devsune/readme/FunctionCalling.md

Sune function call (have Sunes attach files to their latest bubble)

In your Sune script, call:

await window.suneAttach(files, { toAPI: false, tree: true })

files can be File objects or simple objects like:

{ name: 'report.pdf', mime: 'application/pdf', data: '<BASE64>', size: 123456 }

toAPI: true adds an assistant message containing the actual file parts (so the API can consume them next turn).

tree: true adds the separate Attachments tree bubble with clickable downloads.

Examples:

await window.suneAttach([fileInput.files[0]])
await window.suneAttach([{name:'cat.png',mime:'image/png',data:'<BASE64>'}])

If you want only the tree bubble and not re-send data to the API, set {toAPI:false, tree:true}.