Is there a detailed flowchart for GitHub and Buildkite interactions?

[nileTestNet]

I want to use Buildkite as a CI tool integrated with my GitHub repository. However, I'm not familiar with their interaction workflow and I'm concerned about potential security risks. Is there a detailed interaction flowchart available? It should include token management, the calling process, result reporting, etc. The attached screenshot shows a simple flowchart I drew myself - does it have any issues? Is it actually how Buildkite and GitHub interact in reality?

[daxinzang1]

Same question. I also couldn't find any detailed flowcharts explaining the interaction principles between Buildkite and GitHub in the official documentation. I only saw this webpage(https://buildkite.com/docs/pipelines/source-control/github) showing how to configure GitHub project integration with Buildkite, but it doesn't clarify the actual interaction logic.