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.
Decision summary
Mailu is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.
Strongest overall
Mailu
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Mailu
Best first install candidate based on install readiness and adoption.
Freshest repo
MailKit
Most recent maintenance signal among this shortlist.
| Signal | Mailu Insular email distribution - mail server as Docker images | Maddy ✉️ Composable all-in-one mail server. | MailKit A cross-platform .NET library for IMAP, POP3, and SMTP. | Simple Java Mail Simple API, Complex Emails (Jakarta Mail smtp wrapper) |
|---|---|---|---|---|
| Quality | 100/100 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. |
| Adoption | 7.3K stars 0 installs | 6.0K stars 0 installs | 6.8K stars 0 installs | 1.3K stars 0 installs |
| Freshness | May 31, 2026 | May 26, 2026 | Jun 12, 2026 | Jun 5, 2026 |
| Use-case fit | ||||
| Stack fit | ||||
| Platform hints | Python, Email, Claude Code | Go, Email, Claude Code | C#, Email, Claude Code | Java, Email, Claude Code |
| Warnings | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet | No OpenAgentSkill engagement data yet |
| Best for | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals | Workflow automation workflows · Claude Code teams · teams that value GitHub adoption signals |
| Not ideal for | 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 | 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 Mailu/Mailu | $ npx skills add foxcpp/maddy | $ npx skills add jstedfast/MailKit | $ npx skills add bbottema/simple-java-mail |