Config Warning
This module displays a warning on admin forms that can change site configuration, helping prevent accidental alterations. You can enable or disable the warning and customize its message from a configuration page.
Provides a configurable warning on admin forms that are likely to alter the running configuration of the site.
Features
You are able to enabled/disable the warning for periods when you are actively developing and alter the text to include, maybe, team policies around config changes.
Post-Installation
Once installed, a config page is created at admin/config/development/config-warning and you can set/enable the message there. The message is disabled by default.
Similar projects
The Configuration Override Warn module does far more but, as they say, installing that on production might be unwise.