A code-based art tool for making 2D game assets and layouts from text specifications and scripts, without an image-generation model. It can produce items such as pixel sprites, SVG props, effects, character rigs, tile sets, and top-down layouts when explicitly requested.

Use it for code-drawn sprites, icons, interface elements, effects, character rigs, autotiles, parallax scenes, or playable top-down layouts.

It provides a defined way to create certain game visuals when the artwork should come from code rather than an image model. It also makes the source and rendering process explicit.

codeart2d — Skill for Claude Code and Codex by gabrielmoreira

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add gabrielmoreira/agent-skills-mirror --skill codeart2d

Clone the repo

git clone --depth 1 https://github.com/gabrielmoreira/agent-skills-mirror

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/gabrielmoreira/agent-skills-mirror/codeart2d/github.svg)](https://agentmods.dev/skills/gabrielmoreira/agent-skills-mirror/codeart2d)

Your own site

<a href="https://agentmods.dev/skills/gabrielmoreira/agent-skills-mirror/codeart2d"><img src="https://agentmods.dev/badge/skills/gabrielmoreira/agent-skills-mirror/codeart2d/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/gabrielmoreira/agent-skills-mirror/codeart2d"><img src="https://agentmods.dev/badge/skills/gabrielmoreira/agent-skills-mirror/codeart2d.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 186 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,506 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00186	$0.02506
Opus 5.5	$0.00074	$0.01002
Sonnet 5.5	$0.00037	$0.00501
Haiku 4.5	$0.00019	$0.00251

Measured 10d ago against content hash 6d00b1e35d29, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codeart2d scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

The scan reads SKILL.md. This mod also ships 15 executable files (references/runtime/fx-template.mjs, scripts/ambient_bake.py, scripts/autotile_build.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to codeart2d — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

mirrors/repos/0x0funky@agent-sprite-forge/skills/codeart2d/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Art 2D

You write the art as text (PixelSpec JSON, portable SVG, rig, FX, material, layout or parallax specs); the scripts render, check and package it. No image model is involved. It is a declared art source (art_source: "code"), not a placeholder.

Use when

The user explicitly asks for code-drawn art: a PixelSpec or SVG sprite, palette variants drawn in code, a code rig, code FX, a seam-proven autotile set, a code-made layout, stylized parallax or ambient loops.
route_media.py prints no-route (exit 3): no API key is configured and no local image or video route exists. Say so, and offer to add a key or a CLI as well.
Pose and layout guides that help an image model (support material, not final art).

Do not use when

Any art request while an image or video route exists and the user did not ask for code art: generate2dsprite, generate2dmap or video2dsprite generate it.
Painterly, organic or identity-rich art, likenesses, portraits, HD-2D plates or textured terrain; realistic fire, smoke or water.
Never trace licensed characters into specs.

Capability check (once per session)

Run python "<skill-dir>/../generate2dmedia/scripts/route_media.py" resolve --kind image (or --kind video): when it names a route, the image or video skill takes the request unless the user asked for code art. forge_doctor.py in the same folder shows the full picture. If encoding.stdout fails, set PYTHONUTF8=1. For SVG work also run svg_render.py doctor --report <new.json> once per machine.

Art source

This skill is the explicit-only last resort of the route order: the API when a key is configured, then the local image tools, then code art, only when the user asks for it or no route exists. Never substitute it silently for generated art. Before you draw, check what code art can and cannot draw well in style-envelope.md (its table describes strengths, not the route order), and tell the user when a request needs an image model. Disclose every result: "code-drawn, no image model" (codeart-meta.json records "art_source": "code"); never present it as image-model output.

Read the full file on GitHub · 83 lines

Files

What ships with it

41 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago First seen · 83 lines · 186 tokens per session scan A 6d00b1e35d29

Subscribe to this mod's changes

codeart2d is a skill published in the GitHub repository gabrielmoreira/agent-skills-mirror (19 stars, last pushed yesterday), licensed MIT. It adds 186 tokens to every session and 2,506 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to codeart2d, differing in 0 lines, and is treated as a copy.

Creative and media Game development

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Structured playtest report template, or turn existing playtest notes into structured feedback.

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codeart2d