Why I built Heym instead of extending n8n

I've been building AI workflows for a while. And for a while, n8n was the right tool for the job. Then the workflows started getting more complex. Not in terms of the number of steps, but in terms of what the steps needed to do. Agents that reason and call tools. Document retrieval wired directly into the execution flow. Approval checkpoints before anything consequential happens. Full observability into what the model actually did, why, and when. n8n wasn't designed for this. Neither was Zapier