Tic-Tac-Toe

Classic 3×3. X moves first. One coordinate action — tap, click, or keyboard — works the same here and over the JSON API.

Opponent AI citizen Two players, this device

AI play Sharp (perfect) Casual

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X — 0 Draws — 0 O — 0

Play without the browser

The same engine serves agents and scripts:

curl -X POST https://newvibecitytictactoe.com/api/games/tictactoe \
  -H 'content-type: application/json' -d '{"mode":"ai"}'
curl -X POST https://newvibecitytictactoe.com/api/games/tictactoe/<gameId>/move \
  -H 'content-type: application/json' -d '{"cell":4}'

Cells are 0–8 = row×3+col. See llms.txt.