What is bluefin-mcp copilot-instructions.md?

Project instructions for bluefin-mcp, a Go server that explains Bluefin-specific features to an AI assistant. It separates those explanations from general Linux system information handled by another server.

Use it when developing bluefin-mcp to inspect Bluefin units, ujust recipes, atomic operating-system state, package lists, and Distrobox containers, while following its Go testing and linting commands.

It prevents duplicate tools and makes clear which server owns each kind of information. It also defines the build, test, lint, installation, and verification checks required before declaring work complete.

How projectbluefin/bluefin-mcp configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to projectbluefin/bluefin-mcp. 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/projectbluefin/bluefin-mcp/main/.github/copilot-instructions.md

Clone the repo

git clone --depth 1 https://github.com/projectbluefin/bluefin-mcp

Made for: GitHub Copilot.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/projectbluefin/bluefin-mcp/copilot-instructions.svg)](https://agentmods.dev/instructions/projectbluefin/bluefin-mcp/copilot-instructions)

Your own site

<a href="https://agentmods.dev/instructions/projectbluefin/bluefin-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/projectbluefin/bluefin-mcp/copilot-instructions.svg" alt="Measured on agentmods" height="20"></a>

Per session 860 This file is loaded in full into every session.

When invoked 860 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00860	$0.00860
Opus 5	$0.00430	$0.00430
Sonnet 5	$0.00172	$0.00172
Haiku 4.5	$0.00086	$0.00086

Measured 6d ago against content hash 41988f96076a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

bluefin-mcp copilot-instructions.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 6d 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.

.github/copilot-instructions.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

bluefin-mcp — Copilot Instructions

Build & Test

just build          # go build -o bin/bluefin-mcp ./cmd/bluefin-mcp
just test           # go test -race ./...
just lint           # go vet ./... && staticcheck ./...
just install        # build + cp to ~/.local/bin/bluefin-mcp
just verify-binary  # smoke test: --version handshake

Run a single test file: go test -race ./internal/system/ -run TestGetRecipes

CI gate: go test -race ./... + go vet ./... + staticcheck ./... must all pass before any task is declared done.

What This Server Does (and Does NOT Do)

bluefin-mcp is the semantic layer for Bluefin AI assistance. It answers "what does this Bluefin-specific thing mean?" — not "what is happening on this system right now?"

Owned by bluefin-mcp	Owned by linux-mcp-server (Red Hat)
Bluefin custom unit descriptions	systemd unit status, logs, journal
ujust recipe inventory	Process list, network, storage
Atomic OS state (bootc/OCI)	CPU, memory, hardware info
Flatpak/brew package lists	Generic Linux diagnostics
Distrobox container list	—

Never add tools that duplicate linux-mcp-server. Before designing any new tool, verify it belongs to the Bluefin semantic layer, not the Linux facts layer.

Bluefin Platform Constraints — Non-Negotiable

Bluefin is not a traditional Linux desktop. These constraints are absolute:

Wayland only — X11 is completely unsupported. Never add X11 detection, references, or fallbacks.
Read-only root filesystem — no dnf, rpm, apt, or any system package manager. Package management is flatpak, brew (Linuxbrew at /home/linuxbrew/.linuxbrew), and ujust only.
Atomic OCI image — the OS is an immutable container image. Updates are bootc image pulls, not package upgrades.
Fully read-only MCP server — the only write operation permitted is store_unit_docs. Never add execute functionality.

Before adding any tool or field: verify it exists in projectbluefin/common source, ublue-os/bluefin source, or docs.projectbluefin.io. If not found there, it does not belong here.

Read the full file on GitHub · 71 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.

6d ago First seen · 71 lines · 860 tokens per session scan A 41988f96076a

Subscribe to this mod's changes

bluefin-mcp copilot-instructions.md is an instructions file published in the GitHub repository projectbluefin/bluefin-mcp (5 stars, last pushed 3d ago), licensed Apache-2.0. It adds 860 tokens to every session, about $0.0043 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 2026-08-31.

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bluefin-mcp: Instructions file for GitHub Copilot