301: Testing, Debugging, and Departures

The final episode of Thinking Elixir after six incredible years of weekly episodes! We send things off in style with a packed news segment covering Phoenix LiveView 1.2's new colocated CSS powered by the @scope at-rule, the retirement of the long-standing Earmark Markdown library and why you should migrate to MDEx, a major Sagents v0.8.0 release bringing durable interrupts, and structured extraction, PostgreSQL 19's exciting new features including graph queries, SpaceX's jaw-dropping $60 billion acquisition of Cursor, and more! Finally, David shares his new role on the Erlang Ecosystem Foundation board, and Mark talks about what's next for Sagents and his exciting new AI-native startup. Thank you for six wonderful years. We're so glad you were here along the way and now for the final episode! 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://x.com/elixirphoenix/status/2065623059365540146 – Phoenix LiveView 1.2 announced, introduces colocated CSS for components. https://phoenixframework.org/blog/phoenix-liveview-1-2-released – Official LiveView 1.2 release blog post. https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@scope – MDN reference for the @scope CSS at-rule used by LiveView 1.2. https://css-tricks.com/almanac/rules/s/scope/ – CSS-Tricks explanation of @scope for scoped component styles. https://caniuse.com/?search=%40scope – Browser compatibility table for @scope. https://bsky.app/profile/tylerayoung.com/post/3mnxeflr3k22w – LiveView 1.2 additions including formatter support and new JS client docs. https://bsky.app/profile/ftes.de/post/3mnyjd5oa6c27 – LiveView 1.2 now emits telemetry events for exceptions in LiveComponent renders. https://x.com/germsvel/status/2066817890519548175 – German Velasco announces the ex_crap library for CRAP metrics. https://ex-crap.hexdocs.pm/readme.html – HexDocs for ExCrap, calculates Change Risk Anti-Patterns scores from cyclomatic complexity and test coverage. https://hex.pm/packages/earmark – Earmark is retired with known security vulnerabilities. https://x.com/leandrocesquini/status/2067577879563583649 – Leandro announces a migration guide from Earmark to MDEx. https://mdex.hexdocs.pm/earmark_to_mdex.html – Official MDEx migration guide from Earmark. https://x.com/leandrocesquini/status/2066951591391899900 – Hex.pm package pages now generated by MDEx and Lumis with better Markdown and themes. https://x.com/leandrocesquini/status/2064395634098962575 – MDEx 0.13 announced; syntax highlighting now disabled by default. https://github.com/leandrocp/mdex_native – New mdex_native package for direct Comrak calls without Rustler. https://github.com/leandrocp/mdex/blob/main/CHANGELOG.md#0130-2026-06-09 – MDEx 0.13 changelog detailing breaking changes and fixes. https://mdex.hexdocs.pm/syntax_highlight.html – MDEx docs on re-enabling syntax highlighting after the 0.13 change. https://bsky.app/profile/brainlid.bsky.social/post/3monfsjlkfs2v – Mark's Bluesky post announcing Sagents v0.8.0. https://www.postgresql.org/docs/19/release-19.html – Official PostgreSQL 19 release notes. https://x.com/alxshp/status/2065094274799296684 – Notable PostgreSQL 19 features highlighted. https://www.snowflake.com/en/blog/engineering/postgresql-19-features-beta/ – Snowflake blog covering PostgreSQL 19 beta features. https://www.msn.com/en-us/news/technology/spacex-agrees-to-buy-ai-coding-agent-cursor-for-60-billion/ar-AA25MgA4 – SpaceX agrees to acquire AI coding tool Cursor for $60 billion. Find us online Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social David Bernheisel on Bluesky - @david.bernheisel.com

Elixir v1.20 has officially landed, marking a huge milestone as the language is now officially a gradually typed language, type checking every single line of code without requiring developer annotations, and even prompting some developers to drop Dialyzer entirely. HexDocs is rolling out per-package subdomains for improved browser security isolation, the Erlang Ecosystem Foundation has launched an Ecosystem Registry to help answer "who uses this?" for Erlang, Elixir, and Gleam companies, and the Lua library for Elixir is approaching its v1.0 release with a brand new pure-Elixir Lua 5.3 VM. On the security front, a sophisticated self-replicating worm called Miasma compromised 73 Microsoft GitHub repos by exploiting legitimate OIDC tokens and valid SLSA provenance, even weaponizing AI coding tools like Claude Code and Cursor, raising fresh questions about supply chain safety and whether Hex might benefit from a cooldown mechanism like the one Ruby just shipped, and more! 