Publishing the Same Library to npm and JSR: One Was Pleasant

Book: TypeScript in Production Also by me: The TypeScript Library — the 5-book collection My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub You take a tiny TypeScript library. Call it string-tools . A few hundred lines counting tests. You publish to both registries: npm because Node lives there, and JSR because by early 2026 it has crossed 40,000 packages and the Deno team keeps adding features the npm side has b