{
  "kind": "actual-cpu-training",
  "fault": "none",
  "step": 80,
  "parameters": {
    "weight": 3.0000640810916352,
    "bias": 1.9999645194506697
  },
  "mse": 6.712663692343529e-09,
  "samplePosition": 16,
  "checkpointIncludes": [
    "parameters",
    "optimizer configuration and velocity",
    "step",
    "sample position and order",
    "dataset",
    "RNG state"
  ],
  "scope": "Real CPU arithmetic for a two-parameter linear model; no GPU/LLM performance claim."
}