Direct answer
OKF vs llms.txt
llms.txt is a discovery file that points AI systems to important site content. OKF is a knowledge package: a directory of typed Markdown concept files with metadata, summaries, indexes, links, and validation. A site can use llms.txt for discovery and OKF bundles for deeper retrieval.
Use both when useful
A site can expose llms.txt for discovery and OKF bundles for deeper structured retrieval.
The key difference
llms.txt points to content. OKF carries the content in a format built for retrieval and reuse.
FAQ
Should a site use OKF or llms.txt?
Use both when useful. llms.txt helps discovery by pointing at key pages, while OKF packages the actual knowledge into structured files.
Is llms.txt a replacement for structured knowledge?
No. llms.txt is a useful map, but it does not by itself validate metadata, split concepts, or package a full knowledge bundle.
Sources
Next step
Use OKFConverter to generate a structured bundle, then run the validator before giving the files to an AI agent, support bot, internal search system, or retrieval pipeline.