"""FastAPI application — stub for Plan 04."""

from __future__ import annotations

from fastapi import FastAPI


def create_app() -> FastAPI:
    """Create the FastAPI application.

    Full implementation in Plan 04.
    """
    app = FastAPI(title="nix-builder-autoscaler", version="0.1.0")

    @app.get("/health/live")
    def health_live() -> dict[str, str]:
        return {"status": "ok"}

    return app