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UEMCP: Instructions file for Codex

AGENTS.md

UEMCP AGENTS.md is an instructions file for Codex, OpenCode from atomantic/UEMCP. It costs 767 tokens per session, scanned A, original, MIT.

Project-specific instructions for UEMCP, a bridge between AI assistants and Unreal Engine development tools.

In plain words
What is it for?
Use them when building, testing, running, or modifying the TypeScript server, Unreal Engine plugin, integration tests, or supporting scripts.
Why use it?
They give an agent the repository layout, setup commands, coding rules, and tests it must follow when changing the project.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md.

This is atomantic/UEMCP's own configuration. It tells Codex and OpenCode how to work on UEMCP itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything UEMCP configures →

not rated 20repo 7d ago A scan 767 tokens original MIT
View source ↗ atomantic/UEMCP
Reuse

Borrowing it

Nothing to install: this file belongs to atomantic/UEMCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/atomantic/UEMCP/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/atomantic/UEMCP

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/atomantic/uemcp/agents-md"><img src="https://agentmods.dev/badge/instructions/atomantic/uemcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for UEMCP AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/atomantic/uemcp/agents-md"><img src="https://agentmods.dev/badge/instructions/atomantic/uemcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 767 This file is loaded in full into every session.
When invoked 767 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00767 $0.00767
Opus 5.5 $0.00307 $0.00307
Sonnet 5.5 $0.00153 $0.00153
Haiku 4.5 $0.00077 $0.00077

Measured 1mo ago against content hash e48808df9106, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

UEMCP AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guidelines

Project Structure & Modules

  • server/: TypeScript MCP server (src, tests, dist). Build, lint, typecheck live here.
  • plugin/: Unreal Engine plugin (Python ops, C++ stub, uplugin). Python lives under plugin/Content/Python.
  • tests/: Integration/E2E helpers and scenarios; Python test example under tests/python.
  • scripts/: Local diagnostics and utilities (e.g., mcp-diagnostic.js, bump-version.js).
  • docs/, README.md, CLAUDE.md: Architecture, workflows, contributor info.

Build, Test, Run

  • Install/setup: ./setup.sh (detects Node, builds server, configures MCP clients).
  • Dev server: npm run dev (from repo root; runs server in watch mode).
  • Build: npm run build (invokes tsc in server).
  • Tests (root):
    • npm test or npm run test:e2e — E2E suite.
    • npm run test:unit — Jest unit tests in server.
    • npm run test:integration — Integration checks.
    • cd server && npm run test:python — Python plugin tests via pytest.
    • CI-like run: ./test-ci-locally.sh.

Coding Style & Naming

  • Indentation: JS/TS/JSON 2 spaces; Python 4 spaces (.editorconfig).
  • TypeScript: ESLint + strict rules (server/.eslintrc.js): no any, explicit returns, no unused vars, no floating promises. Run npm run lint and npm run lint:fix.
  • Filenames: kebab- or lowerCamel for TS files; Python modules snake_case under plugin/Content/Python.
  • Public tool exports live in server/src/tools and are registered via server/src/index.ts.
  • Error handling: Avoid try/catch (TS) and try/except (Py) whenever possible. Prefer validation + specific errors and the UEMCP framework decorators/utilities. See docs/development/error-handling-philosophy.md, docs/improved-error-handling.md, and docs/development/code-standards.md.
  • Linting standard: Zero warnings and zero errors. TS: cd server && npm run lint. Python: flake8 in plugin/Content/Python with --max-line-length=120. Do not merge code with any lint output.

Read the full file on GitHub · 42 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 42 lines · 767 tokens per session scan A e48808df9106

Subscribe to this mod's changes

UEMCP AGENTS.md is an instructions file published in the GitHub repository atomantic/UEMCP (20 stars, last pushed 7d ago), licensed MIT. It adds 767 tokens to every session, about $0.0031 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Codemcp-serverunreal-engine
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