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Agent skill

Unreal Packaging

by ukanwat in ukanwat/overtime

Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map…

Apache-2.0Auto-check passedGame Development

Install Unreal Packaging

skills CLI
$ npx skills add ukanwat/overtime --skill unreal-packaging -a claude-code

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

GitHub CLI
$ gh skill install ukanwat/overtime unreal-packaging --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/ukanwat/overtime.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/unreal-packaging .claude/skills/unreal-packaging && 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
unreal-packaging
GitHub stars
387
Used in
1 other repo
Token cost
~1.3k tokens
SKILL.md length
518 words
Files
1
Skills in repo
21
Repo updated
First seen
Licence
Apache-2.0

At a glance

Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map…

  • Works in 3 steps: Editor packaging (the menu path) → Command-line build with UAT (CI-friendly) → Cook only (no packaging), e.g. to…
  • Packaging a build
  • SKILL.md covers When to use, Core workflow, Patterns and Pitfalls, plus 2 more sections
  • Reaches dev.epicgames.com

What it does

Unreal Packaging is an agent skill from ukanwat/overtime. Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map, and command-line builds with RunUAT BuildCookRun. Use when packaging a build, making a shipping build, cooking content, configuring packaging settings, or when the user mentions package Unreal, cook content, shipping build, or BuildCookRun.

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. Compatibility notes: Unreal Engine 5.4+; desktop/console/mobile packaging via UAT

It sits in Game Development, covering Game development. It works with Unreal Engine. The repository describes itself as: Give a coding agent a brief, not a chat, and it works on its own across sessions. Includes an example run: an open-world city built in a real game engine with no human help. In… The licence is Apache-2.0.

When your agent uses it

  • Packaging a build
  • Making a shipping build
  • Cooking content
  • Configuring packaging settings

Example prompts

  • “/unreal-packaging”

Requirements

  • Compatibility (from SKILL.md): Unreal Engine 5.4+; desktop/console/mobile packaging via UAT

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. Editor packaging (the menu path)
  2. Command-line build with UAT (CI-friendly)
  3. Cook only (no packaging), e.g. to refresh content

What it can do on your machine

Read from SKILL.md and the folder at commit eac84e0. 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 (its code samples are bash).

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

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • dev.epicgames.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.

  • Compatibility

    Unreal Engine 5.4+; desktop/console/mobile packaging via UAT

    From compatibility in the SKILL.md frontmatter.

Context cost

Unreal Packaging loads about 1.3k tokens when it runs. Until then it costs about 113 tokens; SKILL.md has 518 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~113
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 ukanwat/overtime at commit eac84e0, republished under its Apache-2.0 licence (© ukanwat). 518 words, ~1,308 tokens.

Download SKILL.mdSave it as .claude/skills/unreal-packaging/SKILL.md (or your agent's skills folder).
name
unreal-packaging
description
Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map, and command-line builds with RunUAT BuildCookRun. Use when packaging a build, making a shipping build, cooking content, configuring packaging settings, or when the user mentions package Unreal, cook content, shipping build, or BuildCookRun.
compatibility
Unreal Engine 5.4+; desktop/console/mobile packaging via UAT
license
Apache-2.0
metadata.engine
unreal
metadata.category
unreal
metadata.difficulty
intermediate

Unreal Packaging & Cooking

Turn a UE5 project into a runnable, distributable build: choose the right build configuration, cook content, set the launch map, and package — from the editor or the command line. Targets UE 5.4+.

When to use

  • Use when producing a build (test or release), choosing Development vs Shipping, cooking content, configuring Packaging / Maps & Modes settings, or automating builds with RunUAT BuildCookRun for CI.
  • Use when the project has a *.uproject and Config/Default*.ini, and the goal is a packaged player rather than running in-editor.

When not to use: storefront submission/release process → steam-publish / itch-publish. Editor-time gameplay/iteration is not packaging.

Core workflow

  1. Set the launch map. Project Settings → Maps & Modes → Game Default Map is what a packaged build loads first. Wrong/empty here is the most common "packaged game is black" cause.
  2. Pick the build configuration: Development (default; optimized but keeps logging/ stats/console for testing) vs Shipping (all optimizations, debugging tools stripped — for release). DebugGame/Debug are for debugging engine/game code and aren't for distribution; DebugGame isn't available for Blueprint-only projects.
  3. Understand cook vs package. Cooking converts assets to the target platform's format and packs them into .pak files. Packaging bundles the compiled executable + cooked content into a standalone, distributable set of files. Packaging runs a cook as part of it.
  4. Package from the editor: the Platforms menu → choose the platform (e.g. Windows) → set the Binary Configuration → Package Project → pick an output folder.
  5. Or build from the command line with the Unreal Automation Tool (RunUAT BuildCookRun) for repeatable/CI builds.
  6. Tune Packaging settings (Project Settings → Packaging): which maps/directories to cook, full-rebuild, compression, and whether to build all maps.
  7. Verify by running the packaged build, not just by a successful cook — launch the executable and confirm it loads the right map and runs.

