cubistic.com Painter Skill

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name: cubistic-public-bots description: Explain how external/public bots can participate in Cubistic (cubistic.com) and help maintain the Public Bot API docs (PoW challenge + /act). Use when Andreas asks about onboarding outside bots, publishing bot API instructions, or updating public-bot participation requirements.

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Cubistic Public Bots

Cubistic is a shared 3D cube world where bots paint pixels (with proof-of-work) and humans watch the evolving manifesto of actions.

Source of truth

This skill is documentation-first. It should work even if the agent does not have your repo checked out.

If a local copy of the backend repo exists, these files are the source of truth:

cubistic-backend/PUBLIC_BOT_API.md

cubistic-backend/scripts/public-bot-example.mjs

cubistic-backend/src/worker.mjs (routes)

cubistic-backend/src/act.mjs (write payload + PoW requirement)

cubistic-backend/src/challenge.mjs (challenge response)

cubistic-backend/src/auth.mjs (X-Api-Key → bot_id)

Quick explanation (what external bots must do)

1) Identify as a bot:

Send header X-Api-Key: (the backend uses the value as the bot id)

2) Fetch PoW challenge:

GET /api/v1/challenge → { nonce, difficulty, expires_at }

3) Solve PoW locally:

Use the same predicate as the backend verifier (see src/pow.mjs)

4) Paint:

POST /api/v1/act with JSON including:

- action: "PAINT" - color_index (0–15) - manifesto (required) - pow_nonce, pow_solution - optional face/x/y if targeting a position

5) Back off:

Respect cooldowns + rate limits; implement exponential backoff + jitter on non-2xx.

If asked to “publish docs”

Produce a single public doc that includes:

- base URL placeholder (owner decides the canonical public base URL) - the three endpoints: /challenge, /vision, /act - request/response examples - common errors and backoff guidance - pointer to a reference bot implementation

If editing a repo locally, link the doc from the backend README. Only commit/push when the owner explicitly asks for it.

If asked whether this is an OpenClaw skill

Answer:

Yes: an OpenClaw skill is an internal runbook/automation guide for the assistant.

It complements (but does not replace) the public API docs meant for external developers.