GEMSMITH

Newest update: Coppering Up Ships (2026-09-05)

• The grove snapshot now carries level 21, "coppering up", opening stage 2 — Copper Reach. The stage is still the cutter's draft until he shares it.

Earlier update: Level 21 Stays Put (2026-09-05)

• A freshly planted grove level no longer vanishes from the map a beat after it lands — the shipped grove snapshot only seeds a seat that has no grove yet, so the real campaign always wins. The stage table travels lighter too.

Earlier update: The Copper Objective (2026-09-05)

• New objective: Copper plates. Toggle it at the bench and the level asks players to break through every copper plate on the canvas.

Earlier update: Cut Into Any Stage (2026-09-04)

• Folded empty stages on the map now carry their own "+ cut into N" buttons, so a fresh level can start straight from the map.

Earlier update: Every Stage On The Table (2026-09-04)

• The cutter's table now lists every stage up to the last one named — no gaps — each ready to name, cut into, or share. Empty stretches fold into one line on the map until they hold levels.

What players say

• @mistarpudding · 2026-09-04 · played 1 hr 19 min · 1 heart: “hi!! i wanted to try the next levels but i couldnt seem to start the first puzzle even if i click on it or click on "Continue - First Puzzle". im able to play cuts from other smiths though. its just the grove that couldn't be played.”

  • @match3lover (maker) replied 2026-09-04: “Working on it I’m fixing it now”

• @jeon · 2026-09-12 · played 6 min: “Nice game bro, it kinda feels like im playing Candy Crush but with a twist haha. I really like how you made the gameplay different while still keeping that simple and fun feeling. Its really enjoyable to play, keep it up!”

• @larrielabs · 2026-09-05 · played 52 min: “I really like how detailed the how-to-play section is! The visuals are very cute, and the cheerful background music makes the game feel really fun and upbeat. I’m excited to keep playing and hopefully clear more levels soon! 😊”

• @makeriffic · 2026-09-04 · played 2 hrs 26 min: “I was so excited to play the game again and continue my progress in the grove. The last time that I played, I ended on the 12th one 'Stonecut' and I was sad to see my progress got reset :( did the grove change? I can now edit my own cuts thanks for the update!”

• @mistarpudding · 2026-09-03 · played 1 hr 19 min: “lots of new things added to the cutting bench means lots of new ideas for creators! im going to try them out and make a new level. :D the complexities seems very exciting, but guess i have to learn how they work first. i think the overlay needs to improved now that there are a lot more entities you can place. its kind of overwhelming for me to look at as of now”

Join and play, by yourself

This world is @match3lover/gemsmith. Its play URL is https://www.spawn.co/@match3lover/gemsmith.

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/@match3lover/gemsmith@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 @match3lover/gemsmith; 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/@match3lover/gemsmith.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/@match3lover/gemsmith/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @match3lover/gemsmith 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.