Validating "scratch for AI Agents" Before Building

I'm running a 2-week validation experiment before building my next product.

Concept: Visual AI orchestration platform - Drag blocks (GPT-5.1, Claude Opus 4.5, Llama Maverick 4, etc.) - Connect them into workflows - Parallel execution (not sequential like Zapier) - Zero code required

Why: n8n is too complex for non-devs. Zapier doesn't do parallel execution. Gap exists.

The bet: IF 500 signups in 2 weeks → I build it (3 months). IF not → I pivot/kill it.

Current: 26/500 (Day 2)

Landing page: https://orchastra.org (mockups only - no product yet)

Questions for HN: 1. Is "Scratch for AI" clear or confusing? 2. Is 2 weeks enough validation? 3. What would make this actually useful vs just another automation tool?

Appreciate all brutal feedback.