{
  "task": {
    "id": "case_2",
    "name": "reverse_sequence",
    "summary": "Reverse the input sequence.",
    "examples": [
      {
        "input": [
          "BOS",
          "l",
          "z",
          "v",
          "l",
          "y",
          "q",
          "j",
          "p",
          "o"
        ],
        "output": [
          "BOS",
          "o",
          "p",
          "j",
          "q",
          "y",
          "l",
          "v",
          "z",
          "l"
        ]
      },
      {
        "input": [
          "BOS",
          "w",
          "k",
          "k",
          "x",
          "u",
          "d",
          "h",
          "x",
          "c"
        ],
        "output": [
          "BOS",
          "c",
          "x",
          "h",
          "d",
          "u",
          "x",
          "k",
          "k",
          "w"
        ]
      },
      {
        "input": [
          "BOS",
          "v",
          "u",
          "b",
          "x",
          "l",
          "f",
          "b",
          "u",
          "a"
        ],
        "output": [
          "BOS",
          "a",
          "u",
          "b",
          "f",
          "l",
          "x",
          "b",
          "u",
          "v"
        ]
      },
      {
        "input": [
          "BOS",
          "g",
          "t",
          "o",
          "k",
          "h",
          "u",
          "g",
          "z",
          "s"
        ],
        "output": [
          "BOS",
          "s",
          "z",
          "g",
          "u",
          "h",
          "k",
          "o",
          "t",
          "g"
        ]
      },
      {
        "input": [
          "BOS",
          "o",
          "s",
          "l",
          "w",
          "t",
          "y",
          "c",
          "e",
          "s"
        ],
        "output": [
          "BOS",
          "s",
          "e",
          "c",
          "y",
          "t",
          "w",
          "l",
          "s",
          "o"
        ]
      }
    ],
    "is_categorical": true
  },
  "program": "length = make_length(); opp_idx = length - indices; opp_idx_minus_1 = opp_idx - 1; reverse_selector = Select(indices, opp_idx_minus_1, EQ); reverse = Aggregate(reverse_selector, tokens)",
  "components": [
    {
      "id": "L0H0_ATTN",
      "hook": "blocks.0.attn.hook_result[0]",
      "role": {
        "tag": "AGGREGATOR",
        "note": "Produces a sequence-length signal by counting tokens via the attention output width."
      },
      "rasp_vars": [
        "length"
      ],
      "labels": [
        "length_5_selector_width_attn_output"
      ]
    },
    {
      "id": "L0_MLP",
      "hook": "blocks.0.mlp.hook_post",
      "role": {
        "tag": "MAPPER",
        "note": "Computes sequence length feature from the length-related signal produced by the attention head."
      },
      "rasp_vars": [
        "length"
      ],
      "labels": [
        "length_5",
        "length_5_selector_width_attn_output"
      ]
    },
    {
      "id": "L1_MLP",
      "hook": "blocks.1.mlp.hook_post",
      "role": {
        "tag": "COMBINER",
        "note": "For each position, computes which position it should pull from to create the reversed order."
      },
      "rasp_vars": [
        "opp_idx"
      ],
      "labels": [
        "opp_idx_4"
      ]
    },
    {
      "id": "L2_MLP",
      "hook": "blocks.2.mlp.hook_post",
      "role": {
        "tag": "MAPPER",
        "note": "Adjusts the computed source position so it lines up with the correct reverse indexing."
      },
      "rasp_vars": [
        "opp_idx_minus_1"
      ],
      "labels": [
        "opp_idx-1_3"
      ]
    },
    {
      "id": "L3H0_ATTN",
      "hook": "blocks.3.attn.hook_result[0]",
      "role": {
        "tag": "ROUTER",
        "note": "Moves tokens so every output position receives the token from its mirrored position, producing the reversed sequence."
      },
      "rasp_vars": [
        "reverse_selector",
        "reverse"
      ],
      "labels": [
        "reverse_1"
      ]
    }
  ]
}