AI Agent Skills Directory in Action | Dev Tools Articles: Fast-Rising Open Source Projects in AI Agent (Oct 2026)

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

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. deepseek-ai/deepseek-harness

Owner: deepseek-ai ｜ Stars: 225,820

DeepSeek Harness: Everything is a Plugin.

4. morluto/rea

Owner: morluto ｜ Stars: 203,487

Reverse engineer anything with agents, from app behavior down to native binaries.

5. firecrawl/firecrawl

Owner: firecrawl ｜ Stars: 181,009

The context API to search, scrape, and interact with the web at scale. 🔥

6. langchain-ai/langchain

Owner: langchain-ai ｜ Stars: 146,424

The agent engineering platform.

7. 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.

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. browser-use/browser-use

Owner: browser-use ｜ Stars: 114,759

Agents that use the browser.

10. google-gemini/gemini-cli

Owner: google-gemini ｜ Stars: 107,065

An open-source AI agent that brings the power of Gemini directly into your terminal.

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