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Agent skill

Fab

by kevinpbuckley in kevinpbuckley/VibeUE

Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned…

MITAuto-check passedGame Development

Install Fab

skills CLI
$ npx skills add kevinpbuckley/VibeUE --skill fab -a claude-code

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

GitHub CLI
$ gh skill install kevinpbuckley/VibeUE fab --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/kevinpbuckley/VibeUE.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Content/Skills/fab .claude/skills/fab && 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/

Facts

Skill name
fab
GitHub stars
730
Token cost
~1.3k tokens
SKILL.md length
568 words
Files
1
Skills in repo
39
Repo updated
First seen
Licence
MIT

At a glance

Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned…

  • Works in 4 steps: Call search_free_catalog(query="",… → Show the chosen result and the Fab EULA… → Call `import_free_asset(listing_id,… → …
  • Free Fab/Quixel searches
  • SKILL.md covers Public free flow…, Owned-library flow and Rules
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Fab is an agent skill from kevinpbuckley/VibeUE. Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned Fab library. Use for free Fab/Quixel searches, owned-library questions, compatibility checks, and Fab imports. No purchasing or entitlement claiming.

Its SKILL.md is about 1.3k 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 Game Development. The repository describes itself as: Unreal Engine Vibe Coding tool. The licence is MIT.

When your agent uses it

  • Free Fab/Quixel searches
  • Owned-library questions
  • Compatibility checks

Example prompts

  • “/fab”

Workflow steps

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

  1. Call search_free_catalog(query="", seller_filter="Quixel Megascans", format_filter="gltf").
  2. Show the chosen result and the Fab EULA to the user. **Never set accept_eula=true on the user's
  3. Call `import_free_asset(listing_id, quality="High", format="gltf", license_slug="personal",
  4. Poll import_status(listing_id) until imported or failed, then verify a returned asset path with

What it can do on your machine

Read from SKILL.md and the folder at commit dc051be. 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

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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

Fab loads about 1.3k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 568 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~87
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

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 kevinpbuckley/VibeUE at commit dc051be, republished under its MIT licence (© kevinpbuckley). 568 words, ~1,268 tokens.

Download SKILL.mdSave it as .claude/skills/fab/SKILL.md (or your agent's skills folder).
name
fab
description
Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned Fab library. Use for free Fab/Quixel searches, owned-library questions, compatibility checks, and Fab imports. No purchasing or entitlement claiming.
display_name
Fab Asset Import
vibeue_classes
FabService
unreal_classes
EditorAssetLibrary
keywords
fab, fab.com, marketplace, free assets, quixel, megascans, owned assets, import asset, download asset, engine version compatibility

Fab asset import

FabService supports two deliberately separate paths:

  • Public free catalog: search exact zero-price listings and directly import eligible glTF/GLB downloads. This does not sign in, purchase, claim an entitlement, or add the listing to My Library.
  • Owned library: use the editor/launcher Epic session to list and import assets already owned by the account, including migrated Unreal Marketplace items.

Public free flow (Quixel/Megascans and other sellers)

  1. Call search_free_catalog(query="", seller_filter="Quixel Megascans", format_filter="gltf"). Results are compact and include id, title, seller, price, formats, thumbnail, and an opaque next_cursor. Results require an exact-zero Personal tier; UEFN-reference-only offers are excluded. No authentication is required.
  2. Show the chosen result and the Fab EULA to the user. Never set accept_eula=true on the user's behalf. It must represent their explicit acceptance.
  3. Call import_free_asset(listing_id, quality="High", format="gltf", license_slug="personal", accept_eula=true). The service re-fetches the listing and requires the selected license price to still be exactly zero before it requests a signed download.
  4. Poll import_status(listing_id) until imported or failed, then verify a returned asset path with unreal.EditorAssetLibrary.does_asset_exist(path).

Direct free imports land under /Game/Fab/Free/<Title>. The original archive is cached under the project's Saved/Fab/Free directory; no raw-file export API is exposed. ZIP paths are validated before extraction. The first version supports Fab glTF/GLB ZIPs through automated Unreal Interchange import. That is suitable for Quixel 3D assets, but it does not reproduce every private Megascans material setup or support every Fab product format yet.

Owned-library flow

  1. Call auth_status() first. If it is not authenticated, tell the user to open the Fab window or launch the editor from the Epic Games Launcher.
  2. Call list_library(...); use refresh=true only when the account library may have changed.
  3. Call get_asset(asset_id) to inspect versions and compatibility.
  4. Call import_asset(asset_id, ...), then poll import_status(asset_id).
  5. Verify the returned /Game/... paths before reporting success.

