PrmptMD

PrmptMD file format — .NET parsing library & VS Code extension.

Structure

src/Zionet.Prompting/    # .NET NuGet library for parsing .prmpt.md files
vscode-extension/prmptmd-vscode/ # VS Code extension for syntax highlighting & diagnostics
schema/                          # Shared PrmptMD JSON schema

Components

Zionet.Prompting (NuGet)

A .NET library that provides:

• File-based prompt loading and resolution
• YAML frontmatter parsing and validation
• Chat body parsing (system/user/assistant/developer roles)
• Mustache-style variable extraction and rendering
• JSON Schema validation for .prmpt.md files

PrmptMD VS Code Extension

A VS Code extension that provides:

• Syntax highlighting for .prmpt.md files
• Inline diagnostics for invalid frontmatter and body structure
• Language configuration (comments, brackets, etc.)

Getting Started

NuGet Package

dotnet add package Zionet.Prompting

VS Code Extension

cd vscode-extension/prmptmd-vscode
npm install
npm run package
npm run install-local