How do I install the Palette Enforcer skill?

Run npx skillmds@latest add ar9av/palette-enforcer in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Palette Enforcer safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Palette Enforcer?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Palette Enforcer free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Palette Enforcer?

Ar9av (@ar9av) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Palette Enforcer by ar9av — Agent Skill

Name: Palette Enforcer
Author: Ar9av

Palette Enforcer

Quantizes all generated PNG assets (sprites, tiles, background) to a named 8-bit color palette to achieve visual coherence. Run after sprite-artist, tile-artist, and bg-artist, before codesmith. Writes state.style.palette so downstream skills know the chosen palette.

Ar9av c780b3a 3 files · 7.1 KB Updated Sep 17, 2026

File contents

Palette Enforcer — Visual Coherence

Applies color palette constraints to all generated PNG assets so every sprite, tile, and background shares the same enumerated color set. Without this, GPT Image 2 returns arbitrary colors and assets from the same game look like they came from different games.

When to use

After all art generation (sprite-artist, tile-artist, bg-artist) and before codesmith. Also run if the user says "make the art more cohesive" or "unify the palette."

Palettes available

ID	Colors	Best for
`sweetie-16`	16	Default — friendly, any genre
`pico8`	16	Bold retro, shoot-em-ups, platformers
`endesga-32`	32	RPGs, dungeon crawlers, rich detail
`gameboy`	4	Maximum constraint, mono-theme games
`nes`	16	Classic NES aesthetic

Output contract

All PNGs in public/assets/ are overwritten in-place with palette-quantized versions.
game-state.json gains state.style.palette with the chosen palette ID.
Transparent pixels (alpha < 128) are preserved; only opaque pixels are quantized.
The magenta chroma-key background (#FF00FF) is kept as-is — it's stripped later at runtime.

// game-state.json after running
{
  "style": {
    "palette": "sweetie-16"
  }
}

Process

Choose palette: use --palette <id> arg, or auto-select based on genre:
- platformer / action-platformer → pico8
- top-down-rpg / dungeon-crawler → endesga-32
- shoot-em-up → pico8
- default → sweetie-16
Run scripts/enforce_palette.mjs <project-dir> [--palette <id>]
Script processes all PNGs found in public/assets/ and writes them back.
Writes state.style.palette to game-state.json.

Scripts

scripts/enforce_palette.mjs <project-dir> [--palette <id>] — quantize all assets.

References

references/palettes.json — all palette definitions with hex color arrays.

---name: palette-enforcerdescription: Quantizes all generated PNG assets (sprites, tiles, background) to a named 8-bit color palette to achieve visual coherence. Run after sprite-artist, tile-artist, and bg-artist, before codesmith. Writes state.style.palette so downstream skills know the chosen palette.---# Palette Enforcer — Visual CoherenceApplies color palette constraints to all generated PNG assets so every sprite, tile, and background shares the same enumerated color set. Without this, GPT Image 2 returns arbitrary colors and assets from the same game look like they came from different games.## When to useAfter all art generation (sprite-artist, tile-artist, bg-artist) and before codesmith. Also run if the user says "make the art more cohesive" or "unify the palette."## Palettes available| ID | Colors | Best for ||---|---|---|| `sweetie-16` | 16 | Default — friendly, any genre || `pico8` | 16 | Bold retro, shoot-em-ups, platformers || `endesga-32` | 32 | RPGs, dungeon crawlers, rich detail || `gameboy` | 4 | Maximum constraint, mono-theme games || `nes` | 16 | Classic NES aesthetic |## Output contract- All PNGs in `public/assets/` are overwritten in-place with palette-quantized versions.- `game-state.json` gains `state.style.palette` with the chosen palette ID.- Transparent pixels (alpha < 128) are preserved; only opaque pixels are quantized.- The magenta chroma-key background (#FF00FF) is kept as-is — it's stripped later at runtime.```jsonc// game-state.json after running{ "style": { "palette": "sweetie-16" }}```## Process1. Choose palette: use `--palette <id>` arg, or auto-select based on genre: - `platformer` / `action-platformer` → `pico8` - `top-down-rpg` / `dungeon-crawler` → `endesga-32` - `shoot-em-up` → `pico8` - default → `sweetie-16`2. Run `scripts/enforce_palette.mjs <project-dir> [--palette <id>]`3. Script processes all PNGs found in `public/assets/` and writes them back.4. Writes `state.style.palette` to `game-state.json`.## Scripts- `scripts/enforce_palette.mjs <project-dir> [--palette <id>]` — quantize all assets.## References- `references/palettes.json` — all palette definitions with hex color arrays.

Frequently asked questions