Every n8n pack I’ve bought in the last two years had the same problem: it demoed clean and collapsed the second a client had two brands, a custom field, or a human who doesn’t follow the happy path.

The failure isn’t the tool. It’s that the template was built for a YouTube thumbnail, not a retainer.

What actually survives in an agency:

• Error handling that pages a human, not a Discord webhook nobody watches

• Naming and folders a VA can run without you on the call

• An audit step before anything writes to the client’s live account

• Docs that say what to do when the API 429s at 11pm

If you’re selling AI retainers and still handing clients a 14-node “lead magnet to CRM” that assumes one pipeline, you’re going to eat the hours you thought you automated.

We built Stems for that gap. Production systems. Not beginner tutorials.