Aspire 13.2, Hybrid Type-aware Linting, and Claude Wrote a JS Engine | News | Ep 61

News for the week of March 23, 2026: Aspire 13.2 now supports TypeScript app hosts, Node.js security releases, and axios got got. From the community: Auvred's hybrid linting research, refactoring with generics, and sharing signals across the server-client boundary. Plus, using Claude to write a JS engine from scratch.

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• Homepage and Docs: https://excaliburjs.com
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Chapters

• (00:00) - Welcome to the Show
• (05:29) - News: Node.js Security Fixes Available
• (07:00) - News: Aspire 13.2 Brings TypeScript AppHost Support
• (10:19) - News: Firefox 149 Adds Split View, Free VPN
• (13:00) - News: Replay Adds React Render Debugging MCP Support
• (13:55) - PSA: Axios Supply Chain Attack
• (17:30) - Library Watch: Astro 6.1
• (18:08) - Library Watch: ArrowJS 1.0, Agent UI Framework
• (19:48) - Library Watch: OxMgr, a Rust Port of PM2
• (21:13) - Library Watch: AshTypeScript 0.16.0 with Typed Channels
• (22:11) - Library Watch: Pathwrite, a TypeScript Workflow Builder
• (24:14) - Library Watch: Reflow, Durable Workflows for TypeScript
• (26:28) - Library Watch: Pretext, Measure Text in Pure TypeScript
• (28:15) - Community: Hybrid Type-aware Linting Research by Auvred
• (29:54) - Community: State of Flint, Spring 2026 by Josh Goldberg
• (31:40) - Community: On Refactoring with Generic Types by Radoslaw Miernik
• (32:44) - Community: Bridging the Client-Server Boundary with Signals by Jovi
• (33:45) - Community: Building a JavaScript Engine with Claude Opus by Paulo Matos
• (38:19) - Community: WebMCP vs. MCP by Chrome Dev Blog
• (39:25) - Community: Remodel Your TS Code with Decorators by Michael Dowden
• (40:22) - Community: Vitest Crash Course by Web Dev Simplified
• (40:36) - Bleet of the Week
• (40:52) - Secret of the Handbook: unique symbol
• (42:52) - Cool Video: Understanding Complex Type Systems
• (43:37) - Cool Video: The Weirdest Result of Relativity You've Never Heard Of
• (45:02) - Cool Video: Watch Matt Pocock Implement a Feature with Claude Code
• (46:46) - The Minnesota Long Goodbye

News

• Node.js: Node.js — Tuesday, March 24, 2026 Security Releases 
• Aspire: Announcing Aspire 13.2
  • Josh Goldberg: TypeScript + Aspire talk
• Firefox: Firefox 149.0, split tabs, free VPN
• Replay: React Renders MCP tool for debugging
• PSA: Supply Chain Attack on Axios Pulls Malicious Dependency from npm 

Library Watch

• Astro 6.1 – highlights
• Arrow.js: TypeScript agent UI framework
• Vladimir-Urik/OxMgr: Rust-alternative to PM2 process manager (language agnostic) 
• AshTypeScript 0.16.0: TypedChannels (via Zach Daniel)
• Pathwrite: A TypeScript-first multi-step workflow builder for every framework
• Reflow: TypeScript workflow engine using SQLite

From the Community

• Pretext: Text Layout in TypeScript (via conputer dipshit)
• Golar gets a linter  (via Josh Goldberg)
• Auvred: Hybrid type aware linting
• Josh Goldberg: State of Flint: Spring 2026 
• Radosław Miernik: On Refactoring with Generic Types 
• Jovide Croock: Bridging the Server-Client Boundary with Signals (Bsky)
• Paulo Matos: Agent builds a JS engine from scratch that passes test262 100% (via Rob Palmer)
• Chrome Dev Blog: When to use WebMCP and MCP
• Michael Dowden: Remodel Your TypeScript Code with Decorators 
• Web Dev Simplified: Vitest Crash Course
• Bleet of the week
• Secret of the Handbook: Unique Symbols 

Cool Links

• Video: Understanding complex type systems
• Video: Weirdest result of relativity you've never heard of
• Video: Real-world Claude building a feature step-by-step (Matt Pocock)

Music
Seahorse Dreams by Kubbi (Spotify)