rembg-mcp: Instructions file for Claude Code

CLAUDE.md

rembg-mcp CLAUDE.md is an instructions file for Claude Code from holocode-ai/rembg-mcp. It costs 1,157 tokens per session, scanned A, original, MIT.

Developer instructions for an MCP wrapper around rembg, a Python library that removes backgrounds from images using machine-learning models. An MCP wrapper makes that library available to an AI assistant through a standard interface.

In plain words
What is it for?
It is for developing and testing the rembg MCP wrapper, including background removal with CPU or GPU setups and checks such as formatting, linting, and type checking.
Why use it?
It records the supported Python versions, installation options, development commands, and code-quality checks contributors need.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is holocode-ai/rembg-mcp's own configuration. It tells Claude Code how to work on rembg-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything rembg-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to holocode-ai/rembg-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/holocode-ai/rembg-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/holocode-ai/rembg-mcp

Made for: Claude Code.

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Per session 1,157 This file is loaded in full into every session.
When invoked 1,157 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01157 $0.01157
Opus 5 $0.00579 $0.00579
Sonnet 5 $0.00231 $0.00231
Haiku 4.5 $0.00116 $0.00116

Measured 9d ago against content hash 5fe5568640ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

rembg-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 9d 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 · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 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

This is an MCP (Model Context Protocol) implementation for rembg, a popular Python library for removing image backgrounds using machine learning models. The main rembg codebase is located in a separate directory and this directory serves as the MCP wrapper implementation.

Rembg is a tool that removes image backgrounds using various pre-trained models including U2Net, BiRefNet, ISNet, and SAM. It supports both CLI usage and library integration with multiple input/output formats (PIL, OpenCV, bytes).

Development Commands

Python Environment

  • Python Version: 3.10-3.13 (as specified in rembg's setup.py)
  • Package Manager: pip with setuptools

Testing

# Run tests (if rembg source is available)
python -m pytest

Development Installation

# Install rembg in development mode
pip install -e ".[dev,cpu,cli]"  # or [gpu] for GPU support

Code Quality

# Code quality tools
black .          # Code formatting
flake8 .         # Linting
isort .          # Import sorting
mypy .           # Type checking
bandit .         # Security analysis

Architecture Overview

Core Components (from github/rembg/)

  1. rembg/bg.py - Main background removal logic with remove() function
  2. rembg/session_factory.py - Factory for creating model sessions (new_session())
  3. rembg/sessions/ - Model-specific implementations:
    • base.py - BaseSession abstract class
    • Individual model sessions (u2net, birefnet, isnet, sam, etc.)
  4. rembg/commands/ - CLI command implementations (i, p, s, b subcommands)
  5. rembg/cli.py - Main CLI entry point using Click

Session Pattern

The library uses a session pattern for model management:

  • new_session(model_name) creates a session with ONNX runtime
  • Sessions handle model downloading, normalization, and prediction
  • Reusing sessions across multiple images improves performance

Read the full file on GitHub · 144 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.

  1. 9d ago First seen · 144 lines · 1,157 tokens per session scan A 5fe5568640ab

Subscribe to this mod's changes

rembg-mcp CLAUDE.md is an instructions file published in the GitHub repository holocode-ai/rembg-mcp (4 stars, last pushed 11mo ago), licensed MIT. It adds 1,157 tokens to every session, about $0.0058 per session on Opus 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.

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