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

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.

SignalPostsack

Visually cluster your emails by sender, domain, and more to identify waste

Espanso

A Privacy-first, Cross-platform Text Expander written in Rust

Mailspring

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

Novu

The open-source communication infrastructure for agents and products

Quality
54/100
Needs review
100/100
Excellent
100/100
Excellent
100/100
Excellent
Decision verdict
56/100
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.

Adoption569 stars
Verified outcomes are shown on each skill page
14K stars
Verified outcomes are shown on each skill page
18K stars
Verified outcomes are shown on each skill page
39K stars
Verified outcomes are shown on each skill page
FreshnessAug 4, 2024Jun 14, 2026Jun 15, 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
Workflow fit
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Content growth agentCoding review agent
Platform hintsRust, Email, Claude CodeRust, Productivity, Claude CodeJavaScript, Email, Claude CodeTypeScript, 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 terhechte/postsack
$ npx skills add espanso/espanso
$ npx skills add Foundry376/Mailspring
$ npx skills add novuhq/novu