// The Three Patterns
01 Current Version of a Working File
XXX_File Description vCurrent
XXX Reference code
File Description Somewhat detailed description of file
vCurrent Version reference
02 Snapshot of Current Version of a Working File
XXX_File Description vCurrent_yyyymmdd
XXX Reference code
File Description Somewhat detailed description of file
vCurrent Version reference
yyyymmdd Date
03 Specific Version of a File
XXX_File Description vX_yyyymmdd
XXX Reference code
File Description Somewhat detailed description of file
vX Version number or description
yyyymmdd Date
// How to Read It

Use vCurrent for the file people should always open and keep editing. Take a _yyyymmdd snapshot when you want a frozen copy of that current version as of a date.

Use vX (e.g. v1, v2, or a short label) with a date for a specific, finalized version you intend to keep and refer back to.

Dates are always yyyymmdd — e.g. 20260721 — so files sort chronologically by name.