Skill comparison
Compare agent skills before installing.
Comparing 4 skills
Use this as a shortlist, then open the skill detail page before adopting.
Decision summary
Mailspring is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.
Strongest overall
Mailspring
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Mailspring
Best first install candidate based on install readiness and adoption.
Freshest repo
Mfcmapi
Most recent maintenance signal among this shortlist.
| Signal | Mfcmapi MFCMAPI | 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. | Cloud Mail A Cloudflare-based email service | 基于 Cloudflare 的邮箱服务 | Cloudflare Email 邮箱 Mail | Mailspring :love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux. |
|---|---|---|---|---|
| Quality | 84/100 Strong | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 95/100 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 | 970 stars 0 installs | 15K stars 0 installs | 11K stars 0 installs | 18K stars 0 installs |
| Freshness | Jun 19, 2026 | May 24, 2026 | Jun 9, 2026 | Jun 15, 2026 |
| Use-case fit | ||||
| Workflow fit | ||||
| Platform hints | C++, Email, Claude Code | Python, Email, Claude Code | JavaScript, Email, Claude Code | JavaScript, 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 microsoft/mfcmapi | $ npx skills add mail-in-a-box/mailinabox | $ npx skills add maillab/cloud-mail | $ npx skills add Foundry376/Mailspring |