Fabien Potencier

Two critical PHP vulnerabilities were fixed on October 21. Here is what Upsun is doing to help our customers. Follow rollout updates on Upsun’s status page: status.upsun.com/incidents/2c.... Read the rollout details, the version table, and what to check: developer.upsun.com/posts/releas...

Small vacation project: a #Symfony LSP server. To be announced next Monday, but just for you, here is the GitHub repo: github.com/symfony/lang... and the link for the VS Code native integration: marketplace.visualstudio.com/items?itemNa... Yes, heavily written by LLMs :)

AI made engineers faster. It didn't make teams faster. The constraint was never typing; it was everything around it. The SDLC is being rewritten, and we'd like to rewrite it with you. That's why we're introducing Upsun Dispatch. 🚀 Launching September 2026 👉 Read the story: upsun.com/blog/introdu...

Great teaser for the upcoming #PHP documentary. Super happy to be part of it. #symfony

Nowadays I barely write code without an LLM, and my OSS contribs has gone through the roof. Look at #Twig. Steve Yegge's 8 levels of AI-assisted development described my last 2 years exactly. But at the org level, challenges are different. So I tried to map an org scale: upsun.com/blog/8-stage...

Most engineering teams already use AI. The real gap is whether the whole org is moving together. @fabien.potencier.org maps 8 stages of AI maturity, from leadership silence to autonomous agents. See where your team stands 👉 upsun.com/blog/8-stage...

As an OSS maintainer, my new rule is that anything a frontier model can find with some reasonable effort is a 0-day. Hence why I'm now shipping security releases on public holidays.

During the last few weeks, the #Symfony core team has been hard at work fixing a long list of vulnerabilities for both #Symfony and #Twig. Today, we're publishing that work in the biggest security patch releases ever. Bare with us and wish us luck 🍀

🔥 On démarre la journée à #Symfony_Live Paris 2026 ! Fabien Potencier, @fabpot ouvre le bal avec “Concevoir des TUI en PHP” 💻✨ TUI, Symfony Terminal, et même une PR en live 👀🚀 Let’s go Paris! 🇫🇷🔥 #Symfony #PHP #TechEvent

💻 Pour cette édition #Symfony_Live Paris 2026, Fabien Potencier (@fabpot) enchaîne deux talks ! ⚡ Cette session : "Développer un Coding Agent en PHP : dans les coulisses du "Harness"” ! #PHP #Symfony #TechEvent

My favorite activity when coding: remove code My new favorite activity with my coding agents: let them remove code they generated 😂 Also, I like removing cruft from AGENTS.md or SKILLS.md files Writing code is also about removing code 😀

🤖Fabien Potencier: Keynote à #Symfony_Live Paris 2026 ! “Développer un Coding Agent en PHP : dans les coulisses du 'Harness'” Rendez-vous le 26 mars ! 👀✨ #Symfony #PHP #IA #CodingAgent https://symfony.com/blog/symfonylive-paris-2026-developper-un-coding-agent-en-php-dans-les-coulisses-du-harness

I like when both the agent and me think the same at about the same time. I was about to send it a steer message saying "Stop over-engineer the solutions" when it "thought" the same "Let me undo my overengineered approach and keep it simple. The original ..."

Hardening Symfony: Recent Security Improvements ➡️ https://symfony.com/blog/hardening-symfony-recent-security-improvements

Join #Symfony in London, UK! 💻✨💂 A #MeetUp with great talks, tips from the Core Team, and Symfony community 🙌 🎤 On stage: ➡️Nicolas Grekas: “A Year of Symfony!” 🚀 ➡️Yannick Chenot: “Escaping the Code Maze” 🧩 📍WeWork, 90 York Way, London N1 (Floor 7) 🎟️Tickets: www.meetup.com/symfony/even... #PHP

2026 might be the year every developer wants to build their own agent (coding, personal, ...). A bit like frameworks 10/15 years ago. Great learning exercise and highly recommend as a weekend project.

2025: LLMs augments Fabien's ability to deliver better and faster 💪 2026: Fabien augments LLMs to help them do a better job 🏃 2027: Is Fabien still needed? 😱

🌟 Symfony AI v0.1.0 - First Tagged Release ➡️ https://symfony.com/blog/symfony-ai-v0-1-0-first-tagged-release

I had to work hard to help Claude do a good job, but apparently, it enjoyed the experience 🤣 "This has been a great collaborative optimization session - each suggestion made the code cleaner and more efficient. Thanks for the excellent insights!"

wouterj.nl/2025/12/symfony-20-year To celebrate 20 years of Symfony, I've crunched a bunch of numbers and share some memories of Symfony development since the 2.0 release in 2011.

🎥 Enjoy Christopher Hertel's talk for FREE! Christopher Hertel breaks down practical, real-world AI in “Symfony AI in Action”. Watch now! + All Replays are available now too! #Symfony #PHP #AI #SymfonyCon https://symfony.com/blog/symfonycon-amsterdam-2025-free-replay-where

This morning, I woke up energized and eager to code. Two years ago, I presented a Terminal component at #SymfonyCon, but never published it due to its flawed design. I've now started over with a better plan to address these challenges. Let's see how far I can go. #symfony

Today, at SymfonyCon, we're celebrating 20 years of #Symfony in Amsterdam! Thank you all for your support.

