Libraries are great, I use a lot of them. Or at least I did use a lot of them...

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SOURCES
https://x.com/GergelyOrosz/status/2010683228961509839
https://github.com/redis/redis/pull/14661
https://simonwillison.net/2025/Nov/17/the-fate-of-small-open-source/
https://www.aihero.dev/a-complete-guide-to-agents-md
https://btca.dev/

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S/O @Ph4seon3 for the awesome edit 🙏

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Theo - t3․gg

AI code generation is fundamentally changing how developers approach dependencies and libraries. Instead of installing packages for common tasks, developers are increasingly using AI to generate custom implementations directly in their codebase. This shift eliminates supply chain risks, reduces dependency bloat, and gives teams full control over their code. Examples include replacing libraries like Tkumi and fast-float with AI-generated alternatives that are simpler to maintain and better integrated. The trend suggests prompts may become the new libraries, with developers sharing prompts instead of packages. This has implications for open source sustainability, as well-documented popular libraries become easier to replace with AI-generated code.

I don’t really use libraries anymore

Pure content bait, no way anyone does that.

You can try to reinvent everything yourself, but it is neither wise nor beneficial in terms of productivity, token cost, and project stability.

Imagine being proud of reinventing the wheel.

So many comments about reinventing the wheel. I would say it’s only partially true.
I’ve seen sooo many codebases, where they had literally libraries for one specific functions. The perfect example is the <code>validate-npm-package-name</code> which was used WIDELY by most of the libs like React/Next and couple of more.
It’s a one file lib, that only validates the npm package name that you assign during the <code>create react app</code> call.