Ready to supercharge your AI agents?

Install any skill in seconds. Free to start, no credit card required.

Unreal Development Skill · a5c-ai | DecimalAI

codingby a5c-ai

Unreal Development Skill

a5c-ai/unreal-development

Source a5c-ai/babysitter ↗License MIT

Unreal Engine integration skill for C++/Blueprint development, actor lifecycle management, plugin development, and editor automation. Enables LLMs to interact with Unreal Editor through MCP servers for level manipulation, Blueprint generation, and automated workflows.

SkillScore87Maintained

Automatic

Coding pack

Last verified 8/29/2026

What it changes

Passed 20 of 23 test cases with the skill, and 13 of 23 without it.

Without skill57%

With skill87%

Checks it passed that the model alone missed

Specifies UNREAL_PROJECT_PATH in the environment variable section
Specifies unreal_spawn_actor as the tool name for level actor placement
Includes the module API export macro MYGAME_API in the class declaration

and 7 more in the full report

7 fixed13 passed either way3 still failing0 broke

Pass-rate lift: +30 pp
Tokens: +130%
Agent turns: 0%
Response time: -10%

Model gemini-3.6-flashMeasured 8/29/2026v120 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/a5c-ai-unreal-development/SKILL.md https://app.decimal.ai/s/a5c-ai-unreal-development/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add a5c-ai-unreal-development, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/a5c-ai-unreal-development/ and pins it in .decimal/skills.lock

decimalai skills add a5c-ai-unreal-development

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/a5c-ai-unreal-development/SKILL.md https://app.decimal.ai/s/a5c-ai-unreal-development/SKILL.md

Raw file: /s/a5c-ai-unreal-development/SKILL.md ↗ · machine-readable summary at /s/a5c-ai-unreal-development.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

I need an MCP tool command that inspects and queries the hierarchy and actor contents of the currently active editor level. What is the tool name?

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies unreal_query_level as the tool for inspecting active level structure	Missed	Passed

case-20 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md397 linessingle file

Unreal Development Skill

Comprehensive Unreal Engine development integration for AI-assisted game creation, editor automation, and project management.

Overview

This skill provides capabilities for interacting with Unreal Engine projects, including C++ development, Blueprint visual scripting, actor management, and build automation. It leverages the Unreal MCP ecosystem for direct editor integration when available.

Capabilities

Project Management

Create and configure Unreal projects
Manage project settings (Project Settings, DefaultEngine.ini, etc.)
Configure plugin dependencies
Set up module structure for code organization

C++ Development

Generate Actor and Component classes with proper UCLASS macros
Create UObject subclasses with reflection support
Implement interfaces (UInterface)
Write custom Editor modules
Generate unit tests using Automation Framework

Blueprint Visual Scripting

Generate Blueprint classes from specifications
Create Blueprint function libraries
Design Blueprint interfaces
Build reusable Blueprint macros
Generate data-only Blueprints

Actor and Component System

Create and modify Actors programmatically
Design component hierarchies
Implement tick and lifecycle management
Set up actor replication for multiplayer

Level Design

Create and modify levels
Place actors and configure properties
Set up level streaming

Track record

Benchmark

20 / 23

test cases passed, vs 13 / 23 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

a5c-ai / babysitter

library/specializations/game-development/skills/unreal-development/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

a5c-ai/unity-developmentUnity Engine integration skill for project setup, C# scripting, scene management, prefab creation, and editor automation. Enables LLMs to interact with Unity Editor through MCP servers for asset manipulation, script generation, and automated workflows.Close match+26 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Unreal Development Skill

Overview

Capabilities

Project Management

C++ Development

Blueprint Visual Scripting

Actor and Component System

Level Design

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills