Deciding when to RFC is difficult

You should write an RFC if you:

• are building something from scratch. New endpoint, component, system, library, application, etc.
• the need rewrite has crossed your mind
• will impact more than one system or other team members.
• would like to define a contract or interface between clients or systems.
• are adding a new dependency.
• are adding or replacing languages or tools to the stack
• are in doubt of whether you should write one