Typed, documented, and on brand

You're extending a task manager app and want to add a utility function that returns the number of completed tasks. You've already set up a copilot-instructions.md file with your team's coding standards.

Then, you type the prompt:

"Write a function that returns the total number of completed tasks."

The image shows the function Copilot generated.

Which custom instruction most likely influenced the way the function was written?