An image-background removal tool that uses rembg, an artificial-intelligence image-processing program, to isolate a subject and create a transparent PNG.

Use it to remove a background, isolate a person or object, or prepare an image with transparency.

It removes the need to cut out subjects by hand and can keep the subject separate from the original background.

remove-bg — Skill for Claude Code by hmaurus/masterclaude

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add hmaurus/masterclaude

Claude Code

/plugin install image-tools

Made for: Claude Code.

Or install image-tools, the plugin that ships this one along with the rest of its 4 skills.

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/hmaurus/masterclaude/remove-bg/github.svg)](https://agentmods.dev/skills/hmaurus/masterclaude/remove-bg)

Your own site

<a href="https://agentmods.dev/skills/hmaurus/masterclaude/remove-bg"><img src="https://agentmods.dev/badge/skills/hmaurus/masterclaude/remove-bg/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/hmaurus/masterclaude/remove-bg"><img src="https://agentmods.dev/badge/skills/hmaurus/masterclaude/remove-bg.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 920 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 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	$0.00080	$0.00920
Opus 5.5	$0.00032	$0.00368
Sonnet 5.5	$0.00016	$0.00184
Haiku 4.5	$0.00008	$0.00092

Measured 1mo ago against content hash 8431abaab3b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

remove-bg 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 1mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/remove_bg.py, scripts/setup.sh), 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.

plugins/image-tools/skills/remove-bg/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Remove Background de Imagem

Remove o fundo de imagens usando rembg (modelo U²-Net), instalado em virtualenv isolado em ~/venvs/rembg/.

Setup

O rembg fica em ~/venvs/rembg/ para não poluir o sistema. Na primeira vez, o setup precisa ser executado.

Verificar se já está instalado

test -f ~/venvs/rembg/bin/rembg && ~/venvs/rembg/bin/rembg --version || echo "PRECISA_INSTALAR"

Instalar (se necessário)

bash ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/setup.sh

Na primeira execução do rembg, o modelo U²-Net (~170MB) é baixado automaticamente para ~/.u2net/. Avisar o usuário sobre esse download.

Uso

O script wrapper fica em ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py.

Imagem única (saída automática — padrão)

Sem argumento de saída, renomeia a original para _original e salva a imagem sem fundo com o nome original:

# foto.png → foto_original.png (com fundo) + foto.png (sem fundo)
~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py foto.png

Com saída explícita

~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py entrada.png saida.png

Com modelo para pessoas

~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py retrato.jpg -m u2net_human_seg

Com alpha matting (bordas mais suaves)

~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py foto.png -a -ae 10 -ab 10

Batch (pasta inteira)

# Com pasta de saída separada
~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py pasta_entrada/ pasta_saida/

# In-place (renomeia originais para _original, salva limpas no nome original)
~/venvs/rembg/bin/python ${CLAUDE_PLUGIN_ROOT}/skills/remove-bg/scripts/remove_bg.py pasta/

Opções

Flag	Descrição
`-m <modelo>`	Escolher modelo (ver tabela abaixo)
`-a`	Ativar alpha matting (bordas mais suaves)
`-ae <N>`	Erosão do alpha matting (padrão: 10)
`-ab <N>`	Blur do alpha matting (padrão: 10)

Read the full file on GitHub · 102 lines

Files

What ships with it

2 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.

1mo ago First seen · 102 lines · 80 tokens per session scan A 8431abaab3b9

Subscribe to this mod's changes

remove-bg is a skill published in the GitHub repository hmaurus/masterclaude (2 stars, last pushed 3mo ago), licensed MIT. It adds 80 tokens to every session and 920 once invoked, about $0.0003 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

local-ai-agents

Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…

microsoft/ai-agents-for-beginners · 200 tokens

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

insight-error-page

Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new errors/ .mdx page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification…

vercel/next.js · 83 tokens