What is llms.txt, and does your store need one?
llms.txt is an emerging standard for telling AI assistants what is on your site. Here is what it does, what goes in it, and whether it is worth adding.
You already know robots.txt: a file at your domain root that tells search crawlers where they can go. llms.txt is the same idea aimed at AI. It is a plain text file at yourstore.com/llms.txt that tells language-model assistants what your site is, what matters on it, and what is shoppable.
It is new, and almost no stores have one yet. That is exactly why it is worth knowing about: it is a cheap way to be more readable than competitors who have not caught up.
What goes in it
There is no bloated spec to learn. A useful llms.txt for a store is short and human readable:
# Your Store
> Midweight merino and everyday basics, shipped from Portland.
## Shop
- [Sweaters](https://yourstore.com/collections/sweaters)
- [Shirts](https://yourstore.com/collections/shirts)
## Policies
- Free returns within 30 days
- Ships to US, CA, AU
## Contact
- support@yourstore.comThe goal is not to game anything. It is to hand an assistant a clean summary instead of making it infer everything from your raw pages.
Does it actually help?
Adoption is early, so treat it as an edge, not a silver bullet. The signals that move the needle most are still on-page: Product schema, a readable price, and crawlable content. An llms.txt sits on top of those. It will not rescue a store an assistant cannot read, but on a store that is already in decent shape it is a low-effort way to guide assistants toward your best pages and your policies.
How to add one
Create a file named llms.txt, fill it with the structure above, and upload it to your site root so it is served at yourstore.com/llms.txt. On Shopify you can host it through your files or a small app or snippet. Then confirm it loads in a browser.
Before you spend time on it, it is worth checking whether llms.txt is even your weak point, or whether something more basic like missing Product schema is costing you the sale. ShelfGrader grades a store page free in about a minute and ranks the gaps so you fix the heaviest one first.
Frequently asked questions
Do any AI assistants actually read llms.txt yet?
Honestly, adoption is still early and patchy. Some AI tools and crawlers look for llms.txt, but no major assistant has committed to it as a ranking signal, so treat it as a low-cost edge rather than a guarantee. The heavier signals, Product schema and a machine-readable price, do more for your visibility. llms.txt is worth adding once those are handled, not instead of them.
How do I add llms.txt to Shopify?
Create a plain text file named llms.txt with a short summary of your store and links to your key pages and policies, then host it so it serves at yourstore.com/llms.txt. On Shopify you can add it through your files or a small app or snippet. Confirm it loads in a browser at the root path.
Is llms.txt the same as robots.txt?
They share the idea of a root text file that guides automated visitors, but they do different jobs. robots.txt tells search crawlers where they may go. llms.txt hands AI assistants a clean summary of what your site is and what matters on it. One controls access; the other offers a readable map.