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
Check If Email Exists is the strongest overall pick here because it has a 100/100 readiness score and fits Workflow automation.
Strongest overall
Check If Email Exists
Use this as a leading candidate, then validate the README and install path in your own agent stack.
Fastest prototype
Check If Email Exists
Best first install candidate based on install readiness and adoption.
Freshest repo
Lettre
Most recent maintenance signal among this shortlist.
| Signal | Rust Imap IMAP client library for Rust | Lettre a mailer library for Rust | Himalaya CLI to manage emails | Check If Email Exists Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend. |
|---|---|---|---|---|
| Quality | 85/100 Excellent | 100/100 Excellent | 100/100 Excellent | 96/100 Excellent |
| Decision verdict | 96/100 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 | 575 stars 0 installs | 2.2K stars 0 installs | 6.4K stars 0 installs | 8.8K stars 0 installs |
| Freshness | Jun 8, 2026 | Jun 12, 2026 | Jun 12, 2026 | Mar 17, 2026 |
| Use-case fit | ||||
| Stack fit | ||||
| Platform hints | Rust, Email, Claude Code | Rust, Email, Claude Code | Rust, Email, Claude Code | Rust, 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 jonhoo/rust-imap | $ npx skills add lettre/lettre | $ npx skills add pimalaya/himalaya | $ npx skills add reacherhq/check-if-email-exists |