Mark Phelps

Writing

2026

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.

AI agents in practice · 6 min

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 · 4 min

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 · 5 min

The letter

New essays by email. It costs nothing.