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              106,
              107,
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              119,
              120,
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              124,
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              135,
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              146,
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              165,
              166,
              168,
              170
            ],
            "message_flip_count": 3,
            "parity_flip_count": 31,
            "total_flip_count": 34,
            "message_flip_cost": 1.170591,
            "parity_flip_cost": 48.765114,
            "total_reliability_cost": 49.935705,
            "closed_syndrome_weight": 999,
            "valid_codeword_hard_decision": true,
            "message91": "1011100111111101111111111111011111111101110111101011001111101011110111111111111011101111111",
            "message91_sha256_16": "8665604134db9f8b",
            "codeword174_sha256_16": "55ae0659353d3c4e"
          },
          {
            "message_flip_indices": [
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            "parity_flip_indices": [
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              167,
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              171
            ],
            "all_flip_indices": [
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            "message_flip_count": 3,
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            "total_flip_count": 34,
            "message_flip_cost": 0.274747,
            "parity_flip_cost": 50.102218,
            "total_reliability_cost": 50.376965,
            "closed_syndrome_weight": 999,
            "valid_codeword_hard_decision": true,
            "message91": "1011100111111101111111111111000111111101110111101011001111101011111010111111111001101111111",
            "message91_sha256_16": "87320eb9f8923b18",
            "codeword174_sha256_16": "e819b7503c7ac99b"
          },
          {
            "message_flip_indices": [
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            "parity_flip_indices": [
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            "all_flip_indices": [
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            "message_flip_count": 3,
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            "total_flip_count": 32,
            "message_flip_cost": 0.745046,
            "parity_flip_cost": 50.83093,
            "total_reliability_cost": 51.575976,
            "closed_syndrome_weight": 999,
            "valid_codeword_hard_decision": true,
            "message91": "1011100111111101111111111111011111111101110111101011101111101011111010111111111011101011110",
            "message91_sha256_16": "06f1492d4004ad05",
            "codeword174_sha256_16": "e01aee569d423294"
          },
          {
            "message_flip_indices": [
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            "parity_flip_indices": [
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            ],
            "all_flip_indices": [
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            "message_flip_count": 1,
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            "message_flip_cost": 0.275273,
            "parity_flip_cost": 51.719249,
            "total_reliability_cost": 51.994522,
            "closed_syndrome_weight": 999,
            "valid_codeword_hard_decision": true,
            "message91": "1011100111111101111111111111011111111101110111101011001111101011111010111111111011101011111",
            "message91_sha256_16": "6830a3cab7de2075",
            "codeword174_sha256_16": "b50b960ae03a0ea9"
          },
          {
            "message_flip_indices": [
              49,
              30,
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            ],
            "parity_flip_indices": [
              96,
              97,
              99,
              101,
              102,
              105,
              110,
              111,
              115,
              116,
              117,
              119,
              121,
              124,
              125,
              126,
              131,
              134,
              135,
              137,
              140,
              141,
              145,
              146,
              147,
              150,
              161,
              162,
              166,
              171,
              172
            ],
            "all_flip_indices": [
              49,
              30,
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              97,
              99,
              101,
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              105,
              110,
              111,
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              117,
              119,
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              125,
              126,
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              137,
              140,
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              146,
              147,
              150,
              161,
              162,
              166,
              171,
              172
            ],
            "message_flip_count": 3,
            "parity_flip_count": 31,
            "total_flip_count": 34,
            "message_flip_cost": 0.353937,
            "parity_flip_cost": 52.218387,
            "total_reliability_cost": 52.572324,
            "closed_syndrome_weight": 999,
            "valid_codeword_hard_decision": true,
            "message91": "1011100111111101111111111111010111111101110111101111001111101011111010111111111011101011111",
            "message91_sha256_16": "ec338375494e781a",
            "codeword174_sha256_16": "96eccd15b2b6fe05"
          }
        ],
        "warning": "Syndrome closure can always form a codeword by parity repair; this is only a ranked candidate generator until JS8 message unpack/CRC validates a candidate."
      }
    }
  ],
  "decodes": [],
  "outputs": {
    "ldpc_soft_decode_json": "/decoders/js8_decoder/runtime/ldpc_soft_decode/step43_ldpc_soft_decode.json"
  },
  "warnings": [
    "Step 47 keeps the direct timing-sweep primary row first and adds a bounded syndrome-closure repair candidate generator ranked by LLR reliability cost.",
    "Step 47 syndrome-closure repair is diagnostic only: parity repair can force syndrome zero, so candidates still need JS8 message unpack/CRC validation before they count as real decodes.",
    "This still does not unpack JS8 text or validate CRC/message payloads.",
    "If soft success is true or a syndrome-closure candidate passes future JS8 message/CRC validation, the next step can unpack the 91-bit message. Otherwise continue timing/interleaver/LLR tuning."
  ],
  "next_action": "Inspect best_syndrome_closure_repair_probe.top_candidates. Next step should add bounded JS8 91-bit message unpack/CRC validation for the ranked candidate messages while keeping timing best row unchanged."
}