Order of operations for `transform` and custom keywords

I understand that standard keywords, such as `format` will be run before any custom keywords, such as `transform`. So if we want to transform a string BEFORE validating its format, we have to use `$allOf` to force the order.

In my case, we're considering using `transform` to turn a proprietary version number format into something close to a semver, then using the `semver` keyword from the [`ajv-semver`](https://www.npmjs.com/package/ajv-semver) to validate and clean up the coercion.

What would determine the order?
- The order the keywords are added to `ajv`
- The order the keywords appear in the JSONSchema

Can we count on the order?