• One-command install in Claude Code: /plugin marketplace add BackstrokeDev/agent-plugins, then /plugin install backstroke@backstroke-plugins. Also works in Claude Desktop.

• Comes with five bundled skills: subject-line-ab-optimizer (read a Klaviyo campaign, get per-cohort subject lines, approve, clone into variants), hero-winner-picker (score candidate hero images for your audience and hand the winner to your ESP), image-face-off (zero-setup ranking of a few images against the global panel), plus setup and update helpers.

• Coexists with your other MCPs and ESP connectors — Backstroke doesn't proxy them, it just adds predictions into the workflow you already run.

Why it matters: instead of your agent guessing which Backstroke tool to call in which order, these recipes bundle the judgment — score, pick, act — into one reliable job.

https://github.com/BackstrokeDev/agent-plugins