AI Agent Skills Directory in Action | AI Tech Frontier: Fast-Rising Open Source Projects in Claude (Sep 2026)

In Claude, these open-source projects are gaining stars fast. Sorted by star count, each entry below says what it does and who it's for. (emerging ai tech)

How to Fine-tune LLM on Custom Data

The list below answers that directly — every entry was picked around it and ordered by real platform data. Usually the first one is enough. (emerging ai tech)

1. affaan-m/ECC

Owner: affaan-m ｜ Stars: 259,521

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

2. NousResearch/hermes-agent

Owner: NousResearch ｜ Stars: 245,959

The agent that grows with you

3. Significant-Gravitas/AutoGPT

Owner: Significant-Gravitas ｜ Stars: 187,365

AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.

4. f/prompts.chat

Owner: f ｜ Stars: 170,394

f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.

5. langgenius/dify

Owner: langgenius ｜ Stars: 155,800

Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.

6. DietrichGebert/ponytail

Owner: DietrichGebert ｜ Stars: 141,906

Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

7. nextlevelbuilder/ui-ux-pro-max-skill

Owner: nextlevelbuilder ｜ Stars: 127,759

An AI skill that provides design intelligence for building professional UI/UX across multiple platforms.

8. Graphify-Labs/graphify

Owner: Graphify-Labs ｜ Stars: 118,125

Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local deterministic AST parsing, every edge explained, no vector store.

9. JuliusBrussee/caveman

Owner: JuliusBrussee ｜ Stars: 105,685

🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking like a caveman.

10. nexu-io/open-design

Owner: nexu-io ｜ Stars: 96,926

🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 export. 🤖 Claude Code / Codex / Cursor /

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Curated by StackPilot —— the ai agent skills directory. Browse all categories for the full directory.