Contributions to ESP-IDF-CXX - fixing bugs, adding features, adding documentation - are welcome! We accept contributions via Github Pull Requests.
Currently, we use the same contribution guidelines as ESP-IDF itself as basis. Please refer to the ESP-IDF Contributions Guide for more information. However, the workflow is quite simplified, we only use github for collaboration. Furthermore, we use the Conventional Commits format for commits. There is an editorconfig file to setup your editor or IDE with some basic options (tab-style, line ending, etc.).
Please also consider the legal part: You will be required to sign the Contributor Agreement for any Pull Request.