Patterns

1. Editor packaging (the menu path)
text
Platforms (toolbar)
  -> Windows
     -> Binary Configuration -> Development | Shipping
     -> Content Management -> Package Project
  -> choose/confirm the staging output folder
Show full SKILL.md (216 more words)Show less
2. Command-line build with UAT (CI-friendly)
bash
# Cook + build + stage + pak + archive a Shipping Windows build.
RunUAT BuildCookRun \
  -project="C:/Path/MyGame.uproject" \
  -noP4 -platform=Win64 -clientconfig=Shipping \
  -cook -allmaps -build -stage -pak -archive \
  -archivedirectory="C:/Builds/MyGame"

RunUAT lives in Engine/Build/BatchFiles/ (RunUAT.bat on Windows, RunUAT.sh on macOS/Linux). Drop -allmaps and pass -map=Map1+Map2 to cook a subset.

3. Cook only (no packaging), e.g. to refresh content
bash
RunUAT BuildCookRun -project="C:/Path/MyGame.uproject" -noP4 \
  -platform=Win64 -clientconfig=Development -cook -skipstage

Pitfalls

  • Packaged build loads a black/empty level — Game Default Map isn't set (or that map wasn't cooked). Set it in Maps & Modes and ensure it's included in the cook.
  • Shipping a Development build — Development keeps logging/console/stats and is slower; ship Shipping. Conversely, Shipping strips UE_LOG/console, so debugging a Shipping-only issue needs Development or Test.
  • A referenced map/asset is missing at runtime — it wasn't cooked. Add it to the Packaging settings' maps/directories to cook, or cook all maps.
  • Build fails on the platform — the platform SDK/toolchain isn't installed (Windows build tools, Android SDK/NDK, console SDKs). Install the platform's prerequisites.
  • Expecting Blueprint Nativization — it was removed in UE5; don't rely on it for performance. Profile and move hot logic to C++ (unreal-cpp-gameplay) instead.
  • First cook is very slow — shaders and all assets cook from scratch; subsequent cooks are incremental. Don't mistake a slow first cook for a hang.

References

  • Primary docs: "Packaging Your Project" (https://dev.epicgames.com/documentation/en-us/unreal-engine/packaging-your-project) and the Build Configurations / BuildCookRun references.
  • steam-publish / itch-publish — distributing the packaged build to a storefront.
  • unreal-cpp-gameplay — moving hot logic to C++ now that BP nativization is gone.

© ukanwat, Apache-2.0. 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 .claude/skills/unreal-packaging of ukanwat/overtime.

Open the folder on GitHubat commit eac84e0

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in ukanwat/overtime, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Unreal Packaging 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.

Unreal Packaging compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Unreal Packaging this skillukanwat/overtime3871 repos~1.3kAutomated safety check: PassApache-2.0
Unreal BridgeTornLux/UnrealBridge306—~8.4kAutomated safety check: NotesMIT
Unreal Blueprint Authoringflopperam/unreal-engine-mcp1.1k—~1.6kAutomated safety check: PassNone
UMG Material MCPwinyunq/UnrealMotionGraphicsMCP210—~913Automated safety check: PassMIT
Unreal Animation Bone Editorkevinpbuckley/VibeUE730—~1.3kAutomated safety check: PassMIT
Unreal Engine MCPEpicGames/unreal-engine-skills-for-claude-code-plugin338—~1.8kAutomated safety check: PassMIT

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Works with

Categories

Questions about Unreal Packaging

What does Unreal Packaging do?

Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map…. Unreal Packaging is an agent skill from ukanwat/overtime. Package and ship an Unreal Engine 5 project: the Platforms menu Package Project flow, build configurations (Development vs Shipping), cooking content, packaging settings and the Game Default Map, and command-line builds with RunUAT BuildCookRun.

When should I use Unreal Packaging?

Unreal Packaging fits situations like: packaging a build; making a shipping build; cooking content; configuring packaging settings.

How do I install Unreal Packaging in Claude Code?

Run `npx skills add ukanwat/overtime --skill unreal-packaging -a claude-code`. Or copy the skill folder (.claude/skills/unreal-packaging in ukanwat/overtime) into .claude/skills/unreal-packaging in your project. Claude Code loads it when a task matches its description.

How do I install Unreal Packaging in Codex?

Run `npx skills add ukanwat/overtime --skill unreal-packaging -a codex`. Or copy the skill folder (.claude/skills/unreal-packaging in ukanwat/overtime) into .agents/skills/unreal-packaging in your project. Codex loads it when a task matches its description.

Can I use Unreal Packaging 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 ukanwat/overtime --skill unreal-packaging -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/unreal-packaging, .gemini/skills/unreal-packaging, .github/skills/unreal-packaging and .opencode/skills/unreal-packaging in your project.

What does Unreal Packaging need to run?

SKILL.md names no scripts, command-line tools or credentials: Unreal Packaging is instructions for the agent only. Compatibility (from SKILL.md): Unreal Engine 5.4+; desktop/console/mobile packaging via UAT.

Does Unreal Packaging access the network?

SKILL.md names 1 domain. In commands or code: dev.epicgames.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Unreal Packaging 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 Unreal Packaging use?

Unreal Packaging is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Unreal Packaging use?

About 1.3k tokens (SKILL.md is roughly 5.2k 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 Unreal Packaging?

Skills that share tags, products or a category with Unreal Packaging: Unreal Bridge (TornLux/UnrealBridge, 306 stars), Unreal Blueprint Authoring (flopperam/unreal-engine-mcp, 1.1k stars), UMG Material MCP (winyunq/UnrealMotionGraphicsMCP, 210 stars) and Unreal Animation Bone Editor (kevinpbuckley/VibeUE, 730 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Unreal Packaging?

ukanwat (a GitHub user) maintains it in ukanwat/overtime, which has 387 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 8, 2026.

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