changes.create()

import base64
from mesa_sdk import FileDelete, FileUpsert

change = await mesa.changes.create(
    repo="app",
    base_change_id="zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz",
    message="Add README",
    authors=[{"name": "Docs Bot", "email": "docs@example.com"}],
    files=[
        FileUpsert(
            path="README.md",
            content=base64.b64encode(b"# App\n").decode(),
        ),
        FileDelete(path="old.txt"),
    ],
)