```python
"""Select fictional campaign proposals in input order."""


def plan(rows, budget_cents, excluded_channels=()):
    """Select affordable rows without mutating the inputs."""
    if isinstance(budget_cents, bool) or not isinstance(budget_cents, int):
        raise ValueError("budget_cents must be a nonnegative integer")
    if budget_cents < 0:
        raise ValueError("budget_cents must be a nonnegative integer")

    selected_ids = []
    remaining_cents = budget_cents

    for row in rows:
        cost_cents = row["cost_cents"]
        if cost_cents <= remaining_cents:
            selected_ids.append(row["id"])
            remaining_cents -= cost_cents

    return {
        "selected_ids": selected_ids,
        "spent_cents": budget_cents - remaining_cents,
        "remaining_cents": remaining_cents,
    }
```