@upsundotcom CTO @Symfony founder and project lead

Paris, France
Joined June 2008
Fabien Potencier retweeted
Just merged support for Jev into symfony/ai - from now on that mono repo gets split into exactly 100 packages. We added way more: support for Higgsfield, Together AI, Fireworks, Venice, and next up Eden AI. And support for async jobs/batch and agents using tools of MCP servers.
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Fabien Potencier retweeted
Replying to @fabpot
I'm already really enjoying using and testing it. It's a highly useful tool and a massive DX improvement. – at Bolivia
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I cannot believe I've just said the following to my agent: "Based on your experience, make me recommendations on..."
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😀 #Symfony Language Tools feedback: "We maintain a 15-year-old multi-tenant Symfony ERP. It surfaced hundreds of real issues for us: translation keys that silently fall back to their literal key, casing mismatches, a route to a bundle deleted 2 years ago, placeholder mistakes."
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New version of the #Symfony LSP server has just been released: Windows support fixed, much faster indexing, and a bunch of other bugs fixed. Keep reporting problems, my agent is ready to fix them all 😆
🚀 Symfony Language Tools is here! The official Symfony LSP server is now available, bringing framework autocompletion, diagnostics, hover info, and navigation directly to VS Code, Neovim, and any LSP compatible editor. Key highlights: 🎯 Covers Routing, Twig, DI, Translations, Security, Doctrine, and more ⚡ Boots your kernel for zero false positives 🤖 Built and reviewed with advanced AI models, backed by an extensive test suite Try the beta: search "Symfony Language Tools" in VS Code! 🛠️✨ symfony.com/blog/announcing-…
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Fabien Potencier retweeted
Small vacation project: a #Symfony LSP server. To be announced next Monday, but just for you, here is the GitHub repo: github.com/symfony/language-… and the link for the VS Code native integration: marketplace.visualstudio.com… Yes, heavily written by LLMs :)
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Fabien Potencier retweeted
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 today, we're introducing Upsun Dispatch. 🚀 Workflow is the primitive, not the agent. Launching September 2026. 👉 Read the full story: upsun.com/blog/introducing-u… #UpsunDispatch #AIEngineering #SDLC
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Great teaser for the upcoming #PHP documentary. Super happy to be part of it. #symfony
We just dropped a little teaser for an upcoming film... The film tells the story of PHP, a language that was never meant to become what it is today, told by the people who shaped it. Expect the full film later this year. youtu.be/4W4y46WVdCU Featuring: Nils Adermann (Composer) @naderman Taylor Otwell (Laravel) @taylorotwell @laravelphp Nikita Popov (PHP Core) @nikita_ppv Fabien Potencier (Symfony) @fabpot @symfony Roman Pronskiy (The PHP Foundation) @pronskiy @ThePHPF Brent Roose (JetBrains) @brendt_gd @phpstorm @jetbrains ....and more.... @jetbrains is supporting us to make this film. Thanks to the team there!
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Nowadays I barely write code without an LLM, and my OSS productivity has gone through the roof. Look at what I've shipped on #Twig lately (more to come). Steve Yegge's 8 levels of AI-assisted development described my last 2 years exactly.
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Fabien Potencier retweeted
Most engineering teams already use AI. The real gap is whether the whole org is moving together. @fabpot maps 8 stages of AI maturity, from leadership silence to autonomous agents. See where your team stands 👉 upsun.com/blog/8-stages-ai-e…
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Fabien Potencier retweeted
🔒An update on Composer & Packagist supply chain security: what's in place, what ships this week with Composer 2.10 (dependency policies, immutable versions), and what comes next. If you maintain PHP packages, enable MFA now! #php #phpc #composerphp
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Fabien Potencier retweeted
CVEs have not been issued yet unfortunately. Waiting for them to start the release cycle.
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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.
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CVEs have not been issued yet unfortunately. Waiting for them to start the release cycle.
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