Skill comparison
Compare agent skills before installing.
Comparing 4 skills
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
Koreader is the strongest overall pick here because it has a 100/100 readiness score and fits Document processing.
Strongest overall
Koreader
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Koreader
Best first install candidate based on install readiness and adoption.
Freshest repo
Koreader
Most recent maintenance signal among this shortlist.
| Signal | Obsidian Annotator A plugin for reading and annotating PDFs and EPUBs in obsidian. | Koreader An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices | Readest Readest is a modern, feature-rich ebook reader designed for avid readers offering seamless cross-platform access, powerful tools, and an intuitive interface to elevate your reading experience. | Xournalpp Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input from devices such as Wacom Tablets. |
|---|---|---|---|---|
| Quality | 73/100 Strong | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 75/100 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 | 1.8K stars Verified outcomes are shown on each skill page | 27K stars Verified outcomes are shown on each skill page | 22K stars Verified outcomes are shown on each skill page | 15K stars Verified outcomes are shown on each skill page |
| Freshness | Jan 8, 2024 | Jun 24, 2026 | Jun 22, 2026 | Jun 15, 2026 |
| Use-case fit | ||||
| Workflow fit | ||||
| Platform hints | JavaScript, PDF, Claude Code | Lua, PDF, Claude Code | TypeScript, PDF, Claude Code | C++, PDF, 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 | 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 | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies | 0 views 0 install copies |
| Install | $ npx skills add elias-sundqvist/obsidian-annotator | $ npx skills add koreader/koreader | $ npx skills add readest/readest | $ npx skills add xournalpp/xournalpp |