Agent skill

Image Remove Background

Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet).

Install Image Remove Background

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/image-remove-background .claude/skills/image-remove-background && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .claude/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/image-remove-background .agents/skills/image-remove-background && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .agents/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/image-remove-background .cursor/skills/image-remove-background && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .cursor/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/godot-fun/gai.git --path .agents/skills/image-remove-background

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/image-remove-background .gemini/skills/image-remove-background && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .gemini/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/image-remove-background .github/skills/image-remove-background && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .github/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add godot-fun/gai --skill image-remove-background -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install godot-fun/gai image-remove-background --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/godot-fun/gai.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/image-remove-background .opencode/skills/image-remove-background && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "image-remove-background" agent skill from https://github.com/godot-fun/gai/tree/main/.agents/skills/image-remove-background into .opencode/skills/image-remove-background/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "image-remove-background", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: image-remove-background
GitHub stars: 182
Token cost: ~1.5k tokens
SKILL.md length: 531 words
Files: 1
Skills in repo: 36
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet).

Works in 6 steps: Paths — Pass whatever image path the… → One file per run — process one image,… → Pick model — u2net for generic assets;… → …
The user wants background removal
SKILL.md covers Rules, Setup (first run), Quick Start and Model selection, plus 7 more sections
Calls python and git

What it does

Image Remove Background is an agent skill from godot-fun/gai. Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet). Use when the user wants background removal, matting, cutout, background cutout, transparent sprites, alpha PNG export, or remove background from a game/UI asset.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Image editing. It works with Python. The repository describes itself as: A lightweight AI agent and skill workflow framework built with Godot. The licence is MIT.

When your agent uses it

The user wants background removal
Background cutout
Transparent sprites
Alpha PNG export

Example prompts

“Use the image-remove-background skill to remove image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet)”
“/image-remove-background”

Requirements

Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

Paths — Pass whatever image path the user gives or the chat path directly. Output lands in image-remove-background/` next to that file by…
One file per run — process one image, verify the result, then repeat for additional files if needed.
Pick model — u2net for generic assets; birefnet-portrait for characters; birefnet-general when quality matters.
Soft edges — try --alpha-matting if halos or jagged hair/fur appear.
Already transparent — script still runs; rembg re-mats from visible RGB. Warn user if source already has alpha.
Revert — delete output file or git restore if needed; sources are never modified.

What it can do on your machine

Read from SKILL.md and the folder at commit aff659b. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- python
- git
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Image Remove Background loads about 1.5k tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 531 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~68
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from godot-fun/gai at commit aff659b, republished under its MIT licence (© godot-fun). 531 words, ~1,472 tokens.

Download SKILL.mdSave it as .claude/skills/image-remove-background/SKILL.md (or your agent's skills folder).

name: image-remove-background
description: Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet). Use when the user wants background removal, matting, cutout, background cutout, transparent sprites, alpha PNG export, or remove background from a game/UI asset.

Image Remove Background (rembg)

Remove image backgrounds with AI matting via rembg. Output is RGBA PNG with transparent background — ready for Godot sprites and UI.

Rules

When this skill applies, read and follow skill-dependency-manager — run scripts as documented, install missing tools into .dependency/.

Run remove_background.py through the rembg manifest entry (.dependency/rembg/.venv/). Never use host python, py, python3, or any interpreter outside .dependency/.
Do not hand-write rembg i / rembg p — use the bundled script.
Single file only. Pass one image with --image; directories are not supported.
populated: false for rembg is not a reason to skip. Install first, set populated: true, retry the same command.
Pass the input path as-is (chat attachment path, Downloads/foo.png, project folder, etc.). Output goes to <image-dir>/image-remove-background/ by default — no path rewriting.
Never overwrite source files. Output lands in image-remove-background/ or --output.

Setup (first run)

From project root:

bash

.dependency/python/python -m venv .dependency/rembg/.venv
.dependency/rembg/.venv/Scripts/python.exe -m pip install "rembg[cpu]"

GPU (CUDA) — faster processing:

bash

.dependency/rembg/.venv/Scripts/python.exe -m pip install "rembg[gpu]"

json

"rembg": {
  "populated": true,
  "bin": ".dependency/rembg/.venv/Scripts/python.exe"
}

Use bin/python on Unix. Model weights download on first run (~hundreds of MB).

Quick Start

Default: create an image-remove-background/ folder beside the input file and write the PNG there (never overwrites sources):

bash

# image/sprites/hero.png → image/sprites/image-remove-background/hero.png
.dependency/rembg/.venv/Scripts/python.exe .ai/image-remove-background/remove_background.py --image image/sprites/hero.png

Custom output path:

bash

.dependency/rembg/.venv/Scripts/python.exe .ai/image-remove-background/remove_background.py --image image/sprites/hero.png -o image/sprites/hero_cutout

Model selection

Model	Use case
`u2net` (default)	General objects, icons, props
`u2netp`	Faster / lighter; smaller assets
`isnet-general-use`	Higher quality general matting
`birefnet-general`	Best general quality (slower)
`birefnet-portrait`	Characters / portraits
`u2net_human_seg`	Human figures only

bash

.dependency/rembg/.venv/Scripts/python.exe .ai/image-remove-background/remove_background.py --image image/character.png --model birefnet-portrait

Edge quality (alpha matting)

For hair, fur, or soft edges, enable alpha matting:

bash

.dependency/rembg/.venv/Scripts/python.exe .ai/image-remove-background/remove_background.py --image image/portrait.png --alpha-matting

Defaults

Option	Default	Notes
`--image`	Required	Single supported image file
Output	`<image-dir>/image-remove-background/<name>.png`	Use `-o` / `--output` for custom file or directory
`--model`	`u2net`	See table above
`--alpha-matting`	off	Enable for fine edge detail
`--crop`	off	Trim transparent borders after matting

Supported inputs: .png, .jpg, .jpeg, .webp, .gif, .bmp, .tif, .tiff, .avif, .ico.

