Yann Blazart

@SciamVox @DevoxxFR #Langchain4jCdi. @ehsavoie @antoine_sd carton plein sur le Lab

Si vous voulez rencontrer l'equipe #langchain4j-cdi et pdiscuter d'applications d'entreprise avec l'AI, @yblazart , @antoine_sd et moi-même seront au meet and greet de @DevoxxFR Jeudi m.devoxx.com/events/devoxxf… #langchain4j #genai #java #cdi

@SciamVox langchain4j-cdi is growing !

🚨Breaking: The guy who created Claude Code (@bcherny) just revealed how his team actually trains their AI. One file: CLAUDE.md You place it at the root of your project. Inside it: past mistakes conventions rules Claude reads it every session. The result? The agent improves over time without you touching the code. Every bug that gets fixed becomes a permanent rule. Boris Cherny uses this internally at Anthropic every day. Here’s the template he shared — ready to copy, paste, and adapt. CLAUDE.md Template 1. Plan Mode Default Enter plan mode for any non-trivial task (3+ steps or architectural decisions) If something goes wrong, STOP and re-plan immediately — don’t keep pushing Use plan mode for verification steps, not just building Write detailed specs upfront to reduce ambiguity 2. Subagent Strategy Use subagents frequently to keep the main context window clean Offload research, exploration, and parallel analysis to subagents For complex problems, throw more compute via subagents Assign one task per subagent for focused execution 3. Self-Improvement Loop After any correction from the user, update tasks/lessons.md with the pattern Write rules for yourself to prevent repeating the same mistake Ruthlessly iterate on these lessons until the mistake rate drops Review lessons at the start of each session 4. Verification Before Done Never mark a task complete without proving it works Diff behavior between main and your changes when relevant Ask yourself: “Would a staff engineer approve this?” Run tests, check logs, and demonstrate correctness 5. Demand Elegance (Balanced) For non-trivial changes, ask: “Is there a more elegant solution?” If a fix feels hacky, ask: “Knowing everything I know now, implement the elegant solution.” Skip this for simple fixes — don’t over-engineer Challenge your own work before presenting it 6. Autonomous Bug Fixing When given a bug report: just fix it Use logs, errors, and failing tests to diagnose Require zero context switching from the user Fix failing CI tests automatically Task Management 1. Plan First – Write the plan in tasks/todo.md with checkable items 2. Verify Plan – Confirm the plan before implementation 3. Track Progress – Mark items complete as you go 4. Explain Changes – Provide a high-level summary at each step 5. Document Results – Add a review section to tasks/todo.md 6. Capture Lessons – Update tasks/lessons.md after corrections Core Principles Simplicity First Make every change as simple as possible and minimize code impact. No Laziness Find root causes. Avoid temporary fixes. Maintain senior-level engineering standards.

À partir du 24 avril, GitHub utilisera vos prompts, votre code, le contexte de vos repos et vos interactions Copilot pour entraîner ses modèles IA. Activé par défaut, sans opt-in, ni pop-up : si vous ne faites rien, vos données sont dans la machine. Les repos privés ne sont pas épargnés : GitHub précise que le code n'est pas aspiré en masse, mais dès que vous utilisez Copilot dessus, vos interactions alimentent l'entraînement (le mot "privé" mériterait peut-être un petit astérisque). Les abonnés Business et Enterprise sont exemptés. Ce sont les utilisateurs individuels, ceux qui paient de leur poche donc, qui vont servir de carburant. lesjoiesducode.fr/github-copilot…

@SciamVox @ehsavoie #Langchain4j #Langchain4jCDI #MCP Pleased to annonce I merged the Beta1 of the first full MCP server #CDI #JAXRS, Feel free to test it and then if you can give us some feed-back ! :) Available as a snapshot to test it ! #JakartaEE #MicroProfile

@auritamh Congratulations !!!

I’m truly honored and grateful for being part of the Java Champions community 🙏🤩

You've heard me talk about it at conferences. Finally, we can't wait for you to experience it. LangChain4J CDI 1.0.0 is out, and we can't wait to hear your feedback. Thank you, @yblazart, @ehsavoie, @don_bourne, Arjav Desai, @emilyfhjiang, and everyone who has made it possible.

@ehsavoie @ivar_grimstad @EliteGentleman @edburns @emilyfhjiang @SciamVox @antoine_sd @parisjug @WildFlyAS Just a few ;)

@yblazart @ivar_grimstad @EliteGentleman @edburns @emilyfhjiang @SciamVox @antoine_sd @parisjug @WildFlyAS Yes but we all know @WildFlyAS is the best ;) or maybe I'm a little biased (but just a little) 🤣🤣🤣

@ivar_grimstad Really proud to see you using our langchain4j-cdi module in your presentation! Wish I could have been there tonight. @ehsavoie @EliteGentleman @edburns @emilyfhjiang @SciamVox @antoine_sd @parisjug

@ehsavoie @ivar_grimstad @EliteGentleman @edburns @emilyfhjiang @SciamVox @antoine_sd @parisjug @WildFlyAS Lanchain4j-cdi IS for everybodies : JakartaEE, MP’s, and Even Quakus ;)

@yblazart @ivar_grimstad @EliteGentleman @edburns @emilyfhjiang @SciamVox @antoine_sd @parisjug Nice to see our code demoed even if @WildFlyAS would have been much better @ivar_grimstad ;)

@SciamVox Thanks fr the work @ehsavoie and @EliteGentleman ! We've just released langchain4j-cdi v0.0.3 ! github.com/langchain4j/la…

@FnacVousAide @Fnac très #déçu de votre manque de réactivité suite à un colis à 1200€ "disparue" qui aurait du être livré par coursier dimanche 26... Le service client au téléphone ne sait que répéter de patienter 48-72h et rien n'avance. Pas d'information, rien....

@John_the_Cowboy Leave that ! Come to #Quarkus and join the right side of the force !

@yblazart 🤣 I am using Flyway to fix an issue with SpringBatch, that I am installing in order to fix a bug with an old batch coded in Java 1.3 (with Iterators etc.)...

```FlywayException: Unsupported Database: MySQL 8.0``` Quick fix: in #Gradle, check both jars exist and have *same* version: ``` implementation 'org.flywaydb:flyway-core:11.1.0' implementation 'org.flywaydb:flyway-mysql:11.1.0' ``` #Flyway

Excited to share that I’ve started this week at Sciam! 🎉 Joining superstars like @antoine_sd, @jmdoudoux, @yblazart, and @kanedafromparis to work on some incredible projects. 🚀 sciam.fr

@RivieraDEV @antoine_sd rivieradev.fr/session/229 #RivieraDEV

@RivieraDEV @antoine_sd Hello, pour tous les participants, nous avons fixé les soucis avec Quarkus. github.com/Modilius/micro… dans la branche riviera2024/step010_testQuarkus. L'explication est dans un fichier texte à la racine.

"Au coeur des Buildtime Compatible Extensions de CDI : une nouvelle manière d'étendre Quarkus, Micronaut et toute les implémentations Microprofile, avec un exemple sur LangChain4j" avec @antoine_sd, @yblazart et Pierre Cesmat rivieradev.fr/session/229 #RivieraDEV