Software Engineer @ Vercel. WordPress Core Committer. Former Google. Runner, musician, movie geek. Aprendiendo español. Fueled by Mountain Dew.https://bsky.app/profile/felixarntz.bsky.socialhttps://bsky.app/profile/felixarntz.bsky.social/post/3mbw6umsaa22kI'm super excited to share my next adventure: Later this month, I'll be joining @vercel.com to work on the AI SDK! 🎉 https://felix-arntz.me/blog/joining-vercel-work-on-ai-sdk/08 Jan 2026 14:27 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3mbw6umsaa22khttps://bsky.app/profile/felixarntz.bsky.social/post/3m65wobsfrk2wIntroducing the WordPress AI Client SDK: https://make.wordpress.org/ai/2025/11/21/introducing-the-wordpress-ai-client-sdk/21 Nov 2025 18:41 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3m65wobsfrk2whttps://bsky.app/profile/felixarntz.bsky.social/post/3m5molfpqns2g🚀 Announcing the WordPress AI Client SDK (v0.1.0)! It's never been easier to integrate generative AI into your plugins. ✅ Uniform API for any model (OpenAI, Google, etc.) ✅ WP-native fluent prompt builder ✅ Built-in admin screen for API keys Get started now. 👇14 Nov 2025 22:01 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3m5molfpqns2ghttps://bsky.app/profile/felixarntz.bsky.social/post/3m4xxx7px3k2eWe use coding agents daily, for our own engineering efforts, or to power SaaS we build. Yet, almost all of these agents are tied to specific infrastructure - the vendor lock-in is real, flexibility is low. Introducing AI Code Agents, a TypeScript SDK to solve these issues. 👇06 Nov 2025 16:22 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3m4xxx7px3k2ehttps://bsky.app/profile/felixarntz.bsky.social/post/3m3ulyy3olk2jI believe the biggest innovations in the AI application layer are happening right now in the TypeScript ecosystem. The AI tooling revolution is finally meeting the web development community somewhere they live. Read more on my perspective and excitement: https://felix-arntz.me/blog/typescript-is-the-new-language-of-the-ai-frontier-and-im-excited/23 Oct 2025 14:46 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3m3ulyy3olk2jhttps://bsky.app/profile/felixarntz.bsky.social/post/3m3nxsuqdcs26The PHP AI Client SDK version 0.2.0 is out now, with several key enhancements and fixes for more developer convenience. If you haven't yet, give it a try to build your invisible AI features, agents, and workflows in a model agnostic way. Release notes: https://github.com/WordPress/php-ai-client/releases/tag/0.2.020 Oct 2025 23:28 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3m3nxsuqdcs26https://bsky.app/profile/felixarntz.bsky.social/post/3lxpkzqegsk2eAwesome news for OSS projects embracing AI assisted coding: agents.md Finally projects can provide LLM instructions without favoring a specific provider or tool, and without including duplicate instructions files. A simple yet huge step in the right direction. 🎉 https://agents.md31 Aug 2025 17:04 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lxpkzqegsk2ehttps://bsky.app/profile/felixarntz.bsky.social/post/3lxlaea76tk26If you want to play around with or explore the code of the WordPress AI chatbot agent demo from Matt Mullenweg's #WCUS keynote, here is the GitHub repository: https://github.com/felixarntz/wp-ai-sdk-chatbot-demo There's also a screencast that shows a few things it can do: youtu.be/LX1kAR4Js9829 Aug 2025 23:42 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lxlaea76tk26https://bsky.app/profile/felixarntz.bsky.social/post/3lwwpgwsa2c24We are a looking for questions and potential discussion points for the WordPress AI Panel about what we're building, next week at #WCUS: https://us.wordcamp.org/2025/session/core-ai-what-were-building/ If you have something you'd like to have us discuss or cover, please reply to this thread!21 Aug 2025 19:46 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lwwpgwsa2c24https://bsky.app/profile/felixarntz.bsky.social/post/3lwov2cdc7s2hI had a great time doing this Startup Grind webinar about the AI Services plugin for WordPress. Lots of live demos and context for how to use it, how it ties in with the WordPress AI Team efforts, etc. Take a look! https://www.youtube.com/watch?v=by7QJ8KWKxI18 Aug 2025 17:05 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lwov2cdc7s2hhttps://bsky.app/profile/felixarntz.bsky.social/post/3lv4dl2cbis2cAI Services 0.7.0 is now available! This release adds text-to-speech and speech generation capabilities, as well as web search support to applicable providers. And, for the first time since launch, new providers were added, with Mistral, Perplexity, xAI. https://wordpress.org/plugins/ai-services/29 Jul 2025 14:40 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lv4dl2cbis2chttps://bsky.app/profile/felixarntz.bsky.social/post/3luhk6ctgcc2nTune in this Wednesday to learn more about the latest WordPress Core Performance Team efforts, including the View Transitions plugin! [contains quote post or other embedded content]21 Jul 2025 08:12 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3luhk6ctgcc2nhttps://bsky.app/profile/felixarntz.bsky.social/post/3lu6e2aazks27Looking back at 10 years of contributions to WordPress Core, I feel extremely grateful, but I also feel proud. It made me think about how much giving back to open source can give back to you. I put together some related thoughts and personal stories: https://felix-arntz.me/blog/open-source-contributions-elevate-your-professional-journey/17 Jul 2025 16:28 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lu6e2aazks27https://bsky.app/profile/felixarntz.bsky.social/post/3lu5pj7lc3c2dIf