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://x.com/josevalim/status/2062248428898254957 – José Valim announced the release of Elixir v1.20, highlighting it as now officially a gradually typed language. https://elixir-lang.org/blog/2026/06/03/elixir-v1-20-0-released/ – Official Elixir v1.20.0 release announcement https://bsky.app/profile/david.bernheisel.com/post/3mnkuwjup6c2g – David removing Dialyzer from a project https://x.com/TheErlef/status/2061525571226554684 – The Erlang Ecosystem Foundation announced the new HexDocs per-package subdomain URLs. https://hex.pm/blog/hexdocs-per-package-subdomains https://x.com/davydog187/status/2061938751257911316 – Dave Lucia announced the Lua library v1.0.0 RC https://x.com/davydog187/status/2062540335679422641 – Dave Lucia announced deflua.com https://deflua.com/ – The official website for Lua https://marketing.erlef.org/news/registry-announce.html – The Erlang Ecosystem Foundation announced the new Ecosystem Registry for companies https://registry.erlef.org/ – The ERLEF Ecosystem Registry https://x.com/gleamlang/status/2061800462530076748 – Gleam announced the release of version 1.17.0. https://gleam.run/news/single-file-gleam-beam-programs-with-escript/ – Gleam 1.17.0 release notes https://x.com/codebeamio/status/2065089786675601785 – Code BEAM Europe 2026 speakers have been announced. https://codebeameurope.com/#speakers – The Code BEAM Europe 2026 speakers lineup and talk topics. https://github.com/microsoft/pg_durable – Microsoft's pg_durable GitHub repo https://microsoft.github.io/pg_durable/ – Official documentation site for Microsoft's pg_durable Postgres extension. https://blog.rubygems.org/2026/06/03/cooldown-let-new-gems-be-vetted.html – Bundler's new cooldown feature https://linuxiac.com/arch-linux-aur-malware-campaign-hits-multiple-user-contributed-packages/ – Malware campaign affecting over 400 Arch Linux AUR packages https://cloudsmith.com/blog/miasma-worms-path-of-destruction – Cloudsmith's detailed write-up on the Miasma self-replicating malware worm https://www.microsoft.com/en-us/security/blog/2026/06/02/preinstall-persistence-inside-red-hat-npm-miasma-credential-stealing-campaign/ – Microsoft Security's blog post on the Miasma campaign

Mark shares a bittersweet housekeeping update — the Thinking Elixir Podcast is winding down, with the final episode airing June 23rd, 2026, closing the book on over six years of weekly shows. On the news front, Ecto 3.14 lands with long-awaited UUIDv7 support (time-sortable UUIDs for better index performance) along with a host of other improvements, Oban Pro adds a “human approval” workflow step that lets jobs pause mid-execution and resume on a signal without holding a database connection open, Hologram v0.9 arrives with a new Realtime feature enabling pure-Elixir WebSocket push from server to browser, Dashbit shares a behind-the-scenes look at how they designed Git integration in Tidewave Web across three developer personas, and the NSA drops new Zero Trust Implementation Guidelines that pair nicely with the Erlang Ecosystem Foundation's own security hardening document, and more! Show Notes online - http://podcast.thinkingelixir.com/307 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. The Thinking Elixir Podcast ends June 23rd, 2026 — over 6 years weekly, ~9 years of Elixir podcasting. Episode recorded ahead of time; major news that dropped after recording will be covered next episode. https://x.com/ryanwinchester/status/2057905815160258709 – Tweet announcing Ecto 3.14 with UUIDv7 support. https://github.com/elixir-ecto/ecto – Ecto GitHub repository. https://github.com/elixir-ecto/ecto/blob/master/CHANGELOG.md – Ecto v3.14 changelog — UUIDv7, reorder_assoc/2, HOT upserts, Ecto.Type.trim/2, Decimal v3, and more. https://hexdocs.pm/ecto/Ecto.UUID.html – Ecto.UUID docs — how to opt in to UUIDv7 or UUIDv7 monotonic via @primary_key. https://oban.pro/docs/pro/changelog.html – Oban Pro changelog — jobs can pause mid-execution for human approval via await_signal/1. https://x.com/bart_blast/status/2059830682143305781 – Tweet announcing Hologram v0.9 with new Realtime feature. https://hologram.page/blog/hologram-v0-9 – Hologram v0.9 blog post — full-stack Elixir framework adds server-to-browser WebSocket push in pure Elixir. https://x.com/josevalim/status/2060076009261515134 – José Valim tweets about Tidewave's new Git integration article. https://tidewave.ai/blog/designing-git-integration – Dashbit article on Tidewave's Git integration design — commits, push, PRs, and three developer personas. https://www.nsa.gov/Cybersecurity/ZIG/ – NSA Zero Trust Implementation Guidelines (ZIG) — comprehensive least-privilege access guidelines. https://www.nsa.gov/Cybersecurity/ZIG/Technology-Mapping/ – NSA ZIG Technology Mapping — capabilities and associated risks table. https://security.erlef.org/secure_coding_and_deployment_hardening/ – ERLEF Security WG's Secure Coding and Deployment Hardening guide. https://github.com/dashbitco/nimble_zta – nimble_zta — Dashbit's open-source Zero Trust Authentication library for Cloudflare, GCP, and Tailscale. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

