TypeScript Coffee

Observability at Scale: Mastering ADK Callbacks for Cost, Latency, and Auditability [GDE]

AI orchestrators receive significant attention; however, when deployments become latent and costly,... Read More

OpenTelemetry just standardized LLM tracing. Here's what it actually looks like in code.

Every LLM tool invents its own tracing format. Langfuse has one. Helicone has one. Arize has one. If... Read More

DotShare v3.0 — I Turned My VS Code Extension Into a Full Publishing Suite (Dev.to + Medium Inside)

A deep technical dive into DotShare v3.0 — the Publishing Suite update that added Dev.to... Read More

I open-sourced salt-theme-gen

I open-sourced salt-theme-gen — a zero-dependency OKLCH theme generator for JS/TS Theming often... Read More

Run Away From Work — Stopped Using React for the Game Loop

Play the game here 👈 Hi there! I’m @nyaomaru, a frontend engineer who got Resident Evil 9 from... Read More

I Built a Voice AI with Sub-500ms Latency. Here's the Echo Cancellation Problem Nobody Talks About

When I started building GoNoGo.team — a platform where AI agents interview founders by voice to... Read More

How I Built Aegis — A Credential Isolation Proxy for AI Agents

AI agents are getting really good at calling APIs. But the way we usually give them access — pasting... Read More

How We Ditched Backend Rendering and Went Full Client-Side with framewebworker

The Problem with Server-Side Video Rendering If you've ever built a video editing app, you... Read More

Writing a TypeScript Type Inference Engine in 300 Lines of Vanilla JS

Writing a TypeScript Type Inference Engine in 300 Lines of Vanilla JS A minimal... Read More

I Built a “Run Away From Work” Browser Game with React and TypeScript

Click Game Button 👇 Hi there! I’m @nyaomaru, a frontend engineer who got a cold after getting... Read More

The Type System: What You Know, What's New, and What's Weird

A backend developer's guide to TypeScript's type system: unions, literal types, discriminated unions, and why you won't miss class hierarchies. Read More

I Built a CLI AI Coding Assistant from Scratch — Here's What I Learned

I Built a CLI AI Coding Assistant from Scratch — Here's What I Learned TL;DR: I spent... Read More

Claude Code Skills Have a Model Field. Here's Why You Should Be Using It.

I've been building Claude Code skills for a few weeks. Writing the prompts, testing them, tweaking... Read More

I replaced 4 Play Console tabs with one terminal command

I used to start every morning the same way. Open the Play Console. Check the releases tab. Switch to... Read More

Why I Built a New Vite Env Plugin

The four problems with plain Vite environment variables — and the plugin I wrote to fix them. This... Read More

Building an AI Invoice Generator in a Week (Week 8 of My NanoCrafts Build Curriculum)

Week 8 of my NanoCrafts build curriculum had one goal: ship a second SaaS product fast. After... Read More

Two Subtle Bugs That Broke Our Remotion Vercel Sandbox (And How We Fixed Them)

We use Remotion to render video clips server-side, and we pre-build a Vercel Sandbox snapshot at... Read More

How We Ran Two Portals on the Same Domain During a React Migration (Without Users Noticing)

Imagine going live with your rewritten app and within an hour support tickets start flooding in. You... Read More

Building a SQL Tokenizer and Formatter From Scratch — Supporting 6 Dialects

Try it: devprix.dev/tools/sql-formatter This is part of DevPrix — 56 free developer tools that run... Read More

I Built a UK Business Intelligence MCP Server — Here's How

Last month I needed UK business data for a project I was building. Company records, Google ratings,... Read More

SvelteKit Port: 32.50 kB Gzip, +72% Over Plain Svelte — Meta-Framework Tax, Round Two

SvelteKit Port: 32.50 kB Gzip, +72% Over Plain Svelte — Meta-Framework Tax, Round... Read More

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero Dependencies

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero... Read More

Functions, Generics, and the Stuff That Looks Familiar But Isn't

TypeScript functions and generics for backend devs. Same concepts from Java and C#, different rules. Arrow functions, type guards, satisfies, overloads, and generics that actually feel useful. Read More

fixing two bugs stacked on top of each other in ProseMirror

i'm building a markdown editor built on Milkdown (which wraps ProseMirror). i hit a bug in how marks... Read More