---
title: "open-uefn-kit"
description: "A small, evidence-first agent kit for building and playtesting UEFN + Verse vertical slices with GitHub Copilot and Unreal MCP."
canonical: https://agentpluginsdirectory.com/plugins/open-uefn-kit
last-updated: 2026-10-21
---

# open-uefn-kit
A small, evidence-first agent kit for building and playtesting UEFN + Verse vertical slices with GitHub Copilot and Unreal MCP.
- Slug: open-uefn-kit
- Publisher: Open UEFN Kit Contributors
- Repository: https://github.com/RCSnyder/open-uefn-kit
- Manifest: plugin.json
- Version: 0.1.0
- License: MIT
- Category (editorial): creative-media
- Skills: 6 (uefn-mcp, uefn-playtest-feedback, uefn-runtime-proof, uefn-setup, uefn-slice, uefn-verse)
- MCP servers: 1 (unreal-mcp)
- Stars: 0
- Repository created: 2026-08-30
- Repository last pushed: 2026-09-01
- Publisher type: User
- Listing: https://agentpluginsdirectory.com/plugins/open-uefn-kit
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What open-uefn-kit does, in the publisher's words

Describe → Slice → Build → Prove → Play → Learn.

Open UEFN Kit is an agent plugin for building small, complete UEFN + Verse gameplay slices.

It is for creators who want the AI to do more of the implementation work without turning the project into spaghetti.

- GitHub Copilot custom agents
- Agent Skills
- Epic's Unreal MCP in UEFN
- a separate machine-verification pass
- short human playtests for game feel
- Enable Python Editor Scripting.

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/RCSnyder/open-uefn-kit/HEAD/README.md

## Skills

- uefn-mcp: Use UEFN's current Unreal MCP toolsets safely and efficiently. Use whenever an agent needs to inspect or modify the UEFN editor, Scene Graph, Creative devices, Verse, compilation, or play-session state.
- uefn-playtest-feedback: Convert short human UEFN playtest feedback into one falsifiable gameplay hypothesis and the next tiny vertical slice. Use after the user reports what they noticed, felt, misunderstood, or disliked.
- uefn-runtime-proof: Verify a UEFN gameplay slice with compile, session, runtime, and log evidence while clearly separating machine-provable behavior from human playtest judgment.
- uefn-setup: Set up or repair the connection between UEFN and an MCP-compatible coding agent. Use when Unreal MCP is missing, disconnected, on a custom port, or the user is starting Open UEFN Kit for the first time.
- uefn-slice: Convert a loose Fortnite/UEFN gameplay request into one tiny vertical slice with explicit acceptance criteria and scope boundaries. Use before implementation when a request contains multiple ideas, vibe language, or unclear completion conditions.
- uefn-verse: Implement maintainable Verse for a small UEFN gameplay slice. Use when a device-only solution is insufficient or existing Verse must change.

Descriptions come from the frontmatter of each SKILL.md, punctuation lightly normalized.

## MCP servers

- unreal-mcp: transport: streamable-http; url: http://127.0.0.1:8000/mcp

Read from the plugin's own mcp.json. Environment variable names only, never values.