Skill comparison
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
Strongest overall
Stirling PDF
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Stirling PDF
Best first install candidate based on install readiness and adoption.
Freshest repo
Stirling PDF
Most recent maintenance signal among this shortlist.
| Signal | Books Pdf books pdf | Stirling PDF #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere | Libvips A fast image processing library with low memory needs. | KkFileView Universal File Online Preview Project based on Spring-Boot |
|---|---|---|---|---|
| Quality | 69/100 Promising | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 72/100 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 | 2.2K stars Verified outcomes are shown on each skill page | 81K stars Verified outcomes are shown on each skill page | 11K stars Verified outcomes are shown on each skill page |
Skill comparison
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
Strongest overall
Stirling PDF
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Stirling PDF
Best first install candidate based on install readiness and adoption.
Freshest repo
Stirling PDF
Most recent maintenance signal among this shortlist.
| Signal | Books Pdf books pdf | Stirling PDF #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere | Libvips A fast image processing library with low memory needs. | KkFileView Universal File Online Preview Project based on Spring-Boot |
|---|---|---|---|---|
| Quality | 69/100 Promising | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 72/100 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 | 2.2K stars Verified outcomes are shown on each skill page | 81K stars Verified outcomes are shown on each skill page | 11K stars Verified outcomes are shown on each skill page |
| 14K stars Verified outcomes are shown on each skill page |
| Freshness | Feb 12, 2016 | Jun 18, 2026 | Jun 15, 2026 | Jun 11, 2026 |
| Use-case fit |
| Workflow fit |
| Platform hints | PDF, Claude Code | TypeScript, PDF, Claude Code | C, PDF, Claude Code | Java, PDF, Claude Code |
| Warnings | Repository looks stale | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet |
| Best for | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing 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 | 1 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies |
| Install | $ npx skills add huyubing/books-pdf | $ npx skills add Stirling-Tools/Stirling-PDF | $ npx skills add libvips/libvips | $ npx skills add kekingcn/kkFileView |
| 14K stars Verified outcomes are shown on each skill page |
| Freshness | Feb 12, 2016 | Jun 18, 2026 | Jun 15, 2026 | Jun 11, 2026 |
| Use-case fit |
| Workflow fit |
| Platform hints | PDF, Claude Code | TypeScript, PDF, Claude Code | C, PDF, Claude Code | Java, PDF, Claude Code |
| Warnings | Repository looks stale | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet |
| Best for | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing workflows · Claude Code teams · teams that value GitHub adoption signals | Document processing 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 | 1 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies |
| Install | $ npx skills add huyubing/books-pdf | $ npx skills add Stirling-Tools/Stirling-PDF | $ npx skills add libvips/libvips | $ npx skills add kekingcn/kkFileView |