Security takes center stage this week as the EEF's Jonatan Männchen highlights that atom exhaustion accounts for roughly one tenth of all CVEs in the BEAM ecosystem and Sobelow can help catch it before it hits production. Hackney users get an urgent nudge to upgrade to v4.0.3, which patches 9 CVEs including high-severity issues and fixes missing HTTP/3 certificate verification, thanks in part to Peter Ullrich's AI-assisted vulnerability research. On the exciting side, the new Elixir 1.20-rc.6 type system is proving its worth in the real world, with Tyler Young reporting it caught ~500 issues, including outright bugs, that 1.19 completely missed. Dannote releases "vibe", an ambitious BEAM-native coding agent for Elixir/OTP projects featuring a TUI, LiveView web console, subagents, and more! Show Notes online - http://podcast.thinkingelixir.com/306 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. The Thinking Elixir Podcast is ending June 23rd, 2026, after 6 years of weekly episodes. https://x.com/maennchen_/status/2059586280711651745 – Jonatan Männchen of the EEF notes that 35% of EEF CVEs are uncontrolled resource consumption, with atom exhaustion as a recurring cause. https://erlef.org/blog/security/atom-exhaustion – EEF blog post — atom exhaustion accounts for roughly one tenth of all BEAM ecosystem CVEs, yet it's well understood and preventable. https://cna.erlef.org/common-weaknesses – EEF CNA Common Weaknesses page showing the current CVE category distribution. https://hex.pm/packages/sobelow – Sobelow is a great Elixir security scanner that detects atom exhaustion and other issues — easy to add to CI. https://x.com/benoitc/status/2058909986084819267 – Announcement of hackney 4.0.1, a security release fixing vulnerabilities across HTTP/1.1, HTTP/2, HTTP/3, and WebSocket. https://github.com/benoitc/hackney/releases/tag/4.0.1 – hackney 4.0.1 release — fixes 9 CVEs (1 low, 4 medium, 4 high); upgrade to v4.0.3 for HTTP/3 certificate verification too. https://github.com/benoitc/hackney/blob/master/NEWS.md – hackney changelog with full details on all security fixes in 4.0.1 through 4.0.3. https://www.linkedin.com/posts/pjullrich_elixirlang-share-7464694254557237248-sICM/ – Peter Ullrich urges upgrading hackney to 4.0.1 ASAP after he and two others reported the vulnerabilities using AI-assisted research. https://cna.erlef.org/cves/ – EEF CNA CVE listing page referenced by Peter Ullrich in his hackney disclosure post. https://bsky.app/profile/tylerayoung.com/post/3mmwal5yrkc2y – Tyler Young upgraded to Elixir 1.20-rc.6 and the new type system found ~500 issues 1.19 missed, including real bugs. https://x.com/dan_note/status/2057966143369777407 – Dannote announces "vibe", a new BEAM-native coding agent for Elixir/OTP projects. https://github.com/elixir-vibe/vibe – vibe GitHub repo — a local OTP app with TUI, LiveView console, subagents, plugins, and project-aware Elixir eval. Experimental. https://bsky.app/profile/tylerayoung.com/post/3mmrla7tqrs2d – Tyler Young releases jump_credo_checks v0.3.0 with a new UnusedLiveViewAssign check. https://x.com/claudedevs/status/2059385239781384341 – Anthropic ships a free security-guidance plugin for Claude Code that reviews code at three levels; saw 30-40% fewer security PR comments internally. https://x.com/ogrizkov/status/2059417410940145689 – A user tested the Claude Code security plugin — it immediately blocked eval() and a dangerous regex with OWASP explanations. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

