nx_triple_companion_compose_test.nx

nx_triple_companion_compose_test.nx -- heterogeneous 3-modality smoke. Goes beyond [[nx_dual_companion_compose_test]]: instead of two LLM clones, runs THREE actors of DIFFERENT modalities concurrently: NARRATOR (LLM, priority 80) -- nx_actor_role_llm NPC (LLM, priority 60) -- nx_actor_role_llm AUDIO_QC (audio scene grader, priority 50) -- nx_actor_role_audio_grader All three share one scheduler + one message bus + one multiplexer. Each actor calls a DIFFERENT other-agent primitive: NARRATOR/NPC -> embedding_lookup + blas_matmul + sample_categorical AUDIO_QC -> audio_scene_grade This is the smallest-honest demonstration that the parallel-companion substrate handles HETEROGENEOUS modalities, not just N copies of the same primitive. The DND companion north star is one of these scenarios (LLM narrative + NPC dialogue + ambient audio grading + game action processing) running in coherent interleaved fashion.