GitHub Trending 2026-09-07: Top 10 Most Popular & Fastest-Growing Apps

Auto-scraped daily from GitHub Trending (since=daily). Star counts as of 2026-09-07.

Today’s Highlights

• Leader：affaan-m/ECC gained +1,485 stars today, The agent harness performance optimization system. Skills, i
• Newcomer：mattpocock/skills entered the chart near the top (Skills for Real Engineers. Straight from my .agents director)

Top 5 at a Glance

1. affaan-m/ECC

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. ｜ JavaScript ｜ 251.3k stars (+1,485 today)

2. mattpocock/skills

Skills for Real Engineers. Straight from my .agents directory. ｜ Shell ｜ 254.5k stars (+2,207 today)

3. cathrynlavery/diagram-design

38 editorial diagram types for Claude Code, Codex, and Pi. Self-contained HTML + SVG. No shadows. No Mermaid slop. ｜ HTML ｜ 32.3k stars (+620 today)

4. NousResearch/hermes-agent

The agent that grows with you ｜ Python ｜ 242.5k stars (+520 today)

5. openai/skills

Skills Catalog for Codex ｜ Python ｜ 25.6k stars (+46 today)

Beyond the Chart

Full rankings and history live in the column database; deep-dive app profiles coming next.