News includes Elixir 1.20.0-rc.6 arriving as likely the final release candidate before v1.20.0 ships, completing a ~15-week roadmap and delivering full type inference across applications and dependencies. The EEF 2026 election results are in with 3 returning and 1 new board member, LiveStash v0.3.0 lands with a Redis adapter and auto-stashing for Phoenix LiveView state recovery on WebSocket reconnects, a call goes out for BEAM ecosystem companies to step up and support the EEF’s critical security work, and GitHub suffered a significant breach when a hijacked VS Code extension quietly exfiltrated ~3,800 internal repositories in just 11 minutes, and more! Show Notes online - http://podcast.thinkingelixir.com/305 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://elixirforum.com/t/elixir-v1-20-0-rc-6-released/75448 – Elixir v1.20.0-rc.6 released on the ElixirForum - the likely final release candidate before v1.20.0 final, completing the ~15 week type inference roadmap. Includes tips for profiling compile times before and after upgrading. https://github.com/elixir-lang/elixir/releases/tag/v1.20.0-rc.6 – GitHub release page for Elixir v1.20.0-rc.6. Highlights include full type inference across applications and type inference across deps. https://erlef.org/blog/eef/election-2026-results – EEF 2026 election results - David Bernheisel, Francesco Cesarini, Amos King, and Alistair Woodman were elected. https://x.com/swmansionelixir/status/2054945784148201684 – Software Mansion announces LiveStash v0.3.0, featuring a new Redis Adapter and Auto-Stashing for Phoenix LiveView state recovery on WebSocket reconnects. https://github.com/software-mansion-labs/live-stash – GitHub repo for LiveStash - a library providing a reliable API to stash and recover Phoenix LiveView assigns when socket connections are interrupted or re-established. https://x.com/ZachSDaniel1/status/2057517360060522872 – A call to action for companies generating revenue on the BEAM ecosystem to support the EEF. The EEF maintains a CNA and coordinates security across the ecosystem including hex.pm, but the current effort is no longer sustainable. https://hauleth.dev/post/writing-tests/ – A solid blog post on writing better Elixir tests. Covers using a @subject module attribute, grouping tests with describe, preferring dependency injection over mocking, avoiding factory libraries in favor of calling context functions directly, and using property-based testing with StreamData. https://x.com/github/status/2056884788179726685 – GitHub's official tweet confirming unauthorized access to their internal repositories. No confirmed evidence of impact to customer data outside GitHub's internal repos at time of posting. https://x.com/intcyberdigest/status/2056970677668770117 – Report that GitHub was compromised by TeamPCP via a poisoned VS Code extension on an employee device, resulting in ~3,800 internal repositories being exfiltrated and sold on a cybercrime forum. https://x.com/star_knight12/status/2056977944334266428 – Detailed breakdown of the GitHub hack - the Nx Console VS Code extension (2.2M installs) was hijacked with a credential stealer hidden in an orphan commit. It harvested tokens from GitHub, npm, AWS, Kubernetes, and 1Password. The poisoned version was live for only 11 minutes before detection. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

News includes a major milestone for Elixir's set-theoretic types as inference of all language constructs is completed and merged with Elixir v1.20.0-rc.5 hot on its heels, OTP 29.0 drops as a major release with secure-by-default SSH, post-quantum SSL key exchange, Erlang doctests, and more, a wave of high-severity CVEs hits the Elixir and Phoenix stack prompting the EEF CNA to take on a larger work load as AI-driven vulnerability reports surge, string processing in Elixir gets a serious speed boost via SWAR (SIMD Within A Register) optimizations with 1.5–5x improvements across Base and String operations, and a handy tip for enabling state-preserving hot reloads in Phoenix LiveView with just a small dev.exs config tweak, and more! Show Notes online - http://podcast.thinkingelixir.com/304 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://x.com/josevalim/status/2054202778990383152 – José Valim announces that "inference of all language constructs" for Elixir's set-theoretic types has been completed and merged. https://github.com/elixir-lang/elixir/issues/14558 – The meta-issue tracking set-theoretic type inference of all Elixir constructs, now wrapped up. Includes occurrence typing for high-degree precision. A new RC is expected soon on the way to Elixir v1.20. https://x.com/josevalim/status/2054631923893313662 – José Valim announces the release of Elixir v1.20.0-rc.5 with the latest batch of typing and performance improvements. https://github.com/elixir-lang/elixir/releases/tag/v1.20.0-rc.5 – Release notes for Elixir v1.20.0-rc.5. The team says they are very close to the final release and encourages users to try it and report issues. https://cna.erlef.org/ – The EEF CNA (CVE Numbering Authority) has seen a large increase in volume of CVEs, largely driven by AI tools. They are