Star200+

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

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Decision summary

Thunderbird Android is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.

Strongest overall

Thunderbird Android

Use this as a leading candidate, then validate the README and install path in your own agent stack.

Fastest prototype

Thunderbird Android

Best first install candidate based on install readiness and adoption.

Freshest repo

React Calendar

Most recent maintenance signal among this shortlist.

SignalCalendar

A simple calendar with events, customizable widgets and no ads.

Thunderbird Android

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

React Calendar

Ultimate calendar for your React app.

Cal Heatmap

Cal-Heatmap is a javascript charting library to create a time-series calendar heatmap

Quality
98/100
Excellent
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
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.

100/100
Production-ready

Use this as a leading candidate, then validate the README and install path in your own agent stack.

Adoption2.0K stars
Verified outcomes are shown on each skill page
14K stars
Verified outcomes are shown on each skill page
3.8K stars
Verified outcomes are shown on each skill page
3.1K stars
Verified outcomes are shown on each skill page
FreshnessJun 15, 2026Jun 16, 2026Jul 27, 2026Jul 20, 2026
Use-case fit
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow fit
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Platform hintsKotlin, Calendar, Claude CodeKotlin, Email, Claude CodeTypeScript, Calendar, Claude CodeTypeScript, Calendar, Claude Code
WarningsNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yetNo OpenAgentSkill engagement data yet
Best forWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signalsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signalsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signalsWorkflow automation workflows · Claude Code teams · teams that value GitHub adoption signals
Not ideal forteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security reviewteams that need a vendor-supported SLA · high-compliance environments without internal security review
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Install
$ npx skills add FossifyOrg/Calendar
$ npx skills add thunderbird/thunderbird-android
$ npx skills add wojtekmaj/react-calendar
$ npx skills add wa0x6e/cal-heatmap