The repeatable half of the work should not need a language model.
Most catalog problems are structural: a missing unit in the title, a specification that lives in a metafield and never reaches the page, a brand field left empty on one supplier. Rules fix those deterministically, across thousands of products, for nothing.
A model is the wrong tool for a find and replace.
Sending every product through a model to add a size to a title is slow, expensive and unpredictable. A rule states the condition and the transform, previews itself against the products it would match, and produces the same output every time it runs.
Write it once, preview it, then let it hold the line.
Conditions on the fields you already have
Product type, vendor, tags, collection membership, metafields, locale and the current value of any field. Conditions combine with and and or.
Transforms that stay readable
Append, prepend, replace, template from metafields, map a value table, or write a field only when it is empty. The rule reads like a sentence, not a script.
A preview before anything moves
Every rule shows the products it matches and the exact output on each one. A rule with no matches says so instead of running silently.
Ongoing, not one time
Once a rule is on, new and updated products are checked against it, so the same gap does not reopen the next time you import a supplier feed.
Six rules holding a 1,400 product catalog level.
Each rule shows its condition, how many products it currently matches and whether it is live. The preview strip at the bottom is what a rule looks like before you turn it on.
Rules are free. Writing them, previewing them and running them across the whole catalog costs no credits on any tier, now and permanently, because the work is deterministic.
A rule does exactly what it says and nothing more. It does not judge whether the resulting sentence reads well, which is why prose rewrites are a separate, credit metered capability you approve individually.
See this on your own catalog.
The free check reads a representative sample of your product pages and returns the score in about a minute. No account, no card.