considering a funding campaign to cover the increased costs of fixing and administering CVEs. https://bsky.app/profile/tylerayoung.com/post/3mlsxbdmrw22e – Tyler Young highlights a heap of recent high-severity CVEs published against the typical Elixir + Phoenix web stack. Packages to check include cowboy < 2.15.0, cowlib < 2.16.1, plug < 1.19.2, bandit < 1.11.1, and decimal < 3.0.0. https://cna.erlef.org/cves/ – Full list of CVEs issued by the EEF CNA. https://hex.pm/packages/mix_audit – The mix_audit package can be installed and run via mix deps.audit to check your app against up-to-date published CVEs. Recommended to make it part of your CI pipeline. https://www.erlang.org/news/188 – OTP 29.0 released as a new major version. Highlights include unsafe function warnings, SSH daemon now defaults to disabled shell/exec services, SFTP no longer enabled by default, post-quantum hybrid key exchange as default in SSL, ANSI terminal support, Erlang doctest support, and xref now handles ignore_xref natively. Note that 32-bit Windows builds are no longer available. https://bsky.app/profile/peterullrich.com/post/3mlmb7kwgoc2w – Peter Ullrich highlights performance improvements landing in Elixir — Base.valid(16|32|64)? is now 1.5-2.8x faster thanks to SWAR (SIMD Within A Register) optimizations. https://github.com/elixir-lang/elixir/pull/15357 – PR adding SWAR (SIMD Within A Register) versions of Base validations to Elixir. SWAR treats a CPU register like a small vector to check multiple bytes at once instead of one by one. https://github.com/elixir-lang/elixir/pull/15255 – PR applying SWAR optimization to ASCII fast paths in String.length/1 and String.slice, yielding 2-5x improvements for pure-ASCII strings. https://github.com/erlang/otp/pull/10948 – The SWAR technique was also applied to Erlang itself, accelerating binary ASCII traversal using 56-bit SWAR. Improvements range from 0x to 2x depending on the operation. https://www.linkedin.com/posts/jskalec_phoenix-liveview-has-one-massive-dx-feature-share-7459520758126473216-glO8 – The creator of the live_vue project shares a tip for enabling state-preserving hot reloads in Phoenix LiveView. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

News includes the Erlang Ecosystem Foundation publishing its 2026 board election candidates with voting now open, a new GitHub organization called Elixir-Vibe launching with tools to detect and fix AI-generated Elixir “slop” — including ExSlop and the related semantic linter Credence, erlang_python 3.0.0 arriving with true parallelism by embedding CPython into the BEAM as a first-class citizen, ElixirConf EU 2026 videos beginning to drop including keynotes from José Valim and Chris McCord, and more! Show Notes online - http://podcast.thinkingelixir.com/303 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://erlef.org/blog/eef/election-2026-candidates – Candidates for the Erlang Ecosystem Foundation 2026 board election have been published. Candidates include David Bernheisel, Jon Carstens, Francesco Cesarini (incumbent), Nathan Hessler, Amos King (incumbent), Greg Mefford, Duane Strikwerda, and Alistair Woodman (incumbent). Voting opens May 8th at 16:00 UTC and closes May 15th at 23:59 UTC. https://x.com/dan_note/status/2050239025458409646 – DanNote on GitHub created a new GitHub organization called "Elixir-Vibe" — a home for Elixir-native tooling for AI-assisted coding, AST analysis, structural code search, code quality, architecture analysis, and BEAM-native coding agents. https://github.com/elixir-vibe – The Elixir-Vibe GitHub organization housing libraries for fixing, reviewing, and spotting "slop" in AI-generated Elixir code. https://github.com/elixir-vibe/ex_slop – ExSlop is a library under Elixir-Vibe — Credo checks that catch AI-generated Elixir code slop. https://x.com/kamilskowron/status/2051778642053628125 – Announcement of Credence, a semantic linter for LLM-generated Elixir code that catches patterns that compile and pass tests but are non-idiomatic, inefficient, or ported from Python/JavaScript conventions that don't belong in Elixir. https://hex.pm/packages/credence – Credence on Hex.pm — a semantic linter for LLM-generated Elixir code. https://github.com/Cinderella-Man/credence – Credence on GitHub — complements the compiler and Credo by checking semantics of LLM-generated Elixir code. https://x.com/benoitc/status/2050939005395505185 – Benoit announced erlang_python 3.0.0, which embeds CPython into the BEAM with true parallelism via Python 3.14 OWN_GIL subinterpreters or free-threaded 3.13t, async/await, bidirectional Erlang↔Python callbacks, and stable