trycourier/courier-skills — reverse-engineered prompt

Build me a reusable AI coding assistant skill for Courier that helps someone set up production ready notifications without having to piece everything together themselves. I want it to work well in tools like Cursor or Claude Code, with one clear starting guide that routes people to the right help based on what they are trying to send.

It should cover the main channels people actually use, like email, SMS, push, in app inbox, Slack, Teams, and WhatsApp, and include practical guidance for common flows like password resets, one time codes, order updates, billing alerts, onboarding, engagement, and reactivation. Please also include the important real world stuff, like user preferences, unsubscribe handling, deliverability, consent, retries, idempotency, throttling, batching, journeys, templates, and multi channel routing.

Keep it grounded in Courier as the unified API, with examples for common developer workflows, plus migration help from other notification systems. Make the docs easy for an agent to navigate and use step by step. Look up current Courier docs online if you need to.