From a crafting table to something nobody has made.

1. 1. Check the ingredients Two or three occupied slots, with one item used from each. Repeats work too. Ordinary recipes win. Names, lore and enchantments are ignored, and some things cannot be ingredients at all: books, maps, heads, spawn eggs, creative-only items and full containers.
2. 2. Pick the best of three ideas Three ideas are written at once, each from the ingredients alone. Nothing about the player goes in: no name, no chat, nothing from the world. A judge scores them, and an idea only goes on if it scores full marks for being right for kids.
3. 3. Check every word Before anything else sees it, every word passes a check that does not depend on an AI agreeing: no other company’s characters or brands, a list of words a children’s game does not print, and no lookalike letters to sneak a word past it.
4. 4. Decide what it does Not in code. What an invention can do comes from a fixed list of actions with no way to run a command, and every number is held inside its tier’s limits: how much it can hurt a mob, how many blocks it may change, whether it may explode at all.
5. 5. Give it a look An icon, and for vehicles, companions and things you place, a 3D shape. One that needs a shape and cannot get one fizzles.
6. 6. Fly it on a real server A real Minecraft Java server (Paper 1.21.4) starts up with the invention in it, and a test pilot, a real game client, uses it. The invention says what should happen: the pilot rises, moves, mines, lands a hit. The server checks it did. An error on the server fails the test. Nothing is signed without a passed run.
7. 7. Judge it again A second judge looks at the result and the test’s evidence. Is the trick real, or only sparkles? Would a nine-year-old use it twice? Is it safe? Every claim in its description is checked against what the test recorded.
8. 8. Sign it and deliver it The finished invention is signed, and your world checks the signature before it will make one. The first of its kind gets the next patent number; then it is in your hands.

If a step fails, the invention gets up to two repairs. If it still fails, or fails a safety check twice, it fizzles, and your ingredients come back. That combination fizzles for everyone after that.

Your world runs every invention inside limits of its own: how many blocks can change each second, how many creatures and particles there can be. An invention that slows the world down three times is rested in that world. Mining inventions dig a small, fixed shape and leave chests alone, and breaking blocks goes through the same protection as a player, so land claims still hold.

Inventions your world already knows keep working if the Patent Office is briefly out of reach. If we ever need to stop one, we can retire it everywhere at once; copies in inventories turn to plain paper.