thread affinity for numpy/torch. https://github.com/benoitc/erlang-python/releases/tag/3.0.0 – Release notes for erlang_python 3.0.0. https://github.com/benoitc/erlang-python – The erlang-python GitHub repo — combines Python's ML/AI ecosystem with Erlang's concurrency, making Python a first-class BEAM citizen rather than a simple guest like pythonx. https://www.youtube.com/playlist?list=PLvL2NEhYV4ZsIgecSexrk26--PBWiEyUy – Playlist of ElixirConf EU 2026 videos, which have started publishing. Includes keynotes from José Valim on type system design, Chris McCord on DurableServer, and more. https://x.com/josevalim/status/2052090411607286087 – José Valim announced Tidewave updates including a minimap on large file diffs, pin-point agent feedback, smoother onboarding for Tidewave Teams, and updates to OpenCode, Claude Code & Codex. https://open-design.ai/ – Open-source alternative to Claude Design. Turns your existing coding agent (Claude, Codex, Cursor, Gemini, OpenCode, Qwen) into a design engine driven by 31 composable skills and 72 brand-grade design systems. Available on Mac and Windows. https://github.com/nexu-io/open-design – GitHub repo for open-design, the open-source design engine for coding agents. https://x.com/bcardarella/status/2050578567897985072 – Brian Carderella posted about open-design saying "OpenDesign is fantastic. Within 10 minutes it's already replaced Claude Design for me." https://docs.aws.amazon.com/bedrock/latest/userguide/bedrock-mantle.html – AWS Mantle - an OpenAI compatible API to many different LLM models https://docs.aws.amazon.com/bedrock/ – AWS Bedrock - The hosting of many different LLM models https://hexdocs.pm/langchain/LangChain.ChatModels.ChatAwsMantle.html – Elixir LangChain support for AWS Mantle using ChatAwsMantle Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

News includes Mob, an exciting new framework that brings BEAM-on-device mobile development to Elixir with OTP running natively inside iOS and Android apps, Folio a new library for generating print-quality PDFs and SVGs from Elixir data powered by Typst via Rustler NIF, both Oban v2.22 and Oban Pro v1.7.0 were released with a host of improvements including job querying, unique workflows, and a rate limiting overhaul, LiveVue v1.1 arrives with Node-less SSR via QuickBeam and persistent layouts, erlang_quic v1.3.0 brings a production-ready pure-Erlang QUIC and HTTP/3 stack to OTP 27, and more! Show Notes online - http://podcast.thinkingelixir.com/302 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://x.com/dan_note/status/2048273367598252360 – Announcement tweet for Folio, a new Elixir library for generating print-quality PDFs, SVGs, and PNGs from Markdown and Elixir data. https://github.com/dannote/folio – Folio on GitHub — an open-source library that generates print-quality PDF/SVG/PNG from Elixir data, powered by Typst via Rustler NIF. Documents are Elixir values with no templates or external processes required. https://genericjam.com/blog/mob-intro – Blog post introducing Mob — "LiveView for native mobile via NIF with BEAM on device with native views and all logic in Elixir." Created by Kevin Edey, a former React Native and native iOS developer. https://hexdocs.pm/mob/readme.html – Mob HexDocs — a BEAM-on-device mobile framework for Elixir. OTP runs inside iOS and Android apps via a thin NIF, with screens as GenServers and UI rendered by Compose and SwiftUI. Currently in early development. https://github.com/GenericJam/mob – Mob on GitHub — the source for the BEAM-on-device mobile framework supporting Android emulator and iOS simulator. https://x.com/sorentwo/status/2049057610721112537 – Announcement tweet for Oban v2.22 open-source release, highlighting new features including Job Querying, Smarter Sonar, and Migration Checks. https://github.com/oban-bg/oban/releases/tag/v2.22.0 – Oban v2.22.0 release notes covering Job Querying, Smarter Sonar, and Migration Checks improvements. https://x.com/sorentwo/status/2049844973445468336 – Announcement tweet for Oban Pro v1.7.0, highlighting Signals and awaiting, Unique workflows, Rate limiting overhaul, Chunking overhaul, Global cancel/discard hooks, and Improved indexes. https://oban.pro/docs/pro/1.7.0/changelog.html – Oban Pro v1.7.0 changelog detailing Signals and awaiting, Unique workflows, Rate limiting overhaul, Chunking overhaul, Global cancel/discard hooks, and Improved indexes. https://x.com/jskalc/status/2048787962666623106 – Announcement tweet for LiveVue v1.1, highlighting Node-less SSR via QuickBeam, v-inject directive, headless components, and shared props. https://x.com/jskalc/status/2048787965111918775 – Follow-up tweet introducing QuickBeam as a new third SSR mode for LiveVue — running QuickJS as a NIF for better performance, now the default mode. https://hexdocs.pm/live_vue/persistent_layout.html – LiveVue docs on persistent layouts — allows rendering a root Vue component in root.heex.html that survives navigation, preserving local state, scroll position, etc., with components passed as slots. https://x.com/dan_note/status/2049054978384208212 – Announcement tweet for ExAST, a new library for searching, replacing, and diffing Elixir code by AST pattern. https://github.com/dannote/ex_ast – ExAST on GitHub — provides a query API for structural searches and codemods over Elixir AST, with support for matching by shape, filtering by context, resolving local aliases, and composing predicates. https://ast-grep.github.io/ – ast-grep — a related tool referenced in the ExAST context for structural code search and rewriting. https://www.linkedin.com/pulse/erlangquic-pure-erlang-quic-http3-stack-benoit-chesneau-ccd3e – LinkedIn article introducing erlang_quic — the first production-ready pure-Erlang implementation of QUIC and HTTP/3, implementing RFC 9000/9001, RFC 9114, RFC 9204, and extension RFCs. https://x.com/benoitc/status/2047955032100725237 – Announcement tweet for erlang_quic v1.3.0, a pure-Erlang QUIC and HTTP/3 stack running on stock OTP 27 or newer. https://github.com/benoitc/erlang_quic – erlang_quic on GitHub — pure-Erlang QUIC/HTTP3 stack with no external dependencies, featuring three congestion controllers, connection migration, TLS 1.3, and a quic_dist mode replacing TCP-based distribution. https://github.com/benoitc/erlang_quic/blob/main/docs/h3_compliance.md – HTTP/3 Compliance Matrix for erlang_quic, documenting RFC compliance status across the implementation. https://www.linkedin.com/posts/carlos-daniel-pohlod-software-engineer_ruby-spinel-ugcPost-7454676794986790912-rqZy – LinkedIn post about Spinel, an experimental compiled Ruby project by Matz (creator of Ruby) that can be up to 86× faster than miniruby in benchmarks. Relevant to the Elixir community given Ruby's influence on Elixir's syntax. https://github.com/matz/spinel – Spinel on GitHub — compiles Ruby source code into standalone native executables via whole-program type inference and optimized C code generation, achieving significant speedups over CRuby. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

News includes Phoenix LiveDebugger hitting v1.0 with an interactive tour to go along with it, LiveStash v0.2.0 shipping with API improvements and a tease of Redis & Mnesia adapters on the horizon, German Velasco making his TestingLiveView.com course completely free for the Elixir community, Volt reaching v0.8.0 as an Elixir-native frontend build tool that eliminates the need for Node.js, and Francesco Cesarini announcing his departure from Erlang Solutions while pledging to remain active in the Erlang Ecosystem Foundation, and more! Show Notes online - http://podcast.thinkingelixir.com/301 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://x.com/swmansionElixir/status/2047324614519652484 – Phoenix LiveDebugger hits v1.0 — Software Mansion announces the milestone release, signaling a shift from active development to maintenance. They consider it feature-complete. https://github.com/software-mansion-labs/live-debugger-tour – LiveDebugger Tour — an interactive, hands-on tutorial launched alongside v1.0 to walk users through everything LiveDebugger has to offer. https://x.com/swmansionelixir/status/2046960595455369469 – LiveStash v0.2.0 released by Software Mansion — a new version shaped by API feedback, with v0.3.0 teasing Redis & Mnesia adapters. https://hex.pm/packages/live_stash – LiveStash on Hex.pm — the package that solves Phoenix LiveView's state loss during WebSocket reconnects. https://live-stash-demo.swmansion.com/ – Interactive demo site for LiveStash. https://github.com/software-mansion-labs/live-stash – LiveStash GitHub repository. https://github.com/software-mansion-labs/live-stash/blob/main/CHANGELOG.md – LiveStash changelog detailing v0.2.0 changes. https://x.com/germsvel/status/2046896967330955336 – German Velasco announces that his TestingLiveView.com course is now free for the community. https://www.testingliveview.com/ – TestingLiveView.com — a deep-dive course on testing Phoenix LiveView, now free. https://www.youtube.com/playlist?list=PLvQQYdm3-Eoi6aZFyCngEFKHNL2f92gpI – YouTube playlist for the TestingLiveView course, with videos, explanations, and code samples for each lesson. https://thinkingelixir.com/available-courses/index.html – ThinkingElixir.com courses — also made free when Mark's focus shifted, similarly giving back to the Elixir community. https://x.com/dan_note/status/2046539535287287862 – Volt reaches v0.8.0 — the Elixir-native frontend build tool adds a mix igniter command to migrate projects from esbuild + Tailwind with no Node.js required. https://github.com/elixir-volt/volt – Volt GitHub repository — an Elixir-native frontend build tool supporting JavaScript, TypeScript, Vue SFCs, and CSS with a dev server, HMR, and production builds. https://x.com/FrancescoC/status/2047325522330312880 – Francesco Cesarini announces he is leaving Erlang Solutions, where he served as Founder & Technical Director. https://www.linkedin.com/posts/francescocesarini_this-is-my-last-week-at-erlang-solutions-share-7453064615325900800-Gfcv/ – Francesco Cesarini's LinkedIn post about his departure from Erlang Solutions, noting he will remain involved in the Erlang Ecosystem Foundation (EEF) and the community. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]

It's Episode 300 — a milestone just under 6 years in the making! To celebrate, we kick things off with a fun song, then dive into the news: the Localize library v0.15.0 brings locale-aware formatting and Unicode CLDR data to Elixir without any compile-time code generation, a new library called Reach builds program dependence graphs for Elixir and Erlang to help coding agents and static analysis tools understand your codebase, Tidewave gets exciting updates including voice input with click-to-add context and the ability to install it as a PWA, the ErlEF has opened its 2026 board elections with voting running May 8-15, and more! Then we sit down with José Valim for an in-depth interview covering Elixir v1.20, the latest progress on the set-theoretic type system, the story behind Tidewave, and how AI is — and isn't — changing development on Elixir itself. Show Notes online - http://podcast.thinkingelixir.com/300 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://github.com/elixir-localize/localize – The Localize library v0.15.0 was released — a locale-aware formatting, validation, and data access library for Elixir built on the Unicode CLDR repository. Consolidates the ex_cldr_* family into a single package with no compile-time code generation; all CLDR data loads at runtime and caches in :persistent_term. https://x.com/dan_note/status/2044763774146466053 – Announcement tweet for the new "Reach" library — a program dependence graph tool for Elixir and Erlang. https://github.com/dannote/reach – Reach builds a graph of data flow, control flow, and side effects in your code so you can trace values to their origin, find tainted paths from user input to dangerous sinks, or check if statements can be safely reordered. Works on Elixir/Erlang source and compiled BEAM bytecode. https://x.com/josevalim/status/2044483950089834990 – José Valim demos new Tidewave updates — voice input now works, and while talking you can click on elements to build context into a message. Also works when referencing lines of code in code reviews. https://x.com/josevalim/status/2044060492704948305 – Tidewave can now be installed as a browser PWA (Progressive Web App). https://bsky.app/profile/david.bernheisel.com/post/3mjkl6ck4a22c – David Bernheisel shares a "frustration driven development" Zsh autocompletion script for mix tasks — announcement and discussion post on Bluesky. https://github.com/dbernheisel/dotfiles/blob/master/.local/bin/_mix – The Zsh autocompletion script for mix tasks. Runs mix help to find tasks and their descriptions, then mix help {task} for switches, feeding results into the Zsh completion engine with per-project caching. https://erlef.org/blog/eef/election-2026 – The Erlang Ecosystem Foundation has announced its 2026 board elections. Candidacy submissions close May 7th (23:59 UTC), voting runs May 8–15. Must be a paying, contributing, or managing member to participate. Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected] Guest Information https://genserver.social/josevalim – José Valim on Mastadon https://x.com/josevalim – José Valim on X/Twitter https://github.com/josevalim – José Valim on Github https://dashbit.co/ – Dashbit website and blog Find us online Message the show - Bluesky Message the show - X Message the show on Fediverse - @[email protected] Email the show - [email protected] Mark Ericksen on X - @brainlid Mark Ericksen on Bluesky - @brainlid.bsky.social Mark Ericksen on Fediverse - @[email protected] David Bernheisel on Bluesky - @david.bernheisel.com David Bernheisel on Fediverse - @[email protected]