A form that edits a file you can't see is a trust gap — the whole point of these files is their exact on-disk bytes.

XFilePreview renders the REAL text/XML for any kind + model, using the same render logic as the fancy-x-files PHP / Node packages — what you see is what ships. Filename header comes from X_FILE_META.

Drop it next to any editor with the same model: <XFilePreview kind="robots" model={model} />. Read-only; no state of its own.