Technical requirements
Deliverability Check
Use this skill to get: a pass or fix list for your domain and drafts.
Free and open source
Available on GitHub and being improved in public.
Use it, modify it, or contribute an improvement. Read the install guide.
It checks your sending domain setup (SPF, DKIM, DMARC), looks for spam triggers in your drafts and links, and gives you a short list of fixes.
Claude CodeCodexSimilar skills
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Outreach Sequence Writer
Personal email and LinkedIn drafts for every lead, written from real research.
Outreach Launcher
Load your approved drafts into Apollo, lemlist or Instantly. It never sends on its own.
Product Context
Teach your agent your business once. Every other skill reads it.
What you get
- Domain setup checked.
- Spam triggers flagged in your drafts.
- Fixes in plain words.
Good fit
- Anyone sending cold email for the first time.
- Campaigns with falling open rates.
Not for
- Warming up inboxes for you.
- Bypassing spam filters.
Skills marked Concept are early releases being improved in public. Demo videos use a fictional company and show what each skill produces; they are not customer results. Check the GitHub directory for requirements and current limitations.