Since I started using a monorepo for all my work stuff my productivity and "let's just give it a go"-ishness has gone through the roof. So cool to have a single spot where I can copy-paste something close enough and just get hacking.

Effect 3.5.0 has been released! → Better support for Error.cause → effect/sql-d1 release → Added RcRef & RcMap → Added Logger.pretty → PubSub replay option and more: effect.website/blog/effect-3.5

Typescript-only pattern for full type-safety: constant list + record keys 👉 `as const` to extract values from list as type 👉 `Record` key using elements in the list This *requires* you to add the key to the record if you add a new value to the list

Typescript wizardy: `as const` + `satisfies` Combine both to have type safety on Record keys and values + constant inferred types You can then extract both keys and values as unions using `keyof` and `typeof` 🧙

Keep your dependencies up to date, even more than up This week on the newsletter 👉 React 19 (rc) 👉 NextJs 15 (rc) 👉 Tailwindcss v4 (alpha) 👉 Effect | TypeScript at Scale How I built a new platform for my courses

After 4 yrs of work: mmm.page 1.0 is live! Dead simple, drag-&-drop websites. Add text, images, shapes, GIFs, videos, code — even draw. It's your internet canvas.

React 19 is huge. Here's a cheat sheet. Nine new features: 1. React Server Components - Components that render at build time, or for each request. 2. Actions - Functions that use async transitions and automatically submit data for you. Actions support error handling,

𝗛𝗼𝘄 𝘁𝗼 𝗱𝗼 𝗺𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗽𝗿𝗼𝗽𝗲𝗿𝗹𝘆? 𝗦𝗲𝗹𝗳-𝗰𝗼𝗻𝘁𝗮𝗶𝗻𝗲𝗱 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 (𝗦𝗖𝗦) is a software architecture approach that prioritizes the decentralization of applications into independent systems, each with its domain

I'm loving neverthrow. Type-safe error handling in TypeScript without the bullshit. Let me show you how it works 🧵

🏋️ I made a Deadlift ETF with only companies with CEOs that lift weights or do fight sports (not just cardio) It outperforms the S&P500 by 140% or 2.4x over the last 4 years! Lifting weights = $$$

This small script has saved me hours of internally debating with myself what to name my branch

A few months ago, we changed the way we address bugs Linear. We prioritized bugs over everything else. If you have bugs assigned when you wake up in the morning, you don't do anything else before they are addressed. This approach felt scary and quite radical, but our theory was

Narrowing down the types of values is key knowledge for any TypeScript dev. Here's 11 different ways you can do it. I bet you won't know 2 or 3 of them! 🧵

Last month Google quietly introduced "first-party mode" for Google Tag Manager. 👉 developers.google.com/tag-platform/t… First-party mode lets you deploy a Google tag using your own website domain. The main benefit that your website analytics won't get blocked anymore. This means you finally

10 months ago, I created a System Design repo on Github, and I'm excited to share that it recently reached over 15,000 stars. Thanks to everyone who has starred or forked this repository! The repository contains a collection of resources to study: - System Design concepts and

wrote a step by step guide on how to set up a Hetzner VM for self-hosting (from $4/mo 🔥) so you can skip the serverless tax did I miss something? 🤔 I went for the most minimalistic setup while still having the basis so anyone could follow along. Also, I did this while on the

Here's how I usually structure my Next/React apps. Let's talk about styling, data fetching, UI libraries, settings, and more. Styling The short story is Tailwind. Why? It was easy for me to pick up, stays consistent whenever I revisit old projects, and works great with AI /

I have seen this mistake in production. The Dual Write Problem is not a myth. Two solutions deal with it. The Dual Write Problem happens when two or more operations need to be “consistent”, but across different systems or databases. A typical example would be writing to your

13 key sections for a high-converting Product page:

my favorite JavaScript API is `Proxy` – it allows you to "spy" on any object property