Greycat C

Quality score: 70/100 · Category: Security · Sub-category: security-misc

GreyCat C API and GCL Standard Library reference. Use for: (1) Native C development with gc_machine_t context, tensors, objects, memory management, HTTP, crypto, I/O; (2) GCL Standard Library modules - std::core (Date/Time/Tuple/geospatial types), std::runtime (Scheduler/Task/Logger/User/Security/System/OpenAPI/MCP), std::io (CSV/JSON/XML/HTTP/Email/FileWalker), std::util (Queue/Stack/SlidingWindow/Gaussian/Histogram/Quantizers/Random/Plot). Keywords: GreyCat, GCL, native functions, tensors, task automation, scheduler.

What this skill does

Greycat C is a production-ready Claude Code skill (quality score 70/100) in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/greycat-c/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Greycat C skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/greycat-c
curl -L https://claudskills.com/skills/greycat-c/SKILL.md \
  -o ~/.claude/skills/greycat-c/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/greycat-c/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/greycat-c/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\greycat-c\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

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