FileMapper lets you rename files and folders inside the generated archive without touching the objects in S3. It is a JSON object stored in your bucket that maps original names to new names:
{
"photos": "vacation-2026",
"report-draft.pdf": "report-final.pdf"
}When the job runs, prefix matches are applied as the entries are written, so a folder can be renamed and files can be renamed individually. Pass the file's location the same way you pass file paths (bucket-relative key).
The mapping file is read at zip time, so you can keep different mappings per client or per project.