{
  "schema": "portfolio-trace-excerpt-v1",
  "title": "Trace Explorer — one measured generation step",
  "provenance": {
    "dataKind": "Real recorded measurements from a controlled synthetic fixture",
    "capturedDate": "2026-09-16",
    "model": "Qwen3-Coder-30B-A3B-Instruct-MLX-4bit",
    "runtime": "MLX-LM 0.31.3 / MLX 0.32.0",
    "scope": "One native agent session: two task model completions, one read_file call, exact fixture match.",
    "aliases": "Public completion labels replace original runtime IDs. Numeric indices, token IDs, text, and measured values are unchanged.",
    "verification": "This excerpt was checked against the preserved capture and numeric arrays without rerunning the model."
  },
  "task": {
    "summary": "Read a neutral JSON fixture and return its four fields exactly.",
    "fixture": {
      "fixture_id": "same-run-mlx",
      "nonce": "7d194f3f-3f0e-4b12-b3e6-21f0c45b61c8",
      "color": "cerulean",
      "item": "wooden compass"
    },
    "nonceExplanation": "The nonce is a random test marker generated for this fixture, not a credential or a personal identifier.",
    "tool": "read_file",
    "toolRequestCompletion": "tool-request-completion",
    "toolResult": {
      "content": "1|{\n2|  \"fixture_id\": \"same-run-mlx\",\n3|  \"nonce\": \"7d194f3f-3f0e-4b12-b3e6-21f0c45b61c8\",\n4|  \"color\": \"cerulean\",\n5|  \"item\": \"wooden compass\"\n6|}",
      "total_lines": 6,
      "file_size": 137,
      "truncated": false,
      "is_binary": false,
      "is_image": false
    },
    "finalAnswerCompletion": "final-answer-completion",
    "finalAnswerText": "{\"fixture_id\": \"same-run-mlx\", \"nonce\": \"7d194f3f-3f0e-4b12-b3e6-21f0c45b61c8\", \"color\": \"cerulean\", \"item\": \"wooden compass\"}",
    "exactFixtureMatch": true,
    "toolResultReusedExactly": true
  },
  "inputExcerpt": {
    "completion": "final-answer-completion",
    "scope": "Only the neutral color value from the actual post-tool input; not the full prompt.",
    "indexing": "Zero-based positions in recorded post-template input IDs. Text decoded offline with the same installed tokenizer.",
    "tokens": [
      {
        "position": 3034,
        "tokenId": 3828,
        "text": "cer"
      },
      {
        "position": 3035,
        "tokenId": 1111,
        "text": "ule"
      },
      {
        "position": 3036,
        "tokenId": 276,
        "text": "an"
      }
    ]
  },
  "sample": {
    "completion": "final-answer-completion",
    "sampleIndex": 54,
    "forwardIndex": 55,
    "producingPosition": 3148,
    "indexing": "Zero-based. Producing position is the final input position used to predict this token, not its output position.",
    "tokenId": 3828,
    "text": "cer",
    "emission": "generation step",
    "rawHeadLogit": 49.5,
    "samplerLogprob": 0.0,
    "topCandidates": [
      {
        "tokenId": 3828,
        "text": "cer",
        "samplerLogprob": 0.0
      },
      {
        "tokenId": 10152,
        "text": " cer",
        "samplerLogprob": -19.25
      },
      {
        "tokenId": 3672,
        "text": "cel",
        "samplerLogprob": -21.125
      },
      {
        "tokenId": 68881,
        "text": "cerer",
        "samplerLogprob": -22.125
      },
      {
        "tokenId": 346,
        "text": "ce",
        "samplerLogprob": -22.5
      }
    ],
    "layers": [
      {
        "layer": 0,
        "residuals": {
          "input": {
            "shape": [
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            ],
            "l2": 0.5392292737960815,
            "min": -0.1826171875,
            "max": 0.189453125
          },
          "post_attention": {
            "shape": [
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            ],
            "l2": 1.3498170375823975,
            "min": -1.09375,
            "max": 0.224609375
          },
          "moe_output": {
            "shape": [
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            ],
            "l2": 0.31654220819473267,
            "min": -0.1240234375,
            "max": 0.037109375
          },
          "output": {
            "shape": [
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            ],
            "l2": 1.495349407196045,
            "min": -1.21875,
            "max": 0.2236328125
          }
        },
        "routing": [
          {
            "expertId": 101,
            "routerProbability": 0.0164794921875,
            "selectedWeight": 0.0859375
          },
          {
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            "routerProbability": 0.0167236328125,
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          },
          {
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            "routerProbability": 0.0172119140625,
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          },
          {
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            "routerProbability": 0.019287109375,
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          },
          {
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            "routerProbability": 0.0218505859375,
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          {
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            "routerProbability": 0.022216796875,
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            "routerProbability": 0.05224609375,