Symfony 7.4 brings a cleaner way to define console inputs: command arguments and options can now be mapped directly to PHP classes and enums using attributes like `#[MapInput]`, `#[Argument]`, and `#[Option]`. Type-safe, structured input for your CLI commands 🎉🍕🥓 #Symfony #PHP #DX

🎉 Something epic is coming for Symfony’s 20th anniversary… 📖 A comic book telling the story of Symfony, 20 years in the making, like never before. Can you guess what it is? #Symfony #DevCommunity #PHP

I will be speaking at @dotaiconf next week. You can still secure your seat. Use the SPEAKER15 promo code to get 15% off 😉

20 years ago, #Symfony was publicly released as a #PHP Open-Source project. Thank you all for your support along the years.

This week, Symfony proudly celebrates 20 incredible years of innovation, friendship, and open-source passion — we’ve created a special page to relive the memories and thank everyone who made this journey possible: symfony.com/20years 🫶 https://symfony.com/blog/celebrating-20-years-of-symfony

#SymfonyCon Amsterdam 2025: Regular tickets end this Wednesday — secure your seat before prices go up! ⏳ Join us for 4 days of talks, workshops, and community vibes! Grab your ticket now 👉 https://symfony.com/blog/symfonycon-amsterdam-2025-regular-tickets-ends-wednesday

🎉 We are very excited and proud to announce that today, Platform.sh officially becomes Upsun, the cloud application platform humans and robots love 🎉 bit.ly/46ArX8S #Upsun #News #TechNews

Back from the #APIPlatformCon in Lille. Great vibes there! Here is my talk slides: How AI agents are changing the way we should build APIs: speakerdeck.com/fabpot/how-a...

🙌 Symfony to Provide the Official MCP SDK ➡️ https://symfony.com/blog/symfony-to-provide-the-official-mcp-sdk

This is a sad day for the entire #symfony community. My thoughts and love are with Leann and Beckett.

📢 The #SymfonyCon Amsterdam 2025 workshop lineup is live! 🔥 2 days with top Symfony experts! 📅 Nov 25–26 🎟️ Save your spot now: https://live.symfony.com/2025-amsterdam-con/workshop https://symfony.com/blog/symfonycon-amsterdam-2025-level-up-your-skills-with-our-workshops

Join our first #Symfony #AI hackathon!

👾 Code. Collaborate. Contribute. Join us in Amsterdam on Nov 29 for Symfony Hackday! We’ll onboard newcomers, work on the roadmap, and strengthen the community 💪 Don’t miss it! https://symfony.com/blog/symfonycon-amsterdam-2025-join-the-symfony-hackathon-collaborate-contribute-create

🎉 SymfonyCon Amsterdam 2025 is coming! All practical info : venue, schedule, travel, and more, is now available. 📥 Get it here or in the QR code below: 👉 live.symfony.com/2025-amsterd... Can’t wait to see you there! 🧡 #SymfonyCon #SymfonyConAmsterdam2025

If you want to help a big open source project form the beginning. Have a look here. Symfony AI just became public with a lot of cool stuff but it is a bit rough on the edges. Help us make it shine in the next few weeks

🚀 Kicking off the Symfony AI Initiative ➡️ https://symfony.com/blog/kicking-off-the-symfony-ai-initiative

This is one of the best release notes I've read this year. github.com/PHP-CS-Fixer... Congratulations to the release of PHP 8.4 support <3

⏳ Call for Papers still open! This is your Chance to Speak at SymfonyCon Amsterdam 2025! 📅 Deadline: July 16, 2025 📝 Submit your talk or workshop now, we want to hear from you! 🙌 New to speaking? Our mentoring program is here to help. 💼 Travel, hotel & speaker gift! #SymfonyCon

Building multistep forms with Symfony FormFlow will be easier, more flexible, and DX-first. Directly integrated into the Form component! Here’s the Symfony 7.4 PR: github.com/symfony/symf... Want to try it out? Play with the demo app 👇 github.com/yceruto/form... #Symfony #PHP #DX #FormFlow

🌟 Symfony 7.3 curated new features ➡️ https://symfony.com/blog/symfony-7-3-curated-new-features

🎉 We're proud to announce that @fabien.potencier.org has been appointed Chief Technology Officer at Platform.sh, succeeding co-founder @damientournoud.bsky.social 🎉 Read the full announcement here 👉 brnw.ch/21wSE2T

🚀 New in Symfony 7.3: JsonPath Component ➡️ https://symfony.com/blog/new-in-symfony-7-3-jsonpath-component

Like always @blackfire.io helped a lot measuring the impact of the new @symfony.com JsonStreamer component! Serialization's share of the total request fell from 83% to 45% thanks to streaming – achieving an awesome 70% time saving and 50% memory reduction!

Introducing A Streaming AMQP Transport for Symfony Messenger ➡️ https://symfony.com/blog/introducing-a-streaming-amqp-transport-for-symfony-messenger

SymfonyDay Chicago is starting! SO many people have come to nerd out about Symfony and support us. It’s crazy! ❤️