How do I install the 21 Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/21/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

ClaudSkills / General / general-misc

21

Category: General · Sub-category: general-misc

2026년 4월, 상하이의 한 24세 엔지니어가 퇴근 후 네 시간을 써서 만든 GitHub 저장소 하나가 중국 테크 업계의 심장을 찔렀다. 그것이 겨눈 것은 코드가 아니라 동료의 **영혼**이었다. 회사가 직원에게 "너 자신의 대체품을 설계하라"고 요구하는 시대, 개발자들은 어떻게 반격하고 있는가 — 그리고 그 반격조차 증류될 운명인가?

What this skill does

21 is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/21/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The 21 skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It is part of the open ClaudSkills registry, a community-curated catalog of 56,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/21
curl -L https://claudskills.com/skills/21/SKILL.md \
  -o ~/.claude/skills/21/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/21/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/21/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\21\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.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

More General skills

Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all General skills → Top 100 skills

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

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