Copilot writes code faster.
Archiet generates entire projects.

The spec-driven era: what comes after vibe coding

In February 2026, Andrej Karpathy declared the vibe coding era is ending. The next phase has a name: spec-driven development. Start with a specification — architecture, data model, compliance requirements — and generate from the spec rather than from natural language prompts. The output is deterministic, not approximated.

GitHub Copilot is the apex of AI pair programming. Suggest completions, iterate through prompts, ship features fast. For day-to-day development it remains excellent.

Archiet is spec-driven. Your specification is an Architectural Genome: entities, workflows, compliance flags, technology choices — encoded in a structured model. Generated code is derived from the spec. When the spec changes, regeneration is deterministic. When HIPAA or DORA requirements change, every affected file updates together.

The categories serve different stages. Vibe coding is fast-path exploration. Spec-driven is production-path engineering. If you are building something you will maintain, audit, and keep compliant for years, spec-driven wins on total cost of ownership.

Autocomplete vs architecture-to-code: different layers of AI

GitHub Copilot is an AI pair programmer that works inside your editor. It autocompletes code, suggests function implementations, and can generate boilerplate from comments. Every developer should use it — it makes coding 30-50% faster.

But Copilot does not design systems. It does not know about your entity relationships, compliance requirements, or deployment topology. It operates at the code level, not the architecture level. Asking Copilot to "create a full SaaS application with SOC 2 compliance" would require hundreds of prompts and manual coordination.

Archiet operates one level up. It takes an architecture model (entities, services, integrations, compliance frameworks) and generates the entire project — all 150-400 files — in one pass. The output is structurally consistent because it is derived from a single genome, not assembled from independent autocomplete suggestions.

Use both: Archiet generates, Copilot iterates

The ideal workflow for modern development teams:

1. Define your architecture in Archiet (5-10 minutes with the AI wizard) 2. Generate the complete codebase (backend, frontend, mobile, infra, tests) 3. Open the project in VS Code / JetBrains with GitHub Copilot enabled 4. Use Copilot to add custom business logic, write tests, refactor code 5. Use Archiet's drift detection to verify architecture alignment

Archiet creates the foundation. Copilot helps you build on top of it. They are not competing for the same job.