What is proton-safe-mcp mermaid.instructions.md?

A set of instructions for creating and editing Mermaid diagrams, which are text-based diagrams generated from simple descriptions. It covers writing diagram files, checking their syntax, and previewing them in Visual Studio Code.

It helps create, edit, validate, and preview Mermaid diagrams in a coding project. It is intended for diagram work in Visual Studio Code.

It gives an agent a defined process for producing diagrams and catching malformed Mermaid code before showing it. It also identifies the tools used to validate and preview the result.

How fbossiere/proton-safe-mcp configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to fbossiere/proton-safe-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/fbossiere/proton-safe-mcp/main/.github/instructions/mermaid.instructions.md

Clone the repo

git clone --depth 1 https://github.com/fbossiere/proton-safe-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/fbossiere/proton-safe-mcp/mermaid/github.svg)](https://agentmods.dev/instructions/fbossiere/proton-safe-mcp/mermaid)

Your own site

<a href="https://agentmods.dev/instructions/fbossiere/proton-safe-mcp/mermaid"><img src="https://agentmods.dev/badge/instructions/fbossiere/proton-safe-mcp/mermaid/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/fbossiere/proton-safe-mcp/mermaid"><img src="https://agentmods.dev/badge/instructions/fbossiere/proton-safe-mcp/mermaid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 970 This file is loaded in full into every session.

When invoked 970 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.

Model	Per session	Once invoked
Fable 5.1	$0.00970	$0.00970
Opus 5	$0.00485	$0.00485
Sonnet 5	$0.00194	$0.00194
Haiku 4.5	$0.00097	$0.00097

Measured 5d ago against content hash 6a91984bb661, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

proton-safe-mcp mermaid.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 5d 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.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

coding mermaid.instructions.md — 100% identical, 0 lines differ
gitea-mcp mermaid.instructions.md — 100% identical, 0 lines differ
Project-AMBER mermaid.instructions.md — 100% identical, 0 lines differ

.github/instructions/mermaid.instructions.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mermaid AI Skills

When the user asks to create, edit, or visualize any diagram, use the Mermaid VS Code extension tools and commands described below.

Workflow

Determine the diagram type and generate Mermaid syntax.
Write the diagram to a .mmd file in the project.
Validate syntax: correct first-line keyword, arrow types, balanced brackets.
Preview via the Mermaid extension — open the .mmd file (auto-preview) or run MermaidChart: Preview Diagram (mermaidChart.preview).

LM Tools — call these for every diagram interaction

mermaid-diagram-validator — validate Mermaid syntax before presenting any diagram
mermaid-diagram-preview — render a live preview inside VS Code after generating
get-syntax-docs-mermaid — fetch correct syntax docs for any diagram type

VS Code Commands

Invoke via Command Palette or the VS Code command API (GitHub Copilot in VS Code only). Do not invent command IDs. Prefer writing/editing .mmd files when a command is not needed.

Diagram editing & preview

Preview (mermaidChart.preview) — preview the active Mermaid editor (.mmd / .mermaid must be open).
Create Diagram (mermaidChart.createMermaidFile) — creates a demo flowchart and opens preview side by side.
Repair Diagram (mermaidChart.repairDiagram) — Mermaid AI repair for the active diagram; uses Mermaid AI credits — tell the user before running.
Improve Diagram (mermaidChart.improveDiagram) — uses Copilot / LM API; suggests layout + styling variants for the active diagram.

Generate diagrams (GitHub Copilot required)

Generate Diagram from Code (mermaidChart.generateDiagramFromCode)
Generate Cloud Diagram (mermaidChart.generateCloudDiagram)
Generate ER Diagram (mermaidChart.generateERDiagram)
Generate Docker Diagram (mermaidChart.generateDockerDiagram)
Open AI Chat (mermaidChart.openCopilotChat)

Mermaid Chart cloud

Login (mermaidChart.login) / Logout (mermaidChart.logout)
Connect Diagram (mermaidChart.connectDiagramToMermaidChart) — link a local diagram to Mermaid Chart.
Sync Diagram (mermaidChart.syncDiagramWithMermaid) — only for diagrams already connected (frontmatter has id:). Example:
```
---
id: cbd9e9ba-a2cb-47c5-a98e-8c28a753428d
---
```

Read the full file on GitHub · 86 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.

5d ago First seen · 86 lines · 970 tokens per session scan A 6a91984bb661

Subscribe to this mod's changes

proton-safe-mcp mermaid.instructions.md is an instructions file published in the GitHub repository fbossiere/proton-safe-mcp (3 stars, last pushed 2d ago), licensed MIT. It adds 970 tokens to every session, about $0.0049 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 2026-09-04.

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proton-safe-mcp: Instructions file for GitHub Copilot