{
  "session_id": "session_data_20260409_124358",
  "total_duration_s": 1472.8,
  "n_input_spans": 41,
  "session_goal": "Knit yellow yarn into fabric using knitting needles, sew with white thread, and complete the knitted piece.",
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        }
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          "description": "Knit yellow fabric with knitting needles after sewing.",
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        },
        {
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          "end_time": 822.0,
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        },
        {
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          "end_time": 837.0,
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    }
  ]
}