GitHub
cloudflare/security-audit-skill takes 1 on the GitHub board dated 2026-09-19T08:01:36.805273, climbing from 2, with 14493 stars on the live GitHub API pull. anthropics/claude-code jumps 6 to 2 (146445 stars). alibaba/open-code-review drops 1 to 3 (37008 stars). New versus September 18: affaan-m/ECC at 4, TencentCloud/Octop at 7, Fission-AI/OpenSpec at 8, and ankitects/anki at 9.
Top trending repos on GitHub: September 19
cloudflare/security-audit-skill: Coding-agent skill that runs a six-phase security audit with machine-readable findings. Korben.info covered the public MIT drop as the seed of Cloudflare's own audit pipeline. Climbs 2 to 1. 14493 stars.
anthropics/claude-code: Anthropic's terminal coding agent. Climbs 6 to 2, a 4-rank move. 146445 stars. It sat at 6 on September 18.
alibaba/open-code-review: Alibaba's hybrid deterministic-plus-LLM review CLI. Drops 1 to 3 after leading September 18. 37008 stars. The GitHub trending repos API still keeps it in the top 3.
affaan-m/ECC: Large agent-skill pack (262328 stars) with adapters for several coding agents. New at 4. The public README markets it as an agent performance system; star count is from the GitHub API, not a same-day launch post.
Tencent/BrowserSkill: Skill that lets agents drive a logged-in browser. Drops 4 to 5. 5507 stars.
addyosmani/agent-skills: Production engineering skills for coding agents. Drops 3 to 6. 96577 stars.
TencentCloud/Octop: Self-hosted multi-user AI assistant. New at 7. 4059 stars. No widely reported launch note identified for September 19 beyond the rank entry.
Fission-AI/OpenSpec: Spec-driven development toolkit for AI coding assistants. New at 8. 69481 stars.
ankitects/anki: Spaced-repetition flashcard program. New at 9. 31278 stars. AnkiMobile is also 4 on today's paid App Store board.
anthropics/knowledge-work-plugins: Anthropic plugins aimed at knowledge-work agents. Drops 8 to 10. 24953 stars.
The live ranked board beyond today's top 10 is available via the Trends MCP API. Get your free API key
What changed on GitHub since yesterday
- New: affaan-m/ECC (4), TencentCloud/Octop (7), Fission-AI/OpenSpec (8), ankitects/anki (9).
- Movers: security-audit-skill 2 to 1; claude-code 6 to 2; open-code-review 1 to 3; BrowserSkill 4 to 5; agent-skills 3 to 6; knowledge-work-plugins 8 to 10.
- Dropped: alphaXiv/OpenResearch (5), NationalSecurityAgency/ghidra (7), Tencent/WeKnora (9), abue-ammar/tinycast (10).
What today's GitHub repos reveal
Agent tooling still owns the board, but the leader changed. Cloudflare's audit skill is now 1, and Claude Code's 4-rank climb is the largest move among returning names.
Four of yesterday's names are gone, including Ghidra. The replacements are another skill pack (ECC), a self-hosted assistant (Octop), a spec workflow (OpenSpec), and Anki. That is a rotation inside the same agent-and-tools cluster, not a shift to a new language or framework.
Track these trends in real time with Trends MCP
This ranked list came from the Trends MCP get_top_trends tool. The same API is built for analysts, editors, and developers who need a dated board instead of a screenshot. Ranks 1-3 are repositories, so get_growth was skipped. Star counts are from api.github.com on September 19. The matching data source page is GitHub trending repos API.
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