What is Aseprite_MCP CLAUDE.md?

Project instructions for Aseprite_MCP, a server that lets an AI create pixel art in Aseprite, a pixel-art editor. They cover installation, running the project, its architecture, and tests.

Use them when installing, changing, or testing the Aseprite MCP server, including its Python server, Lua scripts, drawing tools, and end-to-end tests.

They give an agent the repository-specific information needed to work on the project and run the right tests, including tests that do not require Aseprite itself.

How ZhangDongyang800/Aseprite_MCP configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ZhangDongyang800/Aseprite_MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ZhangDongyang800/Aseprite_MCP/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ZhangDongyang800/Aseprite_MCP

Made for: Claude Code.

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/instructions/zhangdongyang800/aseprite_mcp/claude-md/github.svg)](https://agentmods.dev/instructions/zhangdongyang800/aseprite_mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/zhangdongyang800/aseprite_mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zhangdongyang800/aseprite_mcp/claude-md/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/instructions/zhangdongyang800/aseprite_mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zhangdongyang800/aseprite_mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,889 This file is loaded in full into every session.

When invoked 1,889 The same file — it is already loaded in full.

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

Origin original No closer match found 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	$0.01889	$0.01889
Opus 5.5	$0.00756	$0.00756
Sonnet 5.5	$0.00378	$0.00378
Haiku 4.5	$0.00189	$0.00189

Measured 15d ago against content hash 2dfdff4f7a28, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Aseprite_MCP CLAUDE.md 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 15d ago.

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.

CLAUDE.md · 130 lines

How it starts

The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Aseprite MCP Server — an MCP (Model Context Protocol) server that lets AI create pixel art in Aseprite. It exposes exactly three tools via FastMCP — apply_operations, inspect, run_lua — backed by an op registry whose Lua runs inside Aseprite either through CLI subprocess (aseprite -b) or via a WebSocket bridge to a running Aseprite instance.

Install & Run

pip install -e .

Run Tests

# All tests (unit, fast)
pytest

# All tests with verbose output
pytest -v

# Specific test file
pytest tests/test_draw_tools.py -v

# Single test
pytest tests/test_draw_tools.py::test_draw_pixel -v

# Exclude e2e tests (require real Aseprite)
pytest -m "not e2e"

# Run e2e only
pytest -m e2e

Tests live in tests/ and use mock runners (mock_runner fixture in conftest.py) to avoid requiring Aseprite. Markers: e2e for tests requiring a real Aseprite installation.

Architecture

Dual-Mode Execution

                    ┌─────────────────────┐
                    │    Python MCP Server │ (FastMCP)
                    │      server.py       │
                    └──────┬──────┬────────┘
                           │      │
              CLI mode     │      │  Live/WebSocket mode
              (subprocess) │      │
                           ▼      ▼
                    ┌──────────┬──────────────┐
                    │AsepriteRunner│WebSocketRunner│
                    │  (runner.py)  │  (runner.py)  │
                    └──────┬───────┴──────┬───────┘
                           │              │
                           ▼              ▼ (via bridge.py)
                    aseprite -b        WebSocketBridge
                    --script x.lua     (ws://127.0.0.1:9001)
                           │              │
                           ▼              ▼
                      Lua scripts    extension/main.lua
                      (scripts/)     (inside Aseprite)

Read the full file on GitHub · 130 lines

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.

15d ago Changed · +1 lines · -33 tokens per session 2dfdff4f7a28
21d ago Changed · -6 lines · -176 tokens per session 9fc752fd827e
2mo ago First seen · 135 lines · 2,098 tokens per session scan A d821778dfc4a

Subscribe to this mod's changes

Aseprite_MCP CLAUDE.md is an instructions file published in the GitHub repository ZhangDongyang800/Aseprite_MCP (17 stars, last pushed 4d ago), licensed MIT. It adds 1,889 tokens to every session, about $0.0076 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Creative and media Game development

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Aseprite_MCP: Instructions file for Claude Code