Without TraceLayer
A working copy can sit on your computer while the live page changes somewhere else. When the working copy is later published, it can accidentally erase newer work.
TraceLayer checks what is live before it prepares an update.
This is the server source-of-truth model in plain language: the live site is treated as current. Your local working copy is useful, but it is not allowed to overwrite newer server content without review.
Conflict Review
Fetchlatest live version
Comparelocal working copy
Flagserver changed
Reviewbefore write
Why this matters
With TraceLayer
TraceLayer checks the live page again before a write. If the server changed, the update is blocked until you review the difference.
What gets tracked
Site and content type
Which website, page, post, or target the working copy belongs to.
Server checksum
A compact fingerprint of the last live version TraceLayer checked.
Local change time
When the working copy was last edited or saved.
Dry-run result
The review output that explains what would happen before approval.