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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.

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Decision summary

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

Strongest overall

Novu

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

Fastest prototype

Novu

Best first install candidate based on install readiness and adoption.

Freshest repo

Novu

Most recent maintenance signal among this shortlist.

SignalNotqmail

The collaborative Open Source successor to qmail and netqmail

PHPMailer

The classic email sending library for PHP

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.

Novu

The open-source communication infrastructure for agents and products

Quality
71/100
Strong
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
70/100
Prototype first

Prototype with this skill first; keep a fallback candidate ready.

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.

Adoption322 stars
0 installs
22K stars
0 installs
15K stars
0 installs
39K stars
0 installs
FreshnessApr 27, 2026Jun 6, 2026May 24, 2026Jun 16, 2026
Use-case fit
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Workflow automationCoding agentsRAG and knowledge
Stack fit
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Platform hintsC, Email, Claude CodePHP, Email, Claude CodePython, Email, Claude CodeTypeScript, Email, 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 · builders willing to evaluate younger projectsWorkflow 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 notqmail/notqmail
$ npx skills add PHPMailer/PHPMailer
$ npx skills add mail-in-a-box/mailinabox
$ npx skills add novuhq/novu