I have this at the bottom of my AGENTS.md:
You will also add a markdown file to the changelog directory named with the current date and time `date -u +"%Y-%m-%dT%H-%M-%SZ"`, record the prompt, and a brief summary of what changes you made, this should be the same summary you gave the developer in the chat.
From that I get the prompt and the summary for each change. It's not perfect but it at least adds some context around the commit.
How often, in your experience, do people read those auto-generated markdown files? Do you have any empirical data on how useful people find reading other people's agents' auto-generated files?
How often is it the same summary given to the developer in the chat?
Isn’t the commit message a better place to add what and why? You might need to feed some info that the agent doesn’t have access to “we are developing feature X this change will such and such to blah blah”. The agent will write a pretty good commit message most of the times. Why do you need a markdown file? Are releasing new versions of the software for third parties?