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Cosimo Matteini

@cosimomatteini.com
65 followers 375 following 2 posts

Software developer. Experiments, automates, and builds things for fun. cosimomatteini.com

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Reposted by Cosimo Matteini
Effect | TypeScript for the AI Era @effect-ts.bsky.social · 01/10/2026
Effect v4 is here. One ecosystem. Zero dependencies. The next chapter of Effect and the foundation for building reliable software and AI agents in TypeScript. Read the full announcement below: effect.website/blog/release...
Effect 4.0 stable release announcement on a dark background. Large white “4.0” above “Production-ready. Out now.”  A timeline along the bottom progresses from 3.0 Stable to 4.0 RC to 4.0 Stable.
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Reposted by Cosimo Matteini
Socket @socket.dev · 01/04/2026
🧨 Axios only needed to be resolved somewhere in your dependency graph to affect you. Semver + transitive deps + runtime installs = hidden blast radius. If you only checked your project’s lockfile, you may still not know. socket.dev/blog/hidden-... #nodejs #javascript
socket.dev
The Hidden Blast Radius of the Axios Compromise - Socket
The Axios compromise shows how time-dependent dependency resolution makes exposure harder to detect and contain.
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Reposted by Cosimo Matteini
Effect | TypeScript for the AI Era @effect-ts.bsky.social · 18/02/2026
Today, we launched Effect v4 beta 🚀 Rewritten runtime. Smaller bundles. Unified package system. Performance: v4 is faster and lighter than v3 across the board. Rewritten runtime: lower memory overhead, faster execution, simpler internals. Full announcement: effect.website/blog/release...
github.com
GitHub - Effect-TS/effect-smol: Core libraries and experimental work for Effect v4
Core libraries and experimental work for Effect v4 - Effect-TS/effect-smol
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Reposted by Cosimo Matteini
doubleloop @doubleloop.io · 11/02/2026
Guido Martini entra come nuovo socio di doubleloop. Dopo anni come board advisor, è un’evoluzione naturale del percorso fatto insieme. Rafforziamo il board e la nostra direzione: costruire un’azienda di prodotto end-to-end, unendo strategia, design e sviluppo. Benvenuto a bordo, Guido 🚀
Matteo, Andrea, Guido e Massimo. I soci di doubleloopGuido presenta la sessione "UX and UI principles for devs"Guido in montagna con la felpa doubleloopGuido conduce una sessione alla unconference SoCraTes Italia
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Reposted by Cosimo Matteini
doubleloop @doubleloop.io · 09/02/2026
Vi siete persi @cosimomatteini.com mentre esegue il kata "from Imperative to Functional Programming" con Effect? Nessun problema: ecco il talk completo: 🎥 Talk: www.youtube.com/watch?v=XvDY... 💻 Repo: github.com/devmatteini/... Un ottimo esempio di refactoring passo dopo passo.
youtube.com
Imperative to Functional Programming Kata
YouTube video by Ticino Software Craft
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Reposted by Cosimo Matteini
doubleloop @doubleloop.io · 28/03/2025
Last week, we attended #EffectDays: 3 days of 🧑‍💻 workshops, 🎙️talks, and 🤝 exchanges with a passionate community. We shared our 💻 effect-mongodb library (tinyurl.com/mubt33xv). Big thanks to @effect-ts.bsky.social, the speakers, and everyone we connected with! 🙏 #Community #ContinuousImprovement
github.com
GitHub - doubleloop-io/effect-mongodb: A MongoDB toolkit for Effect
A MongoDB toolkit for Effect. Contribute to doubleloop-io/effect-mongodb development by creating an account on GitHub.
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Cosimo Matteini @cosimomatteini.com · 23/03/2025
Just spent 3 amazing days at the second edition of #EffectDays @effect-ts.bsky.social! Great talks and even better conversations with the community, so many new ideas to explore! Can't wait to try Effect 4.0, its performance improvements and smaller bundle size look incredible 🚀
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Reposted by Cosimo Matteini
mbarto.bsky.social @mbarto.bsky.social · 22/01/2025
My talk from @reactdayberlin.gitnation.org has been published. If you want to know how I learned some of the RSC internals and what does RSC really mean, after all, you can find it here: gitnation.com/contents/mee...
gitnation.com
Meet React Flight and Become a RSC Expert by Mauro Bartolomeoli
My name is Mauro and I work for a company called Doubleloop in Italy. Today, I'm going to share my learning journey through puzzles and challenges related to React Server Components (RSC). RSC allows ...
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Reposted by Cosimo Matteini
doubleloop @doubleloop.io · 17/01/2025
We’ve been using #TypeScript library @effect-ts.bsky.social in production for a couple of years with great satisfaction. @venomav.bsky.social and @cosimomatteini.com have developed an open-source library to simplify and enhance the integration of #MongoDB with Effect. github.com/doubleloop-i...
github.com
GitHub - doubleloop-io/effect-mongodb: A MongoDB toolkit for Effect
A MongoDB toolkit for Effect. Contribute to doubleloop-io/effect-mongodb development by creating an account on GitHub.
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Cosimo Matteini @cosimomatteini.com · 04/01/2025
I've been experimenting with #Ubuntu autoinstall to automate the installation of Ubuntu Desktop. Combined with my #dotfiles bootstrap script, I can set up a new development environment in under 30 minutes. If that sounds interesting to you, check out my blog post cosimomatteini.com/blog/automat...
cosimomatteini.com
Automate Ubuntu Desktop installation | cosimomatteini.com
Automate Ubuntu Desktop installation to quickly set up a new environment with Ubuntu autoinstall format file
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