10 Fastest-Growing GitHub Repos This Week (Fourth Week of April 2026)

Every week we scan GitHub for the fastest-growing repositories in AI and developer tooling. Here are the 10 repos that exploded in stars this week — from new AI coding tools to open-source frameworks worth bookmarking.

Week of Fourth Week of April 2026 | Ranked by stars gained in the last 7 days.

1. kyegomez/OpenMythos — ⭐ 9.1k

A theoretical reconstruction of the Claude Mythos architecture, built from first principles using the available research literature.

⭐ 9,133 stars 🔀 1,957 forks 💻 Python 📄 MIT
🏷️ ai, anthropic, attention, claude
→ View on GitHub

2. browser-use/browser-harness — ⭐ 5.3k

Self-healing browser harness that enables LLMs to complete any task.

⭐ 5,295 stars 🔀 473 forks 💻 Python 📄 MIT
🏷️ general
→ View on GitHub

3. alchaincyf/huashu-design — ⭐ 4.8k

Huashu Design · HTML-native design skill for Claude Code · Claude Code 里 HTML 原生的设计 skill · 高保真原型 / 幻灯片 / 动画 + 20 设计哲学 + 5 维评审 + MP4 导出 · Agent-agnostic

⭐ 4,776 stars 🔀 750 forks 💻 HTML 📄 NOASSERTION
🏷️ general
→ View on GitHub

4. tw93/Kami — ⭐ 2.7k

👩‍🚒 Good content deserves good paper.

⭐ 2,691 stars 🔀 131 forks 💻 HTML 📄 MIT
🏷️ general
→ View on GitHub

5. EvoLinkAI/awesome-gpt-image-2-prompts — ⭐ 2.2k

Curated GPT-Image-2 prompts fot the Openai API：image examples across portraits, posters, UI mockups, character sheets, and community experiments.

⭐ 2,195 stars 🔀 193 forks 💻 Python 📄 NOASSERTION
🏷️ api, awesome-list, chatgpt, generative-
→ View on GitHub

6. OpenCoworkAI/open-codesign — ⭐ 1.5k

Open-source Claude Design alternative. One-click import your Claude Code / Codex API key. Prompt → prototype / slides / PDF. Multi-model (Claude, GPT, Gemini, Kimi, GLM, Ollama). BYOK, local-first, MI

⭐ 1,454 stars 🔀 110 forks 💻 TypeScript 📄 MIT
🏷️ ai-design, anthropic, byok, claude
→ View on GitHub

7. VoltAgent/awesome-claude-design — ⭐ 1.3k

Awesome Claude Design: 68 ready-to-use design system inspirations in DESIGN.md format. Drop one in, scaffold a full UI in one shot.

⭐ 1,268 stars 🔀 134 forks 💻 Multiple languages 📄 MIT
🏷️ claude-code, claude-design, design-md, design-system
→ View on GitHub

8. the-hidden-fish/advisor-ledger — ⭐ 977

No description provided.

⭐ 977 stars 🔀 92 forks 💻 Python 📄 No license
🏷️ general
→ View on GitHub

9. golbin/hop — ⭐ 860

No description provided.

⭐ 860 stars 🔀 178 forks 💻 TypeScript 📄 MIT
🏷️ general
→ View on GitHub

10. 432539/gpt2api — ⭐ 848

基于 chatgpt.com 逆向的 OpenAI 兼容 SaaS 网关 · GPT-IMAGE-2 稳定 · 批量出图 · 多账号池 · 高并发调度 · 积分计费 · 技术交流QQ 群 382446

⭐ 848 stars 🔀 217 forks 💻 Go 📄 NOASSERTION
🏷️ chatgpt, gpt-image-2, openai
→ View on GitHub

Data pulled from the GitHub Search API. Star counts reflect totals at time of publication. We update this list every Monday. Browse all posts →

Some links in this article may be affiliate links. See our affiliate disclosure for details.