Mark Phelps

Latest · AI agents in practice · 20 Sep 2026 · 6 min

Giving my AI agents access to my RSS reader

How I turned Cove, the Mac RSS reader I built, into an MCP server so my AI agents send me a daily digest in Discord while my library stays on my Mac.

Also recent

All writing

Building an LLM-powered code review sidebar

How I built Sherpa, a Chrome extension that uses LLMs to explain pull requests as you review them, with progressive file and hunk-level detail.

Building on the side

Running AI agents in devcontainers

How to use devcontainers to run AI agents like Claude Code and Codex in isolated environments you control, so you can skip the permission prompts.

AI agents in practice

Still shipping. Now with agents.

I'm a principal engineer working out how AI agents change the job, and building my own software on the side. These are the field notes.

I work on the AI infrastructure team at Cloudflare. Before that I ran my own startup, Flipt, and before that I helped build GitHub Container Registry.

Things I make

All projects

Beta

Cove

A native Mac RSS reader that keeps the full article, and lets your agents read it too.

On sale

Vigil

Keeps your Mac awake while your coding agents work.

The letter

New essays by email. It costs nothing.