fellow99
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$ whoami

fellow99

Full-stack builder shipping AI-native tools across desktop, web & mobile

I design, build and ship open-source products that put AI agents to work — three native desktop shells for agent harnesses, an in-process Node.js runtime for Android and HarmonyOS apps, a five-platform business framework, an OpenAI-compatible LLM gateway, a reusable skills library, a low-code enterprise platform and a 3D scene editor. Agents write the first draft; I own the architecture, review and release.

GitHub Browse projects
  • 9open-source projects
  • 7platform targets
  • 100%AI-native workflow

$ ls -1 projects/

Projects

Nine independent, open-source projects — eight with a live site, one on GitHub. Each one a doorway.

01

DSH Desktop

The open-source DeepSeek Harness agent in native desktop shells. The official dsh Web UI runs unchanged on Windows, Linux and macOS through an Electron shell with a local in-process host, system tray, native notifications and a built-in plugin marketplace — plus two HarmonyOS editions: Electron on HarmonyOS, and an ArkWeb shell on an in-process Node runtime.

  • Electron
  • DeepSeek Harness
  • HarmonyOS
Visit site
02

Pi Desktop

An Electron shell for the Pi agent harness — 100% upstream Pi and Pi Web, zero upstream changes. The Next.js server runs inside the app's main process, so your existing ~/.pi sessions, credentials and extensions carry over. Ships on Windows, macOS and Linux, plus two HarmonyOS editions built on Electron and on an in-process Node runtime.

  • Electron
  • Next.js
  • Pi harness
  • HarmonyOS
Visit site
03

OC Desktop

opencode in its desktop form. Windows, Linux and macOS run the official upstream release; HarmonyOS 2in1 / tablet is a third-party port shipped as two coexisting editions — HarmonyOS Edition (an in-process Node server rendered by ArkWeb, no Electron) and Electron on HarmonyOS Edition. The official Web UI loads same-origin from a local port, zero upstream changes.

  • Electron
  • opencode
  • HarmonyOS
Visit site
04

Node Bridge

Embed a real Node.js runtime inside your Android or HarmonyOS app's own process — not a WebView, cloud function or subprocess. A JNI/NAPI bootstrap dlopens libnode.so and calls node::Start, bridging JavaScript to Kotlin or ArkTS over bidirectional JSON. Four packages — a bridge and an engine runtime per platform, published on Maven Central and ohpm (Node v24.2, arm64-v8a).

  • Node.js
  • Android
  • HarmonyOS
  • JNI/NAPI
Visit site
05

TPL Framework

One skeleton, five platforms. A business application framework spanning the web, Android, HarmonyOS and WeChat mini program plus an admin console — one project layout, shared design tokens, three languages, light/dark themes and dual backends.

  • Vue 3
  • Spring Boot
  • Kotlin
  • ArkTS
Visit site
06

fellow99 Skills

Eleven reusable AI agent skills — HarmonyOS development and hdc on-device testing, WeChat mini-program automation and CI, spec-driven development flows, as-built spec generation, code-graph navigation, image generation and an ESP32 image-to-C converter. Drop-in for OpenCode and Claude Code.

  • OpenCode
  • Claude Code
  • Node.js
Visit site
07

LLM Router

An OpenAI-compatible gateway that aggregates many model providers behind a single endpoint: prefix-based routing, model aliases, weighted load balancing and automatic failover — with SSE streaming, client auth, JSON logs and a Docker image.

  • TypeScript
  • Express
  • Proxy
Visit site
08

Three Editor by AI

A browser 3D scene editor written by AI. Vue 3 and Three.js with transform gizmos and undo/redo, PBR materials, five light types, GLTF animation playback, GLTF / OBJ / FBX and 3D Tiles import, post-processing and a virtual file system.

  • Vue 3
  • Three.js
  • WebGL
Visit site
09

magic-ruoyi

An enterprise rapid-development platform that merges RuoYi-Vue-Plus with the magic-api dynamic interface engine: multi-tenant RBAC admin, an in-browser online API IDE, code generation, monitoring and OSS storage on Spring Boot 3 and Vue 3. Self-hosted — clone and run.

  • Spring Boot
  • Vue 3
  • magic-api
  • MyBatis-Plus
View on GitHub

$ man fellow99

About

I'm fellow99 — an independent full-stack developer who builds with AI, end to end. Most of my projects start as an idea plus an agent, then get shaped into shipped, cross-platform open-source tools: desktop shells for agent harnesses, a multi-platform framework, a model gateway, a low-code platform and creative editors.

I care about clean architecture, honest documentation and things that run offline when they can. Everything here is public and built in the open, under MIT or Apache-2.0.

Get in touch — fellow99@163.com

  • Ships across seven targets: Windows / Linux / macOS, HarmonyOS, Android, WeChat mini program and the web.
  • AI-native workflow — agents draft the code, I own architecture, review and release.
  • Open source first: nine public projects — mostly MIT, with one under Apache-2.0.