Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Italink/UnrealClientProtocol --skill unreal-client-protocolgit clone --depth 1 https://github.com/Italink/UnrealClientProtocolWrote 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.
[](https://agentmods.dev/skills/italink/unrealclientprotocol/unreal-client-protocol)<a href="https://agentmods.dev/skills/italink/unrealclientprotocol/unreal-client-protocol"><img src="https://agentmods.dev/badge/skills/italink/unrealclientprotocol/unreal-client-protocol.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.01624 |
| Opus 5 | $0.00030 | $0.00812 |
| Sonnet 5 | $0.00012 | $0.00325 |
| Haiku 4.5 | $0.00006 | $0.00162 |
Grade A, and why
unreal-client-protocol 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UnrealClientProtocol
Communicate with a running UE editor through the UnrealClientProtocol TCP plugin. UCP exposes a single command — call any UFunction on any UObject via JSON. All functionality is provided through Blueprint Function Libraries that you invoke this way.
Invocation
When you read this SKILL.md, you already know its absolute path. Replace the filename with scripts/UCP.py to get UCP.py's path. For example, if this file is at X/Skills/unreal-client-protocol/SKILL.md, then UCP.py is at X/Skills/unreal-client-protocol/scripts/UCP.py. Do NOT search or glob for UCP.py.
Use PowerShell here-string (@'...'@) to pipe JSON into UCP.py. This avoids all quote/escape issues:
@'
{"object":"/Script/UnrealClientProtocol.Default__ObjectOperationLibrary","function":"FindObjectInstances","params":{"ClassName":"/Script/Engine.World"}}
'@ | python "<path-to-UCP.py>"
IMPORTANT: The @' must be on its own line, and '@ must also be at the start of its own line. This is PowerShell here-string syntax — the content between them is passed verbatim with zero escaping needed.
NEVER use echo '...' or echo "..." for JSON in PowerShell — quotes and braces will be corrupted.
Command Format
{"object":"<object_path>","function":"<func_name>","params":{...}}
object: Full UObject path — use CDO path for static/library functions, instance path for member methods.function: The UFunction name exactly as declared in C++.params: (optional) Map of parameter name -> value. UObject* params accept path strings. OmitWorldContextObject.
Parameter handling
- Out parameters (
TArray<AActor*>& OutActors, etc.) can be omitted fromparams— they are auto-initialized and returned as part of the result after execution. - Return values and all out parameters are serialized together in the response. For example, calling
GetAllActorsOfClasswith only{"ActorClass":"/Script/Engine.StaticMeshActor"}returns{"OutActors":["/Game/Maps/Main.Main:PersistentLevel.Cube_0", ...]}. - UObject* parameters accept full object paths as strings. The system resolves them automatically.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 7d ago First seen · 96 lines · 60 tokens per session scan A 3675ba1d3165
unreal-client-protocol is a skill published in the GitHub repository Italink/UnrealClientProtocol (125 stars, last pushed 9d ago), licensed MIT. It adds 60 tokens to every session and 1,624 once invoked, about $0.0003 per session on Opus 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.
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