Stealth Browser
Python TypeScript Rust Next.js React Node.js Astro Prisma PostgreSQL Redis Stripe Electron Tauri Flutter Docker GitHub Actions FastAPI SQLite Firefox
01About
I don't build demos — I ship products that run. From a cloud browser platform to a desktop agent that books trips on real sites, every piece is designed for agents first and engineered to stay up.
I'm Youhai — a product engineer based in Beijing. Over the last two years I've worked across three AI startups and now build independently. Python, TypeScript, some Rust, and a lot of AI-assisted velocity.
- Focus Agent infrastructure & product
- Shipped 2 live products · 2 PyPI packages
- Open source 5 merged PRs · 100+ stars
- Writing Ghostwrote a published book on AI coding
02Selected work
Products I've designed and shipped end-to-end.
Stealth Browser Cloud browser · Agent platform
A Camoufox cloud browser with a hosted agent, REST API and JS/Python SDKs. Bring your own model, watch every run, take over at logins.
Travel Agent Open source · Desktop
An open-source travel agent that books on real websites beside the chat and stops at the payment page. macOS, Windows and Linux.
dy-cli & redbook-cli CLI · PyPI
Douyin and Xiaohongshu command-line tools designed for agents: JSON envelopes, short indexes, data on stdout and progress on stderr.
Kele Consumer · Live
A private mailbox for two people in a long-distance relationship — with a golden retriever that remembers everything about them.
03All projects
Everything I’ve built, in one list.
Independent products
Oct 2026 – now- Stealth Browser Camoufox cloud browser + hosted agent platform. REST API, JS/Python SDKs, bring your own model, take over at logins. TypeScript · Camoufox · better-auth · SQLite Site
- stealth-cli The browser component of Stealth Browser as a standalone CLI, local SDK, daemon and MCP server. Node ≥22 · Camoufox npm
- Kele · 可乐 Private mailbox for long-distance couples, with an AI golden retriever that remembers everything about them. Next.js · Vercel AI SDK · DeepSeek · Supabase Site
Open source
github.com/Youhai020616- dy-cli Douyin CLI for agents — search, download, publish, trending, live, analytics. JSON envelopes and short indexes. Python · Playwright GitHub
- redbook-cli Xiaohongshu CLI for agents — MCP + CDP dual engine, REST API, Docker. Python · FastAPI GitHub
- Agentmind Self-learning memory system for AI agents. TypeScript GitHub
- socialcli One CLI across Douyin, Xiaohongshu, X, Reddit, TikTok, LinkedIn and Bilibili. Python GitHub
- stealth-x Anti-detection X/Twitter CLI through a Camoufox browser with a real TLS fingerprint. JavaScript · Camoufox GitHub
- obsidian-ai-knowledge-organizer Review-first AI organizer for Obsidian — AI proposes, you approve, backup and rollback included. TypeScript GitHub
- betterchat-desktop Local-first open-source AI desktop client. Rust · Tauri 2 GitHub
- ai-video-pipeline Text → images → video → voice → subtitles → BGM → final cut, from Python. Python GitHub
- new-seo AI news aggregation, trend analysis and SEO content assistant. Next.js · DeepSeek GitHub
- vue-mcp MCP server for the Vue Bits library — search and fetch 40+ animated components. TypeScript GitHub
- pi-extensions Extensions for the Pi coding agent — Telegram remote control and more. TypeScript GitHub
- cli-marketplace Discover and explore CLI tools from GitHub, pixel-style UI. TypeScript GitHub
- bilibili_cli Bilibili command-line tool. Python GitHub
Prism-Shadow (Qianying Guangliu)
LLM Development Engineer · Jan 2026 – Oct 2026 · Beijing- Panofy.ai Agent SaaS platform — first contributor (196 of 710 commits). Server Actions → Services → Prisma, BullMQ workers, Stripe subscriptions and credit pools, SSE streaming, training and sharing. Next.js 16 · Prisma · BullMQ · Stripe Site
- Panofy SDK Official Python and TypeScript SDKs — one `predict()` entry point, long-running polling. 63 of 67 commits. Python · TypeScript PyPI
- Travel Agent Open-source desktop travel agent — #1 contributor (249 of 464 commits): product site, three-platform release CI, Chrome extension pairing, brand. Electron · TypeScript GitHub
- Penguin Go Gemini / DeepSeek API relay — first contributor (91 of 159 commits): billing, Alipay/WeChat recharge, invitation rewards, concurrency limits, audit logs. TypeScript · Express 5 · SQLite Site
- Payment Center Alipay / WeChat aggregation service — HMAC-signed API, idempotent orders, verified callbacks, lease-based reliable notifications. 14 of 16 commits. Node · Express 5 · PostgreSQL · Redis Private
- Auth Center OAuth 2.0 unified authentication — phone, email, password and third-party sign-in. TypeScript Private
- penguin-harness Contributor — MiniMax M3 preset, task file summary, site navigation (3 merged PRs). TypeScript GitHub
Zongzi Technology
AI Full-stack Engineer · Nov 2025 – Dec 2025 · Beijing- Articlegen Gemini-powered content marketing platform — Firecrawl brand extraction, parallel image generation, four-factor GEO score. React 19 · Vite · Vercel Private
- Email marketing platform Self-hosted SMTP sender with connection pooling, four-stage warm-up, pixel and link tracking, A/B tests. Next.js 14 · Prisma · Supabase · Nodemailer Private
- Reddit SEO assistant Manifest V3 Chrome extension — finds high-value Reddit threads and drafts replies with streaming OpenAI. Chrome MV3 · OpenAI Private
Yunwang Tianchuan
AI Application Engineer · Mar 2025 – Sep 2025 · Chengdu- Marketing pipeline End-to-end automated marketing for the company app — Playwright plus fingerprint browsers, 100+ IP-isolated accounts, agent-scheduled publishing. Python · FastMCP · LangChain · Next.js Private
- 《零基础用AI学编程》 Ghostwrote the entire book — a beginner’s guide to AI-assisted coding with DeepSeek and Windsurf. China Machine Press, 2025; published under the company principal’s name. Book · 机械工业出版社 Book
Private & in progress
- miantuandao · 面团岛 iOS app previewing post-procedure results for medical aesthetics — AR face scan plus AI generation. Flutter · Dart Private
- Agentry “Hire AI employees, not AI tools” — desktop app to hire, skill up and manage local agents. Electron · React 19 Private
- easyaiops Read-only AI incident investigation for small teams on Railway — evidence first, then a structured report. Node 24 · TypeScript Private
- SiliCrew Enterprise AI operations assistant, macOS desktop. Rust · TypeScript Private
- rust_penguin A small native Rust coding harness with a Pi-inspired terminal UI. Rust Private
05Contact
Have a project or an idea in mind? Let’s talk.
Open to collaborations and hard problems around agents, browsers and automation. The fastest way to reach me is a direct message.