One thread
Email or the contact form thread, per project. Every decision lands in the same place, searchable later by both sides.
Files
A single shared folder with a dated structure. No hunting through message history for the third version of a logo.
What we avoid
Five overlapping tools where the real decision is in whichever one you were not looking at. If your organisation mandates a specific platform, tell us at scope stage and we will work inside it.
Meetings
Booked, short, and followed by a written summary. If a meeting produces no decision, the summary says so.