Owned BuildPatch packs and plugins are supported. Sparse or non-BuildPatch owned assets may still be discoverable without being importable through import_asset; use the public-free path only when the listing is currently free and provides a supported source format.

Rules

Show full SKILL.md (230 more words)Show less
Owned complete projects

Owned COMPLETE_PROJECT products are downloaded into Saved/Fab/Projects/<asset-id>. Poll until status: "staged" or failed; staged is a terminal download state, not an import into the active project. Inspect the returned staging_root, source .uproject engine association, and vendor merge instructions. Save and close Unreal before copying approved content folders into the host. Preserve vendor package paths, check destination collisions, and do not merge the sample project's config or .uproject. The remote build-service version string alone does not establish asset compatibility.

Import rules
  • Never purchase, claim, call add-to-library, or accept a license on the user's behalf.
  • Never treat a search filter as proof of price. import_free_asset performs the authoritative zero-price check immediately before download.
  • Never expose signed download URLs or offer to save distributable raw asset files elsewhere.
  • Imports are asynchronous and idempotent within the editor session; poll with a finite interval.
  • These Fab web endpoints are unofficial and may change. Surface their errors rather than retrying the same request blindly.

Every method returns a JSON string with success: true|false. Errors include error_code and error. If every method returns error_code: "UNSUPPORTED", the engine install VibeUE was built against lacks the engine Fab plugin (Engine/Plugins/Fab) and FabService was compiled out (issue #525) — the rest of VibeUE is unaffected. Report this to the user; do not retry. Discover exact signatures with discover_python_class('unreal.FabService'). Current methods: auth_status, list_library, get_asset, search_free_catalog, import_asset, import_free_asset, and import_status.

© kevinpbuckley, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in Content/Skills/fab of kevinpbuckley/VibeUE.

Open the folder on GitHubat commit dc051be

Compare with similar skills

Fab 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.

Fab compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Fab this skillkevinpbuckley/VibeUE730—~1.3kAutomated safety check: PassMIT
Image to Three.js Modelimg2threejs/img2threejs18k1 repos~8.2kAutomated safety check: PassApache-2.0
Web CloneJane-xiaoer/claude-skill-web-clone1k1 repos~2.7kAutomated safety check: PassMIT
Threejs Game Directormajidmanzarpour/threejs-game-skills2.5k—~2.2kAutomated safety check: PassMIT
Game Asset Generatorhtdt/godogen7.1k—~2.8kAutomated safety check: PassMIT
Threejs Gameplay Systemsvalkor-ai/loom1.2k1 repos~1.4kAutomated safety check: PassApache-2.0

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Categories

Questions about Fab

What does Fab do?

Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned…. Fab is an agent skill from kevinpbuckley/VibeUE. Search Fab's public free catalog (including Quixel Megascans) and directly import eligible assets without adding them to the account library, or discover/import the signed-in Epic account's owned Fab library.

When should I use Fab?

Fab fits situations like: free Fab/Quixel searches; owned-library questions; compatibility checks.

How do I install Fab in Claude Code?

Run `npx skills add kevinpbuckley/VibeUE --skill fab -a claude-code`. Or copy the skill folder (Content/Skills/fab in kevinpbuckley/VibeUE) into .claude/skills/fab in your project. Claude Code loads it when a task matches its description.

How do I install Fab in Codex?

Run `npx skills add kevinpbuckley/VibeUE --skill fab -a codex`. Or copy the skill folder (Content/Skills/fab in kevinpbuckley/VibeUE) into .agents/skills/fab in your project. Codex loads it when a task matches its description.

Can I use Fab 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 kevinpbuckley/VibeUE --skill fab -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fab, .gemini/skills/fab, .github/skills/fab and .opencode/skills/fab in your project.

What does Fab need to run?

SKILL.md names no scripts, command-line tools or credentials: Fab is instructions for the agent only.

Does Fab access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Fab 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 Fab use?

Fab 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 Fab use?

About 1.3k tokens (SKILL.md is roughly 5.1k 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 Fab?

Skills that share tags, products or a category with Fab: Image to Three.js Model (img2threejs/img2threejs, 18k stars), Web Clone (Jane-xiaoer/claude-skill-web-clone, 1k stars), Threejs Game Director (majidmanzarpour/threejs-game-skills, 2.5k stars) and Game Asset Generator (htdt/godogen, 7.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Fab?

kevinpbuckley (a GitHub user) maintains it in kevinpbuckley/VibeUE, which has 730 GitHub stars. The repository holds 39 skills in this directory. The repository was last updated on October 7, 2026.

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