Same PRD, four stacks, zero LLM calls — and EU AI Act Annex IV from the same spec (opens in new tab)

Last month I published . This follow-up narrows to the four stable web stacks and adds the compliance angle teams are asking about before August 2, 2026. The problem with prompt-driven codegen Re-prompt the same PRD in Cursor or Copilot and you get different schemas, auth bugs, and divergent APIs. For demos that's fine. For production and regulatory documentation, it's a liability. Spec-to-application treats the PRD as a formal model and compiles it — same input, same output, no LLM in the ge...