The flowcharts provide a high level overview of the WebdriverIO ecosystem and how the different packages interact with each other.
WDIO Commands - Explains the wdio config, install and repl command workflows.
Create local worker process - Explains the interaction between the @wdio/cli, @wdio/local-runner and @wdio/runner packages and how a worker process is created.
Test execution - Overview of how the tests are run in the local runner worker process.
High level overview - Flow chart provides a high level overview of how the WebdriverIO ecosystem interacts with the core packages.