I turned Andrej Karpathy's viral AI coding rant into a system prompt. Paste it into http://
CLAUDE.md and your agent stops making the mistakes he called out. ———————————
SENIOR SOFTWARE ENGINEER
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CODE
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AI Coding Rant as System Prompt
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Using AI for automated code review and testing
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/review is great for reviewing code and if you ask codex to create and run tests after each task it’ll just do it
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Codex incorrectly suggests neural network for classical ML algorithm
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I've been trying to reimplement a very simple *classical* ML algorithm (no, not XGBoost) in a different programming language. I've been using Codex for it. It keeps resorting to writing a *neural network* implementation, even though that approach is several orders of magnitude
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Using AI Agents and Models to Master New Tech Stacks
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my favorite thing to do in these scenarios is to ask codex to look at successful projects using the stack I want to use and help me build skills and agents md accordingly. this helps you emulate best practices quite well!
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OpenAI Launches Vibe Coding Codex App for macOS
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BREAKING 🚨: OpenAI launched a dedicated Vibe coding Codex app for macOS. Codex also supports Skills and automations!
— 🚨 AI News | TestingCatalog (@testingcatalog) 2 février 2026
Everyone is a developer now 👀 https://t.co/Yw1mlpVinL pic.twitter.com/aj3jvZ8EzSBREAKING : OpenAI launched a dedicated Vibe coding Codex app for macOS. Codex also supports Skills and automations! Everyone is a developer now
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Claude Sonnet 5 Leak: Specs and SWE-Bench Score
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vertex AI just leaked "fennec" in an error log claude sonnet 5 reportedly drops tomorrow the rumored specs:
> 50% cheaper than opus 4.5
> still 1M context window but faster
> can spawn parallel sub-agents from terminal
> allegedly hitting 80.9% on SWE-bench the wildest part: -
Claude Sonnet 5 Launch: 1M Context, Cheaper, Best for Agentic Code
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Claude Sonnet 5 sortira très probablement la semaine prochaine ! ↳ 1 million de tokens de contexte
↳ Deux fois moins cher que Opus 4.5
↳ Le meilleur du marché pour le code “agentic” (agents IA qui codent de bout en bout) Anthropic risque de tuer définitivement la -
The Great Leveling Effect: Everyone Becomes a Developer
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Partie 1 :
— Jouhatsu | AI Influence Operator (@Jouhatsu_ai) 2 février 2026
Le grand effet nivelant
« Aujourd’hui, tout le monde est développeur.
⁰Avant, il fallait maîtriser le C++, le Python…
⁰Maintenant, il suffit de parler à l’IA. »
La barrière entre l’idée et l’exécution vient de disparaître.
Chaque créatif devient technique.… pic.twitter.com/oKzoxvPSrkPart 1: The great leveling effect
"Today, everyone is a developer.
Before, you had to master C++, Python…
Now, just talk to the AI."
The barrier between idea and execution has just disappeared. Every creative becomes technical. -
Roblox leverages AI-assisted vibe coding for development
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Roblox has a ton of advantages and is doing some cool stuff with the scene graph centric approach, not to mention leaning into vibe coding https://t.co/Yx9CnBPY7C
— Bilawal Sidhu (@bilawalsidhu) 2 février 2026Roblox has a ton of advantages and is doing some cool stuff with the scene graph centric approach, not to mention leaning into vibe coding
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Codex AI Model Enables High-Velocity Development in Open Source Projects
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100% yes – infact the OSS repo is probably the biggest public case study for using codex at scale across teams and tech stacks surreal to see it enabling teams deliver at such insane rate with confidence