Consecutive same-role parts, as the surface projection grouped them.
role is the SURFACE role (system / user / assistant / tool). Collapsing that
onto a provider's smaller role set is the encoder's job and is part of the
wire shape it is versioned on.
Consecutive same-role parts, as the surface projection grouped them.
roleis the SURFACE role (system / user / assistant / tool). Collapsing that onto a provider's smaller role set is the encoder's job and is part of the wire shape it is versioned on.