Is the Pyxel Game Development skill free?

Yes. The skill itself is free from kitao/pyxel-skill. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Pyxel Game Development SkillProof Score?

10.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 10/10, docs & honesty 5/5.

How do I install Pyxel Game Development?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Pyxel Game Development with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Pyxel Game Development

Builds and verifies Pyxel games using real headless validate/run evidence, not vibes.

by kitao · kitao/pyxel-skill

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 10.0/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 18, 2026 · 72b4220

Ran the real pyxel-mcp validate+run tools against two versions of a moving-square game: the naive baseline skipped pyxel.cls() and validate flagged it live, then a headless run proved the bug on screen - screen_grid showed 368 nonzero pixels (a smeared ghost trail) versus exactly 64 (a clean 8x8 sprite) once the skill's cls()-first convention was applied.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 10/10
Docs & honesty 5/5

What Pyxel Game Development does

A proportional workflow skill for building and verifying Pyxel retro-game code in Python, driven through the pyxel-mcp observation toolset (validate, run, pyxel_info, read_palette/image/tilemap/audio, diff_frames). Triggers on requests to make, modify, debug or verify a Pyxel game, and explicitly excludes other engines or general Python work.

How to install Pyxel Game Development

git clone https://github.com/kitao/pyxel-skill.git ~/.claude/skills/pyxel
rm -rf ~/.claude/skills/pyxel/.git

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Pyxel Game Development

/pyxel Builds and verifies Pyxel games using real headless validate/run evidence, not vibes.

It also activates on plain-language prompts like these:

My Pyxel game has a smeared sprite trail, can you debug it?
Run my Pyxel game headless and check the screen output for bugs
Build a simple moving-square game in Pyxel and verify it works

Frequently asked questions

Is the Pyxel Game Development skill free?: Yes. The skill itself is free from kitao/pyxel-skill. SkillProof publishes the install command and an independent test verdict at no cost.
Does Pyxel Game Development work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Ran the real pyxel-mcp validate+run tools against two versions of a moving-square game: the naive baseline skipped pyxel.cls() and validate flagged it live, then a headless run proved the bug on screen - screen_grid showed 368 nonzero pixels (a smeared ghost trail) versus exactly 64 (a clean 8x8 sprite) once the skill's cls()-first convention was applied.
What is the Pyxel Game Development SkillProof Score?: 10.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 10/10, docs & honesty 5/5.
How do I install Pyxel Game Development?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Pyxel Game Development with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.