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llms.txt v2 is out — here's what actually changed

This story is from 2026-09-18. It is preserved in the archive; the latest stories are on the live feed.

The llms.txt proposal was quietly revised in August 2026, nearly two years after the original. If you already publish an llms.txt , the good news is short: the file format didn't change. A v1 file is still a valid v2 file. Nothing to migrate. What changed is everything around the file — how agents…

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  1. 2026-09-18 20:30 · DEV Community — AI
    llms.txt v2 is out — here's what actually changed

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