Function apply_patch_file 

pub fn apply_patch_file(
    patch_text: &str,
    cwd: &Path,
    mode: ApplyMode,
    guard: Option<&PathGuard>,
) -> Result<Vec<EditResult>>

Apply a multi-file patch. Returns one EditResult per affected file.

Retains direct implementation since it produces multiple EditResults (one per file), which the single-op execute_as_edit_result adapter doesn’t support.

Atomic Apply: all files are load+hunk preflighted first; on Apply a single backup session covers every path. Any write failure restores the whole batch (no half-applied multi-file patch). Empty-create dests report changed: true even when original and new content are both empty.

Deletes: empty-hunk +++ /dev/null (git deleted file mode, no hunks) unlinks. A hunked delete applies the minus lines first; leftover bytes rewrite the file (preview --diff or new_content). Path-only unlink is file.delete. Stale minus lines are ambiguous and the file stays. A missing dest peels not_found on Apply and Check (do not treat it as changed: true).