Details:
The series of molecular signals initiated by binding of a ligand to the transmembrane receptor smoothened in a precursor cell in the ventral spinal cord that contributes to the commitment of the precursor cell to an interneuron fate. [GO_REF:0000021, GOC:cls, GOC:dgh, GOC:dph, GOC:jid, GOC:mtg_15jun06, PMID:11262869]