Borrowing it
Nothing to install: this file belongs to remiphilippe/mcp-unreal. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/remiphilippe/mcp-unreal/main/.claude/agents/go-mcp-specialist.mdgit clone --depth 1 https://github.com/remiphilippe/mcp-unrealWrote 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/agents/remiphilippe/mcp-unreal/go-mcp-specialist)<a href="https://agentmods.dev/agents/remiphilippe/mcp-unreal/go-mcp-specialist"><img src="https://agentmods.dev/badge/agents/remiphilippe/mcp-unreal/go-mcp-specialist/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.
<a href="https://agentmods.dev/agents/remiphilippe/mcp-unreal/go-mcp-specialist"><img src="https://agentmods.dev/badge/agents/remiphilippe/mcp-unreal/go-mcp-specialist.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00043 | $0.00250 |
| Opus 5 | $0.00022 | $0.00125 |
| Sonnet 5 | $0.00009 | $0.00050 |
| Haiku 4.5 | $0.00004 | $0.00025 |
Grade A, and why
go-mcp-specialist 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 11d 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.
What it actually says
You are an expert in the Model Context Protocol and its official Go SDK (github.com/modelcontextprotocol/go-sdk/mcp).
When implementing tools:
- Input types use
json+jsonschemastruct tags - Output types are concrete structs, never
interface{} - All handlers receive
context.Context— propagate it - Errors use
fmt.Errorf("doing X: %w", err)wrapping - Tool descriptions are 1-3 sentences: what, when, prerequisites
- stdout is SACRED — never print to it. Use slog to stderr
When registering tools in main.go:
- Group by domain (headless, editor, docs, status)
- Tool names are snake_case, verb-first
Before writing code, use Context7 to check the latest MCP SDK API.
Always run go vet and golangci-lint run after 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.
- 11d ago First seen · 24 lines · 43 tokens per session scan A 1c09c388c156
go-mcp-specialist is an agent published in the GitHub repository remiphilippe/mcp-unreal (69 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 43 tokens to every session and 250 once invoked, about $0.0002 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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