cn

Theme A · Build tools

Open-source projects

Public code — design and progress open to verification.

Dev Tool

Kimi Code Swarm

A desktop app for local multi-agent parallel development: run multiple AI agents at once — each claims tasks, writes code, runs tests, and opens PRs, with automated review and merge. One person, one machine, many parallel threads of work.

Desktop · Multi-Agent · PR Automation github.com/HelloWorldU/Kimi-Code-Swarm →
Audio Tool

AutoMute

While watching a livestream, mute one specific person in the mixed audio in real time while everyone else keeps playing. Built on a custom C++ real-time audio engine (WASAPI system capture + ONNX voiceprint recognition) with a low-latency, lock-free pipeline.

C++ · WASAPI · ONNX · Real-time github.com/HelloWorldU/AutoMute →

Project details →

About

About SwiftAct

A one-person open-source lab. All projects are in early, active iteration — from multi-agent parallel development to real-time audio engines. Code, design, and progress (pitfalls included) are public.

Also writing long-form essays on software engineering: methodology, retrospectives, and how to keep software stable in the age of AI coding.

Open Public, verifiable code
Iterating From demo to daily tool
Hangzhou China · based in

Learn more →

Contact

Talk code, or work together

For project issues, open a GitHub issue. For partnerships or custom work, email directly.

Build tools. Write it down.