Just shipped this after weeks of building and testing. It pulls leads from a Google Sheet, generates AI-personalized cold emails for each agent (name, city, company — all dynamic), and sends them automatically via Gmail. If no reply, it follows up on Day 4 with a different angle. Still no reply, it sends a final breakup email on Day 11 with a Calendly link. The thing that makes it special is human in the loop. It asks permission from me before sending follow-up emails. So I always know what is going on in the pipeline. Every reply gets cleaned, classified by AI (Interested / Ambiguous / Not Interested), and routed to separate Slack channels to notify me instantly. Everything logs back to Google Sheets automatically. Built entirely on n8n — no paid email tools, no Zapier, no shortcuts. Happy to answer questions about it. Also let me know if there is any suggestions about it.

I am genuinely amazed at how far Claude Skills can go when you train them properly. I built a LinkedIn Image Creator skill for a client. I already had images created for the client, so I just fed those to ChatGPT (our old friend) and asked it to create a brand guideline based on these images. Then I put those in the reference section and built the linkedin-image skill with Claude. The basis of this design creation was Canva connected to Claude via MCP. The biggest problem tha I encountered was, that even though I had the Client's signature image in the reference folder fo the project, it somehow was not picking it up from there, so I had to manually upload it to a folder in Canva and redirect Claude to that. I was amazed how similar the design it created was to the ones I created manually, I mean sure there was a lot of back and forth between me and claude but finally it did what I was asking it to do. At the end of the session, I simply asked Claude: • what it learned from the project • what errors kept happening • what patterns caused failures • how those failures could be prevented next time Then I told it to update the skills.md file with those learnings. Curious to know what others faced when creating a skill with the skill builder.