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      },
      {
        "layer": 23,
        "residuals": {
          "input": {
            "shape": [
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            ],
            "l2": 10.710396766662598,
            "min": -7.71875,
            "max": 1.6953125
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          "post_attention": {
            "shape": [
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            "l2": 10.874221801757812,
            "min": -7.8125,
            "max": 1.703125
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          "moe_output": {
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            "l2": 1.6300668716430664,
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            "max": 0.10595703125
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          "output": {
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            "l2": 11.124298095703125,
            "min": -7.9375,
            "max": 1.7890625
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        },
        "routing": [
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            "routerProbability": 0.018310546875,
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            "routerProbability": 0.0189208984375,
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          },
          {
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            "routerProbability": 0.0211181640625,
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          },
          {
            "expertId": 120,
            "routerProbability": 0.0211181640625,
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          {
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            "routerProbability": 0.048095703125,
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      },
      {
        "layer": 47,
        "residuals": {
          "input": {
            "shape": [
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            ],
            "l2": 97.96955108642578,
            "min": -62.25,
            "max": 19.875
          },
          "post_attention": {
            "shape": [
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            ],
            "l2": 116.451416015625,
            "min": -73.0,
            "max": 22.875
          },
          "moe_output": {
            "shape": [
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            ],
            "l2": 109.56004333496094,
            "min": -16.875,
            "max": 78.0
          },
          "output": {
            "shape": [
              2048
            ],
            "l2": 97.19422912597656,
            "min": -20.5,
            "max": 26.0
          }
        },
        "routing": [
          {
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            "routerProbability": 0.01531982421875,
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          },
          {
            "expertId": 100,
            "routerProbability": 0.01531982421875,
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          },
          {
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            "routerProbability": 0.0179443359375,
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          },
          {
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            "routerProbability": 0.0196533203125,
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          },
          {
            "expertId": 101,
            "routerProbability": 0.026123046875,
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          },
          {
            "expertId": 39,
            "routerProbability": 0.03857421875,
            "selectedWeight": 0.1484375
          },
          {
            "expertId": 2,
            "routerProbability": 0.041015625,
            "selectedWeight": 0.158203125
          },
          {
            "expertId": 46,
            "routerProbability": 0.08544921875,
            "selectedWeight": 0.328125
          }
        ]
      }
    ]
  },
  "limits": [
    "This is a curated excerpt of a controlled file-read test, not a production task, live monitor, or complete model trace.",
    "Only layers 0, 23, and 47 of 48 are included, at the final input position of one forward. Full vectors and all other samples are omitted.",
    "Expert IDs are indices, not meanings. Routing weights are measured selection weights, not measures of understanding or causal responsibility.",
    "L2 is vector magnitude. Min/max are coordinate ranges. They are not importance scores.",
    "Logits are raw unnormalized scores. Log probabilities retain BF16 rounding; 0.0 is not a claim of 100% confidence.",
    "Input and output fragments belong to the same execution. Their display together does not establish how information was used internally.",
    "No attention probability matrices were captured. These observations do not reveal hidden thoughts or establish why the answer was chosen.",
    "The original run also recorded stop/control and lookahead samples, plus a separate title request. Those are excluded from this excerpt.",
    "Instrumentation adds synchronization overhead; this is not a throughput benchmark.",
    "System instructions, full prompts, tool schemas and arguments, local paths, host details, and runtime/session identifiers are omitted."
  ]
}