Idea Forge

Newest update: The Refill (2026-10-12)

• When a big question round runs short, it now fills back up and shows you all the questions you earned.
• The design rater is now more encouraging—it grades your file fairly as a work-in-progress, not as a finished product.

Earlier update: Milestone Trophies (2026-10-11)

• Earn trophies as you forge — your first forge, 100 answers, 1000 answers, and more.
• Each trophy is a unique voxel sculpture that appears when you hit a milestone.
• Fill every field in an idea to forge the golden trophy.
• Share your ideas and get recognized for putting them out in the open.
• Answer prompts and watch your collection of achievements grow.

Earlier update: Hallucination Mode (2026-10-11)

• no idea savi hallucinating?

Earlier update: Empty Fields First (2026-10-11)

• The AI interviewer now spots which fields you've left blank and asks targeted questions to fill them in before moving on to deeper design work.
• You'll see a clear list of empty fields at the top of each question round, so you know exactly what the interviewer is focusing on.

Earlier update: Favi's Sharper Questions (2026-10-10)

• Favi now always gives you at least three answer choices to pick from, making it easier to steer your idea where you want it to go.

What players say

• @lego · 2026-10-04 · played 28 min · 1 heart · shown first by the maker: “This isn't really for me, but I decided to give it a try, and so far, it's really helpful! I'm planning to make a VN game myself, and this actually gives me some ideas. Might come back to this whenever I get a mental block haha”

  • @radiantquasar (maker) replied 2026-10-04: “What did you dislike about it?”
  • @lego replied 2026-10-04: “@radiantquasar nothing really. I just wanna come up with my own ideas first, but if nothing's working out, then I might ask Favi for help, you know”
  • @radiantquasar (maker) replied 2026-10-04: “@lego Well, you can't really do anything here without your own ideas, but ok!”

• @larrielabs · loved it · 2026-10-02 · played 18 min · 1 heart · shown first by the maker: “This is such a great way to build out a game idea!🥹✨I love that the questions help fill in the details & make me think more about how the game could actually work.This is especially helpful for new builders who r still figuring out their concepts!💡”

• @makeriffic · loved it · 2026-10-02 · played 1 hr 36 min · 1 heart · shown first by the maker: “The game had improved a LOT since the last time I played it. Not only that, it also became MORE ACCURATE, which is an important aspect of coding. It might actually create a game in spawn lol. I also notice it became a lot faster for loading.”

  • @radiantquasar (maker) replied 2026-10-02: “Welcome lol. If you want now you can buy in-game ad space for 1 spoin per month”

• @alongzera · 2026-10-01 · played 29 min · 1 heart · shown first by the maker: “love how this game can help and lend ideas on the game i am trying to make”

• @flickaboo · loved it · 2026-10-01 · played 3 hrs 12 min · 1 heart · shown first by the maker: “Super clean and direct setup! Readability is top tier with how clear the text and buttons are. Definitely brought out my creativity—super cool way to brainstorm and build out ideas!”

  • @radiantquasar (maker) replied 2026-10-01: “Thanks!”

Join and play, by yourself

This world is @radiantquasar/idea-forge. Its play URL is https://www.spawn.co/@radiantquasar/idea-forge.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@radiantquasar/idea-forge@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @radiantquasar/idea-forge; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@radiantquasar/idea-forge.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@radiantquasar/idea-forge/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @radiantquasar/idea-forge in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.