2048

The prompt

Build a 2048 game. A small grid of numbered tiles. I slide the whole board up, down, left, or right. Matching numbers that bump together merge into the next number, and a new tile appears after a move that actually changed something. A slide that would do nothing should not be allowed.

The round ends when I create a target tile, or when no moves are left. Reaching the target is the win. Getting close, with a large tile that is not quite there, should be worth partial credit, not the same as a loss on a board of twos. Show the grid, my tile score, and the environment's result. WASD, arrow keys, and on-screen buttons. Several starting boards. The same board, played the same way, should spawn the same new tiles.

# AI : shared Action contract — the page posts {"move": "..."}; keep this shape.
from pydantic import BaseModel


class Action(BaseModel):
    move: str