Hi Artem,
you might be looking for the section Contributing an official pipe on How to write a pipe for Bitbucket Pipelines:
You can submit your pipe to be considered for our official list - make sure you've done it in the complete way if you do!
Have a look at the full details of how to contribute a pipe.
Check the "how to contribute a pipe" link, in the end it is filing a pull-request.
Is this the kind of information you're looking for?
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