Bun.WebView, Cursor's Big Bet, and Whether Mythos Just Spells Marketing | News | Ep 63

News for the week of April 6, 2026: latest Bun release adds automated headless browser automation, whether Anthropic is using fear-based marketing, and major releases from Storybook and Docusaurus. From the community: why nominal typing deserves to be first-class, what to do about OSS vulnerabilities, and lessons from building a Rust runtime for TS.

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Chapters

• (00:00) - Welcome to the Show
• (04:41) - News: Bun 1.3.12 Introduces WebView and Markdown Renderer
• (06:52) - News: Does Claude Mythos Spell Doom or Is It Just Marketing?
• (10:06) - News: Cursor 3 is Betting That the IDE Will Be Dead
• (15:20) - News: Ember.js is Using Vite by Default Now
• (15:52) - News: SvelteKit, Now with TS 6 Support
• (16:02) - News: VoidZero Experiments with Making Angular Compiler Faster
• (18:05) - News: Docusaurus 3.10 Prepares for v4 Release
• (20:12) - News: Storybook 10.3, React MCP and Type-safe CSF Factories
• (21:03) - Library Watch: better-translate, Type-safe Internationalization
• (22:25) - Library Watch: tiny-tts, Offline CPU Text-to-Speech in Node.js
• (24:06) - Library Watch: Pagyra, HTML to PDF in TypeScript
• (25:35) - Library Watch: PayKit, a TypeScript Billing Framework
• (26:54) - Library Watch: tsnapi, Snapshot Your TS Library Surface
• (27:43) - Highlight: What's New in JavaScript 2026 by Frontend Masters
• (28:51) - Highlight: Parse, Don't Validate -- In A Language That Doesn't Want You To by Cekrem
• (33:16) - Highlight: Building a Rust Runtime for TypeScript by Encore
• (35:55) - Highlight: Weak Map Memory Leak Trap by Peter Kroner
• (37:57) - Highlight: TypeScript 6 and CSS Side Effect Imports by Schalk Neethling
• (40:30) - Highlight: Integrating TS Go and the Effect LSP
• (41:44) - Highlight: Moving Railway's Frontend Off Next.js
• (43:24) - Highlight: Prisma Next Makes MongoDB Type-safe
• (44:21) - Highlight: Just Keep Vulnerabilities Open by James Sumners
• (48:46) - Bleet of the Week
• (51:18) - Cool Video: Real-time Sand Simulation... in SQL
• (52:16) - Cool Video: Building a Programming Language from Scratch Using TypeScript
• (53:03) - Cool Language: Xena, Inspired by TypeScript
• (55:18) - Cool Read: Building a CLI for All of Cloudflare
• (57:21) - Cool Read: Cloudflare Sandboxes are Now GA
• (58:01) - The Minnesota Long Goodbye

News

• Bun 1.3.12
• Claude Mythos Preview
• Anthropic's Red Team blog post goes into detail
• Claude Mythos is Actually Scary
• You Actually Do Need to Understand Mythos
• The New Stack: Cursor's $2 billion bet: The IDE is now a fallback, not the default
• Ember.js is using vite by default
• SvelteKit 2.56.0 has TS 6.0 support
• VoidZero: How we made the Angular Compiler faster using AI
• Docusaurus 3.10
• Storybook 10.3

Library Watch

• better-translate: Type-safe i8n for any TypeScript project
• tiny-tts: Zero-dependency CPU-only text-to-speech with ONNX model
• pagrya-js: HTML-to-PDF in pure TypeScript
• PayKit: TypeScript billing framework
• tsnapi: Snapshot testing utility for the public API for library maintainers

From the Community

• Frontend Masters: What To Know in JavaScript (2026 Edition)
• Cekrem: Parse, Don't Validate — In a Language That Doesn't Want You T
• Encore: What We Learned Building a Rust Runtime for TypeScript
• Peter Kroner: The WeakMap Subtype Memory Leak Trap
• Schalk Neethling: TypeScript 6.0 and CSS Side-Effect Imports
• Effect.js: TypeScript-Go with Effect LSP
• Railway: Moving Railway's Frontend Off Next.js
• Prisma Next: MongoDB Without Compromise
• James Sumners: Open Source & Security
• Bleet of the Week: types *are* the job

Cool Links

• Video: I Made Real-Time Sand Simulation in SQL
• Video: Can I build my own programming language from scratch? w/ TypeScript
• Language: https://github.com/elematic/zena
• Read: Building a CLI for all of Cloudflare
• Read: Sandboxes are GA
• Read: Managers and Executives Disagree on AI—and It’s Costing Companies
• Read: White-collar workers are quietly rebelling against AI as 80% outright refuse adoption mandates

Music
Seahorse Dreams by Kubbi (