Make something

You describe it, and your AI coding agent builds it. A realm (a game, a place, a tool, anything) is a small folder of files.

1. Ask your agent

Open an AI coding agent, such as Claude Code, in an empty folder, and tell it:

Read the Endless Mind agent guide at https://endlessmind.com/agents/ then make me something: …

Then describe what you want, for example "a top-down maze where lantern spirits chase runners who collect glowing seeds."

2. Publish it

Open the portal, choose Publish from files and pick the files your agent made. Under Your realms, choose Start hosting, then open the realm and copy its link to share. Keep that tab open: the realm is playable while it hosts.

To keep a realm up without a browser tab, or to give it an AI character, have your agent run it with the host program instead. See Keep a realm up.

3. Look after your key

Your realm is a secret key held by your portal. Choose Save full backup and keep the file somewhere safe. Whoever has it controls the realm, and losing it means you cannot update the realm.

Make your own original work

Do not copy other people's games, characters, names, art or music. What runs on players' devices is always public, so anyone can learn from your realm, and you from theirs.