How Codex is built (14 minute read)
Codex, OpenAI's multi-agent coding assistant, has seen a 5x usage increase since January. It now writes over 90% of its own code and is transforming software engineering practices at OpenAI.

Builders 🔧 | 2026-03-31
1,300+ news scanned → ~210 analyzed → 14 selected
Codex, OpenAI's multi-agent coding assistant, has seen a 5x usage increase since January. It now writes over 90% of its own code and is transforming software engineering practices at OpenAI.
Mitchell Hashimoto, co-founder of HashiCorp, shares how AI tools have transformed his day-to-day workflow, impacting software engineering and infrastructure management.
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By default, Vercel automatically determines the right command for installing your project's code dependencies in the Build Step based on the Framework Preset configured for your project and the presence of certain files (like package-lock.json) in...
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Mercury, a fintech company, has a 2-million-line Haskell codebase that has scaled well despite rapid growth, demonstrating Haskell's production-ready capabilities.
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