My backpack shows stacks of 250 swords, negative wood and unknown items

After a few updates, old saves load with items that should not exist, and a bug makes more. This entry gives your AI a checker for a backpack and a careful repair that moves what it can, drops what it must and tells you exactly what was lost.

Why this works

A backpack is a list of slots with rules: known item, whole positive count, no more than the stack size. A repair that checks these rules and reports every loss is safe to run on old saves.

When not to use it

Do not repair silently in a multiplayer game where the server is the owner of inventories; log the problem and let the server decide.

In the full entry

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

Say this to your AI

Use the Spielerando entry "My backpack shows stacks of 250 swords, negative wood and unknown items" (read_entry survival-backpack-has-impossible-stacks) 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