Skill comparison
Compare agent skills before installing.
Put high-signal skills side by side and inspect quality, adoption, freshness, install readiness, use-case fit, and warnings in one place.
Comparing 4 skills
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
FreeCodeCamp is the strongest overall pick here because it has a 100/100 readiness score and fits Coding agents.
Strongest overall
FreeCodeCamp
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
FreeCodeCamp
Best first install candidate based on install readiness and adoption.
Freshest repo
FreeCodeCamp
Most recent maintenance signal among this shortlist.
| Signal | Hacker101 Source code for Hacker101.com - a free online web and mobile security class. | CTFd CTFs as you need them | FreeCodeCamp freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free. | Free Programming Books :books: Freely available programming books |
|---|---|---|---|---|
| Quality | 79/100 Strong | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 81/100 Strong shortlist Shortlist this skill and compare it with close alternatives before production adoption. | 100/100 Production-ready Use this as a leading candidate, then validate the README and install path in your own agent stack. | 100/100 Production-ready Use this as a leading candidate, then validate the README and install path in your own agent stack. | 100/100 Production-ready Use this as a leading candidate, then validate the README and install path in your own agent stack. |
| Adoption | 14K stars 0 installs | 6.7K stars 0 installs | 448K stars 0 installs | 390K stars 0 installs |
| Freshness | Feb 22, 2025 | Jun 16, 2026 | Jun 16, 2026 | Jun 13, 2026 |
| Use-case fit | ||||
| Stack fit | ||||
| Platform hints | SCSS, Education, Claude Code | Python, Education, Claude Code | TypeScript, Education, Claude Code | Python, Education, Claude Code |
| Warnings | Repository looks stale · No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet |
| Best for | Coding agents workflows · Claude Code teams · teams that value GitHub adoption signals | Coding agents workflows · Claude Code teams · teams that value GitHub adoption signals | Coding agents workflows · Claude Code teams · teams that value GitHub adoption signals | Coding agents workflows · Claude Code teams · teams that value GitHub adoption signals |
| Not ideal for | teams that require actively maintained dependencies · production agents without a repository review | teams that need a vendor-supported SLA · high-compliance environments without internal security review | teams that need a vendor-supported SLA · high-compliance environments without internal security review | teams that need a vendor-supported SLA · high-compliance environments without internal security review |
| OpenAgentSkill engagement | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies |
| Install | $ npx skills add Hacker0x01/hacker101 | $ npx skills add CTFd/CTFd | $ npx skills add freeCodeCamp/freeCodeCamp | $ npx skills add EbookFoundation/free-programming-books |