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
Cal Heatmap
Most recent maintenance signal among this shortlist.
| Signal | Openpaas Esn Open PaaS Enterprise Social Network | Cloud Mail A Cloudflare-based email service | 基于 Cloudflare 的邮箱服务 | Cloudflare Email 邮箱 Mail | Cal Heatmap Cal-Heatmap is a javascript charting library to create a time-series calendar heatmap | Mailspring :love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux. |
|---|---|---|---|---|
| Quality | 48/100 Needs review | 100/100 Excellent | 100/100 Excellent | 100/100 Excellent |
| Decision verdict | 38/100 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. |
| Adoption | 485 stars Verified outcomes are shown on each skill page | 11K stars Verified outcomes are shown on each skill page | 3.1K stars Verified outcomes are shown on each skill page | 18K stars Verified outcomes are shown on each skill page |
| Freshness | May 2, 2025 | Jun 9, 2026 | Jul 20, 2026 | Jun 15, 2026 |
| Use-case fit | ||||
| Workflow fit | ||||
| Platform hints | JavaScript, Calendar, Claude Code | JavaScript, Email, Claude Code | TypeScript, Calendar, Claude Code | JavaScript, Email, Claude Code |
| Warnings | Repository looks stale · 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 · builders willing to evaluate younger projects | 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 require actively maintained dependencies · production agents without a repository 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 linagora/openpaas-esn | $ npx skills add maillab/cloud-mail | $ npx skills add wa0x6e/cal-heatmap | $ npx skills add Foundry376/Mailspring |