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

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

Strongest overall

PHPMailer

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

Fastest prototype

PHPMailer

Best first install candidate based on install readiness and adoption.

Freshest repo

Mjml

Most recent maintenance signal among this shortlist.

SignalBlastula

Easily send great-looking HTML email messages from R

Mjml

MJML: the only framework that makes responsive-email easy

Mailinabox

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.

PHPMailer

The classic email sending library for PHP

Quality
49/100
Needs review
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
51/100
Needs manual review

Do a manual repository review before adding this to an agent workflow.

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.

Adoption570 stars
Verified outcomes are shown on each skill page
18K stars
Verified outcomes are shown on each skill page
15K stars
Verified outcomes are shown on each skill page
22K stars
Verified outcomes are shown on each skill page
FreshnessApr 3, 2025Jun 12, 2026May 24, 2026Jun 6, 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 agentWeb data pipeline
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Platform hintsR, Email, Claude CodeJavaScript, Email, Claude CodePython, Email, Claude CodePHP, Email, Claude Code
WarningsRepository looks stale · No 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 require actively maintained dependencies · production agents without a repository 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 rstudio/blastula
$ npx skills add mjmlio/mjml
$ npx skills add mail-in-a-box/mailinabox
$ npx skills add PHPMailer/PHPMailer