B.A.G.E.L. Language

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Example: Tic-tac-toe ​

Tic-tac-toe is the minimal B.A.G.E.L. game: one grid, one move (place marker), two end conditions (win by line or draw).

Entities ​

A single 3×3 grid:

json
{
  "name": "mainGrid",
  "type": "Grid",
  "width": 3,
  "height": 3
}

The engine adds the shared board and per-player markers.

Move ​

PlaceNew with entity thatMatches "isCurrentPlayer" and destination that is a Space and isEmpty, with playerChoice: true so the player picks the cell.

End conditions ​

  1. HasLine on mainGrid with sequence of 3 spaces that ContainsSame player → winner: ownerOfFirstResultEntity.
  2. IsFull on mainGrid → draw: true.

See the full JSON in the app’s “Three in a Row” example or in server/examples/tic-tac-toe.json / server/tic-tac-toe2.json.