News includes the release of Elixir v1.19.0-rc.2 with impressive deps compile times and optimized set-theoretic type checking, a timeline update on typed structs arriving by next year, the new "mix help app:phoenix" command for building AI Agent context, gRPC library v0.11.0 with client load balancing, ReqCassette for recording test requests, German Velasco's video walkthrough of Phoenix's AGENTS.md file, Brian Cardarella's insights on the influx of AI-generated codebases needing rescue, Elixir Observer's major updates with categories and semantic search, Chris McCord's demonstration of isolated AI coding sandboxes on Fly Machines, NPM's new security changes for token management, and more!

Show Notes online - http://podcast.thinkingelixir.com/275

Elixir Community News

• https://paraxial.io/ – Paraxial.io is sponsoring today's show! Sign up for a free trial of Paraxial.io today and mention Thinking Elixir when you schedule a demo for a special offer.
• https://netter.net/josevalim/status/1975605515313979674 – José Valim announces Elixir v1.19.0-rc.2 release
• https://elixirforum.com/t/elixir-v1-19-0-rc-2-released/72805 – Elixir Forum discussion of v1.19.0-rc.2, the last stop before official v1.19 release
• Remote.com confirmed their codebase compiles 55% faster on v1.19 with type checking still ~1ms/module on average
• José and Guillaume Duboc went beyond current state-of-the-art to optimize key operations for set-theoretic type checking, articles to be published later
• https://nitter.net/josevalim/status/1975588421201715334 – New "mix help app:phoenix" command in Elixir v1.19 lists all modules with first paragraph of docs
• Great shortcut tool for building AI Agent context with brief module descriptions
• https://nitter.net/z_4seven/status/1975795139739357404 – José Valim provides update on Elixir's typesystem status and timeline
• Plan shifted from typed structs by end of year to providing type inference of all constructs; typed structs might arrive by end of next year
• https://nitter.net/sleipni_r/status/1977901944329875893 – Elixir gRPC library v0.11.0 release announcement
• https://github.com/elixir-grpc/grpc – Full-featured Elixir implementation of gRPC protocol with new Client Load Balancing following official specs
• https://hexdocs.pm/req_cassette – ReqCassette documentation - new Req library for recording and serializing real requests in tests
• https://github.com/lostbean/req_cassette/ – ReqCassette GitHub repository, similar to ExVCR but works with Req and supports async tests
• https://github.com/parroty/exvcr – ExVCR library for comparison
• https://nitter.net/karlclement/status/1976677105980072238 – Karl Clement's Twitter thread asking who's using Elixir in production with numerous company replies
• https://nitter.net/germsvel/status/1976264583682625776 – German Velasco's new ElixirStream video walking through Phoenix 1.8 AGENTS.md file
• Full video is ~25 minutes or split into 12 shorter videos showing what AI typically gets wrong in new Phoenix apps
• https://www.youtube.com/watch?v=eBpDaUVxiII – Episode
• https://www.youtube.com/shorts/fpbWpunfLVg – German Velasco's short video illustrating Ecto's datetime helpers
• https://nitter.net/bcardarella/status/1976217163754070372 – Brian Cardarella shares insight about clients needing help finishing AI-generated apps
• DockYard seeing many AI slop generated apps that are nightmares to build on top of
• https://elixir-observer.com/packages/req – Elixir Observer website updates by Mimiquate with better design and new features
• https://elixir-observer.com/categories – New categories feature for package discovery (Actors, AI, Audio, Authentication, etc.)
• Categories include semantic search and show unreleased changes per package
• https://nitter.net/chris_mccord/status/1976813860742217754 – Chris McCord demonstrates creating isolated Claude Code sandbox instances on Fly Machines in 15 seconds
• Interesting approach for running AI agents fully isolated from local machine
• https://github.blog/changelog/2025-09-29-strengthening-npm-security-important-changes-to-authentication-and-token-management/ – NPM announces new security changes including more frequent token rotation and Trusted Publishers (OIDC) support
• Response to recent supply chain attacks showing compromised long-lived tokens are critical vulnerability

Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at show@thinkingelixir.com

Find us online

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• Message the show on Fediverse - @ThinkingElixir@genserver.social
• Email the show - show@thinkingelixir.com
• Mark Ericksen on X - @brainlid
• Mark Ericksen on Bluesky - @brainlid.bsky.social
• Mark Ericksen on Fediverse - @brainlid@genserver.social
• David Bernheisel on Bluesky - @david.bernheisel.com
• David Bernheisel on Fediverse - @dbern@genserver.social

Sponsored By:

• Paraxial.io: Paraxial.io is sponsoring today's show! Sign up for a free trial of Paraxial.io today and mention Thinking Elixir when you schedule a demo for a special offer.