After an evening of changing network settings, it’s easy to remember the fix and forget the two changes that came before it. A short log makes it easier to reconstruct what happened when a service breaks days later.

Keep the entry small

Start with the date and the system you touched. Write what changed, how you verified it, and what you would reverse if it caused trouble. A sample entry might read like this.

Moved the test web app behind the reverse proxy. Confirmed the homepage and one static asset over HTTPS from a second network. The previous proxy configuration is saved with the project’s configuration history.

Include details that will help your future self, such as a config path or an affected port. Keep passwords and tokens out of the log. A plain Markdown file is enough. The value comes from writing the entry while the change is fresh and being able to find it when you need it.