mdm
A CLI (command line interface) for managing markdown files and agent instructions: rule sync, skills management, health auditing, and project scaffolding. No telemetry, fully open source.
Go · CLI
Seth Carney · Full Stack Software Engineer
I build software, create open-source tools, and document what I learn.
Projects, open-source contributions, and notes from the work, collected in one place.
About
I'm Seth, a full stack software engineer. My journey into programming began with a curiosity for how websites worked, which turned into a career spent crafting high-quality code and interfaces people enjoy using.
I work with modern web technologies on the front end and have strong back-end expertise in Java and C#. I like taking ideas from concept to deployment, scalable enterprise systems and small elegant interfaces alike, and I lean on AI-assisted development with GitHub Copilot and Claude Code to move faster.
Languages
- JavaScript
- TypeScript
- Java
- C#
- Kotlin
- SwiftUI
- Python
Tools
- React & Next.js
- Node.js
- Bun
- GitHub Copilot
- Claude Code
- Godot
Selected work
All projects →storybook-addon-profiler
A performance profiler panel addon for Storybook with real-time FPS, INP, CLS, memory, and more. Works with every Storybook framework.
TypeScript · Storybook · Web Vitals · Performance API
eslint-plugin-mvvm
An ESLint plugin that enforces MVVM architectural layer boundaries in React codebases, keeping data flowing one way from Model to ViewModel to View.
TypeScript · ESLint · React · Bun
mdm extension
The companion Visual Studio Code extension for the mdm CLI. A sidebar panel for managing markdown driven Skills, Agents, and Rules without leaving the editor.
TypeScript · VS Code Extension API · Bun · mdm CLI
Next.js Link Preview
A simple, lightweight Next.js component for displaying beautiful link preview cards. Pure presentational - bring your own data!
React · Next.js · TypeScript
Storybook Previewer Extension
A Visual Studio Code extension that provides a live preview of Storybook stories directly within the editor.
TypeScript · VS Code Extension API · Storybook · WebView API