Vitest 5, rslib 1.0, and the No Sloptober Challenge | News | Ep 80

News for the week of Aug 31, 2026: Vitest 5's new doctor command and perf enhancements, Rslib is now stable, and Astro 7.3 lets you run multiple preview servers at once. From the community: build circuit boards in React, TypeScript for Ruby devs, and another compile-time crime of implementing Brainf*** in TypeScript types. Partake in the No Sloptober Challenge! Head to no-sloptober.com to read the manifesto and see if you can challenge yourself to turn off LLMs and AI for October.  Sponsored by Excalibur.js Excalibur.js is the free and open source friendly TypeScript 2D game engine for the web. Learn to make web games with TypeScript or JavaScript! Excalibur comes out-of-the-box with everything you need, like physics, sprites, animations, sound effects, and first-party plugins for popular 2D gamedev tools. Homepage and Docs: https://excaliburjs.com Make Your First Game in 10 Minutes Join the Discord: https://discord.gg/9UemP985Uy Chapters (00:00) - Welcome to the Show (05:51) - Personal Challenge: No Sloptober (10:53) - Tooling: Strongly-typed Normalized File Paths in the TS Codebase (13:05) - Tooling: Ember for TS 7 Declared Ready (14:23) - Tooling: Bun 1.4.1 Now Types Import Attributes in TS 7.1 Nightly (14:49) - Tooling: Vitest 5 Brings Trace View, Doctor, and Temporal Mocking (17:08) - Tooling: rslib 1.0, like TSDown But Built on rspack (20:41) - Metaframeworks: Astro 7.3 Can Run Multiple Preview Servers at Once (21:16) - Security: Outsource Vulnerability Remediation to Cloudflare's Managed Defense (24:08) - Library Watch: Starlight 0.42 (25:17) - Library watch: HQTUI, a High Quality Terminal UI (26:08) - Library Watch: tsmc, a TypeScript Runtime Written in minc (27:27) - Library Watch: tscircuit, React for Electronics (29:01) - Library Watch: jasypdf, Declarative PDFs in Pure TypeScript (30:04) - Library Watch: @stdlib/stdlib, Fundamental Numerical Library for JS and TS (30:24) - Library Watch: RetroImgHandler Can Decode, Validate, Convert, Preview, and Encode Retro Graphics (31:12) - Library Watch: causewalk, Inner Exception Unwrapping (33:12) - Library Watch: numpy-ts 1.7.0 is Now Faster Than Native NumPy (34:12) - Community: Kev Helps Ruby Devs Learn TypeScript (34:48) - Community: Hugo Wrote Brainf*** in TypeScript Types (36:23) - Community: How Turbopack Chunks Your JavaScript by Next.js (36:52) - Community: How Next.js Closed 1500 GitHub Issues in One Month (38:32) - Community: What's New in Svelte, Aug 2026 (38:52) - Community: David Dal Busco Wrote Two Tiny Utils for the Result Pattern (40:54) - Community: Matt Pocock Praises Effect.ts for Backends (41:38) - Bleet of the Week (42:26) - Cool Link: Bookmarklet to Open a New Tab Next to the Current One (44:25) - Cool Link: Understanding TETRIS as a Game Developer (45:59) - Cool Link: Orbliterate! A Game That Uses CAD for Level Design (47:03) - The Minnesota Short Goodnight NewsTypeScript: Strongly Typed paths example  Ember for TS 7 declared ready  Bun v1.4.1 Vitest 5.0 is out Rslib 1.0 is out  Astro 7.3 – run multiple preview servers at once Cloudflare: Introducing context-aware vulnerability discovery and remediation Library Watch Starlight 0.42 documentation using Astro HQTUI: A high-quality terminal UI library TSMC: A TypeScript runtime written in minc TSCircuit: React for electronic circuit boards JASYPdf: Declarative PDFs in pure TypeScript Stdlib: Numerical and scientific funamental standard library for JS/TS RetroImgHandler: Encodes, decodes retro graphics Causewalk: Think inner exception unwrapping Numpy: 1.7.0 numpy-ts is faster than native Numpy From the Community Kev: TypeScript for Ruby devs · codingpaws Hugo: Brainf*** written in TS types  Next: How Turbopack chunks your JavaScript Next: How we closed 1,500 GitHub issues in one month  Svelte: What’s new in Svelte: September 2026  David Dal Busco: Two Tiny Utils for the Result Pattern  Effect: Matt Pocock praises Effect.ts  Bleet of the Week Cool Links Bookmarklet from Dr. Axel: Open new tabs next to current Understanding TETRIS As a Game Developer  Orbliterate! uses parametric CAD for levels with TypeScript scripting for game logic Music Seahorse Dreams by Kubbi (Spotify)