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 (http://podcast.thinkingelixir.com/275)
Elixir Community News
https://paraxial.io/ (https://paraxial.io/?utm_source=thinkingelixir&utm_campaign=thinkingelixir-oct2025) – 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 (https://netter.net/josevalim/status/1975605515313979674?utm_source=thinkingelixir&utm_medium=shownotes) – José Valim announces Elixir v1.19.0-rc.2 release
https://elixirforum.com/t/elixir-v1-19-0-rc-2-released/72805 (https://elixirforum.com/t/elixir-v1-19-0-rc-2-released/72805?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://nitter.net/josevalim/status/1975588421201715334?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://nitter.net/z_4seven/status/1975795139739357404?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://nitter.net/sleipni_r/status/1977901944329875893?utm_source=thinkingelixir&utm_medium=shownotes) – Elixir gRPC library v0.11.0 release announcement
https://github.com/elixir-grpc/grpc (https://github.com/elixir-grpc/grpc?utm_source=thinkingelixir&utm_medium=shownotes) – Full-featured Elixir implementation of gRPC protocol with new Client Load Balancing following official specs
https://hexdocs.pm/req_cassette (https://hexdocs.pm/req_cassette?utm_source=thinkingelixir&utm_medium=shownotes) – ReqCassette documentation - new Req library for recording and serializing real requests in tests
https://github.com/lostbean/req_cassette/ (https://github.com/lostbean/req_cassette/?utm_source=thinkingelixir&utm_medium=shownotes) – ReqCassette GitHub repository, similar to ExVCR but works with Req and supports async tests
https://github.com/parroty/exvcr (https://github.com/parroty/exvcr?utm_source=thinkingelixir&utm_medium=shownotes) – ExVCR library for comparison
https://nitter.net/karlclement/status/1976677105980072238 (https://nitter.net/karlclement/status/1976677105980072238?utm_source=thinkingelixir&utm_medium=shownotes) – Karl Clement's Twitter thread asking who's using Elixir in production with numerous company replies
https://nitter.net/germsvel/status/1976264583682625776 (https://nitter.net/germsvel/status/1976264583682625776?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://www.youtube.com/watch?v=eBpDaUVxiII?utm_source=thinkingelixir&utm_medium=shownotes) – Episode
https://www.youtube.com/shorts/fpbWpunfLVg (https://www.youtube.com/shorts/fpbWpunfLVg?utm_source=thinkingelixir&utm_medium=shownotes) – German Velasco's short video illustrating Ecto's datetime helpers
https://nitter.net/bcardarella/status/1976217163754070372 (https://nitter.net/bcardarella/status/1976217163754070372?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://elixir-observer.com/packages/req?utm_source=thinkingelixir&utm_medium=shownotes) – Elixir Observer website updates by Mimiquate with better design and new features
https://elixir-observer.com/categories (https://elixir-observer.com/categories?utm_source=thinkingelixir&utm_medium=shownotes) – 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 (https://nitter.net/chris_mccord/status/1976813860742217754?utm_source=thinkingelixir&utm_medium=shownotes) – 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/ (https://github.blog/changelog/2025-09-29-strengthening-npm-security-important-changes-to-authentication-and-token-management/?utm_source=thinkingelixir&utm_medium=shownotes) – 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
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