anchor.diff:        "gsnap.blast.m8",
         "gsnap.reassigned.m8",
         "gsnap_refined.hitsummary.tab",
  -      "refined_gsnap_counts.json",
  +      "gsnap_refined_counts.json",
         "gsnap_genus_accession_list.tab"
       ],
       "rapsearch2_out": [
  
positive.code:       "rapsearch2.blast.m8",
        "rapsearch2.reassigned.m8",
        "rapsearch2_refined.hitsummary.tab",
        "refined_rapsearch2_counts.json",
        "rapsearch2_genus_accession_list.tab"
      ],
      "taxon_count_out": ["taxon_counts.json"],
  
negative.code:       }
      },
      {
        "in": ["rapsearch2_out", "host_filter_out"],
        "out": "refined_rapsearch2_out",
        "class": "PipelineStepReclassifyReads",
        "module": "idseq_dag.steps.reclassify_reads", 
  