When several files are edited in a single turn and their accumulated diff snippets would blow past the per-turn budget (16384 chars), later files are now omitted from the in-prompt diff. The model sees:
> Note: <filename> was modified, either by the user or by a linter. ... The diff was omitted because other modified files in this turn already exceeded the snippet budget; use the Read tool if you need the current content.
This trades extra Read calls for predictable context usage.
Evidence
Snippet budget (search for "The diff was omitted because other modified files in this turn already exceeded the snippet budget").
Strings lifted out of the shipped bundle, so the claim above can be checked against them.