{
  "step": "C290",
  "status": "passed",
  "assertions_passed": 27,
  "checks": [
    "physical width dilation 0S",
    "physical width dilation 0F",
    "physical width dilation 0R",
    "physical width dilation 1S",
    "physical width dilation 1F",
    "physical width dilation 1R",
    "physical width dilation 2S",
    "physical width dilation 2F",
    "physical width dilation 2R",
    "physical width dilation 2N",
    "physical width dilation 3S",
    "physical width dilation 3F",
    "physical width dilation 3R",
    "physical width dilation 3N",
    "physical width dilation 4S",
    "physical width dilation 4F",
    "physical width dilation 4R",
    "physical width dilation 4N",
    "physical width dilation 5S",
    "physical width dilation 5F",
    "physical width dilation 5R",
    "physical width dilation 5N",
    "only FloodOFF-to-ON center matches",
    "global center match only opening",
    "noncanonical pair width",
    "phase discrepancy at center hit",
    "single affine map cannot preserve annual steps"
  ],
  "source_checks_passed": 7,
  "source_checks": [
    "frozen input PREVIOUS_CERTIFICATE.json",
    "frozen input PREVIOUS_RESULTS.json",
    "frozen input PREVIOUS_CHECKPOINT.md",
    "frozen input C287_DATA.json",
    "frozen input C286_DATA.json",
    "predecessor binding PREVIOUS_RESULTS.json",
    "predecessor binding PREVIOUS_CHECKPOINT.md"
  ],
  "canonical_or_graph_edits": false,
  "new_independent_agent_review": false
}