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tierney cyren
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tierney cyren

@bnb.im
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developer advocate. girl rave dj. nyc. they/them. queer. poly. adhd. 1312. one of the organizers of @atproto.nyc, threw up @upvote.at + @atmo.sh. currently: let’s talk past: @recurse.com, @twilio.com, @azure.microsoft.com, NodeSource

Tierney Cyren
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
postatprotocol
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!
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meetupnyc
Tierney Cyren
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.
postjavascript
Tierney Cyren
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.
post
Tierney Cyren
Tierney CyrenJun 16, 2021
Explicit ESM in Node.js with .mjs
A brief explainer on the usage of .mjs and .cjs in Node.js.
postnode
Tierney Cyren
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).
postnode
Tierney Cyren
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.
postbeginners
Tierney Cyren
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.
postjavascript
Tierney Cyren
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.
postjavascript
Tierney Cyren
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.
postjavascript
Tierney Cyren
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.
postjavascript
Tierney Cyren
Tierney CyrenApr 25, 2019
The Awesome Features that Just Landed with Node.js v12
Node.js v12.0.0 just shipped! Let's take a look at what's new.
postnode