Lexicon: A Prompt Library for macOS

Wed, 01 Jul 2026 00:00:00 +0000

I wrote about building a prompt library with MCP back in October. At the time, Lexicon was a side project I’d been hacking on to scratch an itch: I had too many prompts scattered across too many places. Some lived in my head, some in a notes file, some in old chat histories I’d never find again.

Since then I’ve been using it daily, and it just shipped to the Mac App Store. Here’s what it turned into.

Lexicon on McGinnis, Will

Lexicon: A Prompt Library for macOS