Create an APP with AI

gistfile1.txt

Let’s say: “Build a full FastAPI backend + React frontend for a new SaaS.”

Design (ChatGPT Pro)

You: “Design architecture: entities, routes, DB schema, auth flow, deployment strategy.”

ChatGPT gives you:

Entity list

ER diagram description

API routes

Folder structure

Generate app (Claude 4.5 Opus)

Prompt Claude with:

The architecture spec from ChatGPT.

“Create backend in FastAPI + SQLAlchemy + Dockerfile + basic tests.”

Claude returns:

app/main.py

models.py, schemas.py, routers/…

docker-compose.yml, etc.

(If using Claude Code, it can directly apply file changes.)

Refine in the IDE (Windsurf + Copilot)

Open the repo in Windsurf.

Use agent to:

“Wire auth with JWT.”

“Add pagination to endpoints.”

“Refactor service layer for X.”

Copilot fills in small functions, boilerplate, tests.

Extra clarifications (Gemini / ChatGPT)

“Explain this bug / error.”

“Optimize this query.”

“Suggest better pattern for this module.”