ComponentSource only support 128 components because ArchetypeWriter use u128 to store claimed.

[lazytiger]

pub struct ArchetypeWriter<'a> {
    arch_index: ArchetypeIndex,
    archetype: &'a mut Archetype,
    components: MultiMut<'a>,
    claimed: u128,
    initial_count: usize,
}

ArchetypeWriter only counts at most 128 components, but this limit does not exist if using entry.add_component.
Could clamied be extended to a slice or something else?

[lazytiger]

The problem is components actually stored in storage, but the claimed counter is overflowed, so the assertion failed.

[selbyk]

Are you talking about u128 and usize?