you're curious what the initial priorities of the WordPress AI Team will be, look no further! Several posts were published earlier on the Make AI blog, with this article providing the comprehensive overview of all the building blocks: https://make.wordpress.org/ai/2025/07/17/ai-building-blocks/17 Jul 2025 10:21 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lu5pj7lc3c2dhttps://bsky.app/profile/felixarntz.bsky.social/post/3ltzgewbzyc2aView Transitions 1.1.0 is out! Adding view transitions for WP Admin (opt-in), control over the transition duration, better interoperability with theme support, and compatibility with reduced motion preferences for accessibility. Give it a try: https://wordpress.org/plugins/view-transitions/15 Jul 2025 17:27 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3ltzgewbzyc2ahttps://bsky.app/profile/felixarntz.bsky.social/post/3lsqumph47s2e10 years ago today, I got my first props for contributing to WordPress Core. I've been contributing ever since, and it changed my life in so many ways. Here's 10 valuable lessons learned, which will hopefully help other current and future contributors: https://felix-arntz.me/blog/10-lessons-from-10-years-of-contributing-to-wordpress-core/29 Jun 2025 14:22 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lsqumph47s2ehttps://bsky.app/profile/felixarntz.bsky.social/post/3lsbxferhoc2sIn 24 hours, James LePage, @jeffpaul.com, @swissspidy.bsky.social and myself will be discussing AI and WordPress in a panel as part of the #TheAgencyAdvantage virtual conference. Happening on June 24 at 12pm ET. Join us: https://www.cloudways.com/en/agency-advantage.php23 Jun 2025 16:02 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lsbxferhoc2shttps://bsky.app/profile/felixarntz.bsky.social/post/3lrxo5io7gc2iI recently migrated the ~80 file JavaScript codebase of the AI Services WordPress plugin to TypeScript - a perfect use-case for AI assistance, for such a beneficial yet tedious task. Read more about how using Cline and Gemini sped things up substantially: https://felix-arntz.me/blog/migrating-javascript-codebase-to-typescript-cline-gemini/19 Jun 2025 13:50 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lrxo5io7gc2ihttps://bsky.app/profile/felixarntz.bsky.social/post/3lrvhrk5vns2xComing soon in the View Transitions plugin for WordPress: View transitions for WP Admin! This idea started at the #WCEU Contributor Day, and Mukesh Panchal has been bringing it to fruition. 🎉 Making WP Admin feel like an SPA without it suffering the complexity of being one.18 Jun 2025 16:51 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lrvhrk5vns2xhttps://bsky.app/profile/felixarntz.bsky.social/post/3lrt54igcfs2mNew profile picture (about time)! Thanks to @nilovelez.com for capturing me at #WCEU!17 Jun 2025 18:34 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lrt54igcfs2mhttps://bsky.app/profile/felixarntz.bsky.social/post/3lqth7lczgs2qAre you attending #WCEU #ContributorDay today? At the Core Performance Table, the brand new View Transitions plugin will be a key focus for the day. Help test and get involved! I'd love to see you there. [contains quote post or other embedded content]05 Jun 2025 04:10 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lqth7lczgs2qhttps://bsky.app/profile/felixarntz.bsky.social/post/3lqth6duab22qIntroducing... View Transitions is the latest WordPress plugin from the Core Performance Team, replacing the hard page loads between URLs with smooth animations to improve UX. Previously this required a complex SPA, now it simply works with a plugin. https://felix-arntz.me/blog/introducing-view-transitions-wordpress-plugin/05 Jun 2025 04:09 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lqth6duab22qhttps://bsky.app/profile/felixarntz.bsky.social/post/3lpr6xrw2w22mTwo years ago today, I opened an experimental pull request for a "Speculation Rules" module in the Performance Lab plugin. Little did I know then that it would launch as a key feature of WordPress 6.8 last month. Join me as I share the process behind it: https://felix-arntz.me/blog/speculative-loading-history-performance-feature-in-wordpress-core/22 May 2025 13:12 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lpr6xrw2w22mhttps://bsky.app/profile/felixarntz.bsky.social/post/3loo3fd4tic2aAs a WordPress plugin author, bumping the "Tested Up To" version in the WordPress directory can be tedious, especially if you maintain several plugins. Fortunately you can automate this safely, without risk of deploying other changes. More in this post: https://felix-arntz.me/blog/deploying-your-wordpress-plugins-tested-up-to-version-bump-in-isolation/08 May 2025 14:05 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3loo3fd4tic2ahttps://bsky.app/profile/felixarntz.bsky.social/post/3lnivd7lprs2sAre you considering to use AI in your WordPress plugin? Check out the AI Services plugin documentation to get started with a provider agnostic API that you can use in your own plugin: felixarntz.github.io/ai-services/ 🎓 https://felixarntz.github.io/ai-services/23 Apr 2025 19:08 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lnivd7lprs2shttps://bsky.app/profile/felixarntz.bsky.social/post/3lnfvn6gj5c2zAI Services version 0.6.0 is out! This release adds multimodal output, letting you create both text and images using a single model. Other enhancements include PHP+JS code previews in the AI Playground, and updated support for Chrome's built-in AI. https://wordpress.org/plugins/ai-services/22 Apr 2025 14:35 +0000at://did:plc:rtbrms3lua6blcgk3nryrbrg/app.bsky.feed.post/3lnfvn6gj5c2z