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tierney cyren

@bnb.im

girl rave dj. they/them. queer. poly. adhd. 1312. nyc. organizer @atproto.nyc, threw up @upvote.at + @atmo.sh. maintainer @nodejs.org, @electronjs.org, @npmx.dev

Posts

15

Publications

2

Subscriptions

7

Readers

1

Tierney CyrenOct 2, 2026

What is the Atmosphere: An Untech Introduction

An introduction to the ecosystem that a lot of people care about and all trying to figure out how to communicate effectively. Maybe this will help a bit.

Tierney CyrenAug 25, 2026

Essential Resources for Getting Started with AT Protocol

A set of critical links for anyone interested in getting started with AT Protocol and exploring the landscape

atproto.nyc

atproto.nycJul 25, 2026

atproto.nyc community day 2026

Join us on Saturday, Aug 22nd at the Recurse Center in Brooklyn to learn, hack, and build with the AT Protocol!

Tierney CyrenOct 30, 2025

is-mdm: MDM detection in Node.js

A quick post about is-mdm, a package I wrote to detect MDM enrollment that was inspired by a Rust implementation found on Lobste.rs from LGUG2Z.

Tierney CyrenJun 17, 2021

Conditional Exports: Supporting both import and require()

On conditional exports and enabling end-users to use both import and require() with your module.

Tierney CyrenJun 16, 2021

Explicit ESM in Node.js with .mjs

A brief explainer on the usage of .mjs and .cjs in Node.js.

Tierney CyrenJun 16, 2021

Implicit ESM in Node.js with "type": "module"

A brief article on the usage of "type": "module" in package.json to have .js files parsed as ECMAScript Modules (ESM).

Tierney CyrenMay 5, 2021

Markdown Link Checking in GitHub with Actions

If you maintain any repo for a sufficient amount of time, you'll end up finding that various Markdown links will eventually break. With GitHub Actions you can address this challenge with ease.

Tierney CyrenApr 2, 2021

The New npm diff Command

In a recent release, the npm CLI shipped a new command - npm diff - that's extremely useful for inspecting Node.js and JavaScript modules published to the npm registry. This is a relatively detailed primer on that command.

Tierney CyrenOct 2, 2020

Securely Automating npm publish with the New npm Automation Tokens

Today, npm announced automation tokens. Let's go over what automation tokens are, what they're useful for, and how to use them.

Tierney CyrenApr 9, 2020

Jest and the `--changedSince` flag in GitHub Actions CI

Today I worked through getting Jest's `--changedSince` flag working on GitHub Actions CI. Let's dig into why, what happened, and how each of the moving parts work in a way that's seemingly not documented anywhere else.

Tierney CyrenOct 2, 2019

An Unintentionally Comprehensive Introduction to GitHub Actions CI

I recently started working on some templates for GitHub Actions CI that Node.js and JavaScript folks could simply copy/paste to instantly get cross-platform CI builds for free inside of GitHub. In this post, we go over those templates and walk line-by-line over one of them to better understand the composition of a GitHub Action CI template.