My OAS is inside my code so i dont have a yaml file to upload bi directional contracts. How do i then upload the OAS from a CI perspective?

This question would be best asked in #CLS16AVEE as it is regarding bi-directional.

My OAS is inside my code

What do you mean exactly? You should be able to generate a JSON or YAML representation of your OpenAPI depending on the tooling you are using, I would suggest reading your tools documentation. For uploading contracts, once you have the openapi spec, see the instructions here https://docs.pactflow.io/docs/bi-directional-contract-testing/contracts/oas#publishing-the-provider-contract--results-to-pactflow