Because this is a personal set of repositories with only occasional chiming in by others, it'd be silly to go all formal.
I shall endeavour to listen to any concerns about my behaviour, and expect the same from you (and likewise in interactions between others who interact with or through https://github.com/danielfdickinson).
I also expect of myself, and participants a proactive effort to 'behave well' towards each other. If you need examples of what that means, there are plenty of formal codes of conduct (for example the Contributor Covenant). You can also read the opensource.guide information on codes of conduct
If there is a problem that you feel needs my attention, please use my published email address and I will make an effort to learn more about the situation, and take appropriate actions. (Also note that I may take actions proactively if I become aware of a situation on my own).
Such actions may include seeking to communicate with all parties (in a case that is not clear cut), temporarily or permanently lock discussion or comments, or block one or more users (if needed) (for direct participants).
For an indirect participant (e.g. a sponsor) the steps taken would be taken in conjunction with available solutions and applicable third parties (e.g. GitHub), assuming of course simple communication is not enough.
If you are having problems with me, or feel I am not doing enough, and you are unsatisfied by my efforts around them, please let me know. If the results are unsatisfactory, you probably will need to contact GitHub Support as there is this is the account of an individual not an organization, so there are no organizational supports to draw on.