Show full SKILL.md (251 more words)Show less

Agent Workflow

Paths — Pass whatever image path the user gives or the chat <image_files> path directly. Output lands in image-remove-background/ next to that file by default.
One file per run — process one image, verify the result, then repeat for additional files if needed.
Pick model — u2net for generic assets; birefnet-portrait for characters; birefnet-general when quality matters.
Soft edges — try --alpha-matting if halos or jagged hair/fur appear.
Already transparent — script still runs; rembg re-mats from visible RGB. Warn user if source already has alpha.
Revert — delete output file or git restore if needed; sources are never modified.

Agent Notes

Use the bundled script, not hand-written rembg CLI commands.
Missing rembg venv → populate .dependency/ per skill-dependency-manager, retry same command.
Do not copy, move, or replace the source with cutout output — tell the user where the output file is.
Flat white/green/magenta AI backgrounds → prefer image-remove-white-background over rembg.
Need trim borders after matting → image-trim.

Troubleshooting

Issue	Fix
`rembg` missing	Follow Setup; update manifest
Directory passed to `--image`	Run once per file; this skill accepts image files only
Output already exists	Delete the existing output or choose a different `-o` path
Very slow	Install `rembg[gpu]`; try `--model u2netp`
Jagged edges	`--alpha-matting`
Wrong subject removed	Switch model; try `birefnet-general`
Leftover background color	Re-run with `--alpha-matting`; check source contrast
OOM on large images	Script auto-downscales inputs above 4096 px longest side

CLI

Copy-paste commands: cli/image-remove-background.md

Flat white/green/magenta AI backgrounds: image-remove-white-background (prefer over rembg)
rembg docs: https://github.com/danielgatis/rembg

Files

Just SKILL.md in .agents/skills/image-remove-background of godot-fun/gai.

Open the folder on GitHubat commit aff659b

Compare with similar skills

Image Remove Background next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Image Remove Background compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Image Remove Background this skillgodot-fun/gai	182	—	~1.5k	Automated safety check: Pass	MIT	today
Fal AI Generationwitnesstodark/mr-mak-workspace	336	—	~1k	Automated safety check: Notes	MIT	2 days ago
Stable Diffusion with DiffusersOrchestra-Research/AI-Research-SKILLs	13k	6 repos	~3.2k	Automated safety check: Pass	MIT	3 mo ago
Krita CLI HarnessHKUDS/CLI-Anything	52k	—	~931	Automated safety check: Pass	Apache-2.0	16 days ago
Image Processingjezweb/claude-skills	1.1k	—	~1.8k	Automated safety check: Pass	MIT	2 days ago
UAV Trajectory Overlay from VideoXXLiu-HNU/visualize_uav_trajectory	242	—	~535	Automated safety check: Pass	GPL-3.0	11 days ago

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Questions about Image Remove Background

What does Image Remove Background do?

Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet). Image Remove Background is an agent skill from godot-fun/gai. Removes image backgrounds and exports transparent PNGs using rembg (U2Net / BiRefNet).

When should I use Image Remove Background?

Image Remove Background fits situations like: the user wants background removal; background cutout; transparent sprites; alpha PNG export.

How do I install Image Remove Background in Claude Code?

Run `npx skills add godot-fun/gai --skill image-remove-background -a claude-code`. Or copy the skill folder (.agents/skills/image-remove-background in godot-fun/gai) into .claude/skills/image-remove-background in your project. Claude Code loads it when a task matches its description.

How do I install Image Remove Background in Codex?

Run `npx skills add godot-fun/gai --skill image-remove-background -a codex`. Or copy the skill folder (.agents/skills/image-remove-background in godot-fun/gai) into .agents/skills/image-remove-background in your project. Codex loads it when a task matches its description.

Can I use Image Remove Background in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add godot-fun/gai --skill image-remove-background -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/image-remove-background, .gemini/skills/image-remove-background, .github/skills/image-remove-background and .opencode/skills/image-remove-background in your project.

What does Image Remove Background need to run?

Going by SKILL.md and its folder, Image Remove Background needs the command-line tools its instructions call (python and git). Our summary lists: Python 3.

Does Image Remove Background access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Image Remove Background safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Image Remove Background use?

Image Remove Background is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Image Remove Background use?

About 1.5k tokens (SKILL.md is roughly 5.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Image Remove Background?

Skills that share tags, products or a category with Image Remove Background: Fal AI Generation (witnesstodark/mr-mak-workspace, 336 stars), Stable Diffusion with Diffusers (Orchestra-Research/AI-Research-SKILLs, 13k stars), Krita CLI Harness (HKUDS/CLI-Anything, 52k stars) and Image Processing (jezweb/claude-skills, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Image Remove Background?

godot-fun (a GitHub organization) maintains it in godot-fun/gai, which has 182 GitHub stars. The repository holds 36 skills in this directory. The repository was last updated on October 8, 2026.

Source: godot-fun/gai on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Image Remove Background

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Image Remove Background (rembg)

Rules

Setup (first run)

Quick Start

Model selection

Edge quality (alpha matting)

Defaults

Agent Workflow

Agent Notes

Troubleshooting

CLI

Related

Files

Compare with similar skills

Similar skills

More from godot-fun/gai

Related

Questions about Image Remove Background