Undo and redo while planning a city, with money that stays right

Planning a layout is easier when every placement can be taken back. Two things usually go wrong: money gets out of step with the buildings after a few undos, and a new action after an undo leaves a redo that makes no sense. Here is a history that stays consistent.

Why this works

Money and buildings must never be set by hand, only by doing or reversing a recorded action. Then they cannot drift apart, and going back is simply the same record read in reverse.

When not to use it

Not for a game where actions have consequences that cannot be reversed, such as a fight, a random draw or time passing, because a take-back would hide that. Use it for planning only, and make the player confirm the plan for real.

In the full entry

• What to build, step by step
• Starting values and the reason for each
• 3 common mistakes and the fix
• 45 lines of example code with 4 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "Undo and redo while planning a city, with money that stays right" (read_entry sandbox-undo-redo-with-money-and-commit) in my game. Build it step by step, and show me how you checked that it works.

Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP