{
  "task": {
    "id": "case_18",
    "name": "token_frequency_classifier",
    "summary": "Classify each token based on its frequency as 'rare', 'common', or 'frequent'.",
    "examples": [
      {
        "input": [
          "BOS",
          "a",
          "d",
          "b",
          "e",
          "d",
          "a",
          "a",
          "c",
          "c"
        ],
        "output": [
          "BOS",
          "common",
          "rare",
          "rare",
          "rare",
          "rare",
          "common",
          "common",
          "rare",
          "rare"
        ]
      },
      {
        "input": [
          "BOS",
          "b",
          "d",
          "d",
          "c",
          "d",
          "d",
          "a",
          "c",
          "e"
        ],
        "output": [
          "BOS",
          "rare",
          "common",
          "common",
          "rare",
          "common",
          "common",
          "rare",
          "rare",
          "rare"
        ]
      },
      {
        "input": [
          "BOS",
          "c",
          "e",
          "a",
          "b",
          "d",
          "a",
          "d",
          "b",
          "b"
        ],
        "output": [
          "BOS",
          "rare",
          "rare",
          "rare",
          "common",
          "rare",
          "rare",
          "rare",
          "common",
          "common"
        ]
      },
      {
        "input": [
          "BOS",
          "e",
          "d",
          "c",
          "e",
          "b",
          "d",
          "b",
          "d",
          "e"
        ],
        "output": [
          "BOS",
          "common",
          "common",
          "rare",
          "common",
          "rare",
          "common",
          "rare",
          "common",
          "common"
        ]
      },
      {
        "input": [
          "BOS",
          "d",
          "e",
          "c",
          "e",
          "e",
          "b",
          "c",
          "c",
          "c"
        ],
        "output": [
          "BOS",
          "rare",
          "common",
          "common",
          "common",
          "common",
          "rare",
          "common",
          "common",
          "common"
        ]
      }
    ],
    "is_categorical": true
  },
  "program": "frequency = make_hist()\ntotal_tokens = make_length()\nfrequency_classification = rasp.SequenceMap(\n  lambda freq, total: \"frequent\" if freq > total/2 else (\"common\" if freq > total/4 else \"rare\"),\n  frequency, total_tokens)\nreturn frequency_classification",
  "components": [
    {
      "id": "L0H0_ATTN",
      "hook": "blocks.0.attn.hook_result[0]",
      "role": {
        "tag": "AGGREGATOR",
        "note": "Builds the token-equality matching structure used to count how often each token appears."
      },
      "rasp_vars": [
        "same_tok"
      ],
      "labels": [
        "hist_2_selector_width_attn_output"
      ]
    },
    {
      "id": "L0H1_ATTN",
      "hook": "blocks.0.attn.hook_result[1]",
      "role": {
        "tag": "AGGREGATOR",
        "note": "Builds the all-positions selector used as the basis for computing sequence length."
      },
      "rasp_vars": [
        "all_true_selector"
      ],
      "labels": [
        "length_3_selector_width_attn_output"
      ]
    },
    {
      "id": "L0_MLP",
      "hook": "blocks.0.mlp.hook_post",
      "role": {
        "tag": "MAPPER",
        "note": "Turns the selector-width signals into usable numeric features for per-token frequency and total length."
      },
      "rasp_vars": [
        "frequency",
        "total_tokens"
      ],
      "labels": [
        "hist_2",
        "length_3",
        "hist_2_selector_width_attn_output",
        "length_3_selector_width_attn_output"
      ]
    },
    {
      "id": "L1_MLP",
      "hook": "blocks.1.mlp.hook_post",
      "role": {
        "tag": "COMBINER",
        "note": "Combines per-token frequency with total length to assign the label rare/common/frequent."
      },
      "rasp_vars": [
        "frequency_classification"
      ],
      "labels": [
        "sequence_map_1"
      ]
    }
  ]
}