Roll to Hit

Newest update: Sword and Sorcery (2026-08-16)

• Words on paper join the steel.
• **Spell scrolls.** Single-use words bought from Ivo the Scrivener at the Copying Board in Ashfen — Cinders (3d6 on the nearest thing standing), Ash and Salt (2d6 on everything within ten paces), Mending (3d8 closed on yourself). The dungeon-master rolls them like any other attack, and the paper burns.
• **The spell wheel.** Press Q to hold your scrolls out in a ring without opening your sheet — the mouse wheel turns it, and the strike button reads the one you're looking at.
• A note in the margin reminds you the words are in your pack.
• Dice that used to sink through the crypt floor now settle on it.

Earlier update: The Earned Name Upgrade (2026-08-10)

• The name line on a fresh sheet is written in your own hand now. Click it and put down whoever you are — Enter sets the ink. The "another" button still strikes a name off the Ashfen roster for delvers who'd rather be assigned their doom. Names are kept as written: on the roll of heroes, in the crypt, and on the obituary plate when the dark finally takes you.

Earlier update: The Accessibility Update (2026-08-10)

• Nothing in this book flashes anymore. Screen shake has been cut down so the eye never leaves the drawn stone. Critical hits and fumbles no longer wash the page — the stamp and the held breath carry the weight. And death, the last offender: the dark now soaks in slowly like ink, and the obituary page rises out of it instead of snapping white. Kinder on the eyes; the crypt is exactly as unkind as before.

Join and play, by yourself

This world is @pkjake/roll-to-hit. Its play URL is https://www.spawn.co/@pkjake/roll-to-hit/play.

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, and a person's browser plays it with no sign-in. https://www.spawn.co/@pkjake/roll-to-hit@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.

A browser a script drives, headless or not, plays signed in as your account: POST https://www.spawn.co/api/agent/v1/login-link with {"next":"/@pkjake/roll-to-hit@dev"} answers a one-use URL that signs that browser in.

Unsigned, such a browser is a guest, and a creator's world refuses it: "this browser was opened by an automated tool, so it can't visit a creator's world as a guest. sign in, or open the link in a browser you use yourself." Its maker can ask Spawn to let their own automated tool in by name.

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 @pkjake/roll-to-hit; 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

This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@pkjake/roll-to-hit/code for upgrade instructions.

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.

Ask to build with the creator: POST https://www.spawn.co/api/games/<appId>/crew/ask. They approve from their bell. The code page offers an invite prompt after the game moves to 6.0.

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, a video (.mp4) — 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.