{
  "step": "C277",
  "status": "passed",
  "assertions_passed": 37,
  "checks": [
    "six retained annual indices",
    "source598 at j2",
    "cumulative partner exists j2",
    "regular Flood source j2",
    "phase alignment j2 offset-1/4",
    "phase alignment j2 offset1/4",
    "source598 at j3",
    "cumulative partner exists j3",
    "regular Flood source j3",
    "phase alignment j3 offset-1/4",
    "phase alignment j3 offset1/4",
    "source598 at j4",
    "cumulative partner exists j4",
    "regular Flood source j4",
    "regular crosspair width j4",
    "phase alignment j4 offset-1/4",
    "phase alignment j4 offset1/4",
    "source598 at j5",
    "cumulative partner exists j5",
    "regular Flood source j5",
    "regular crosspair width j5",
    "phase alignment j5 offset-1/4",
    "phase alignment j5 offset1/4",
    "source598 at j6",
    "cumulative partner exists j6",
    "regular Flood source j6",
    "regular crosspair width j6",
    "phase alignment j6 offset-1/4",
    "phase alignment j6 offset1/4",
    "source598 at j7",
    "cumulative partner exists j7",
    "regular Flood source j7",
    "regular crosspair width j7",
    "phase alignment j7 offset-1/4",
    "phase alignment j7 offset1/4",
    "four complete regular crosspairs",
    "only lower two counterparts absent"
  ],
  "source_checks_passed": 9,
  "source_checks": [
    "frozen input PREVIOUS_CERTIFICATE.json",
    "frozen input PREVIOUS_RESULTS.json",
    "frozen input PREVIOUS_CHECKPOINT.md",
    "frozen input C271_FAMILIES.json",
    "frozen input C271_REGISTER.json",
    "frozen input C271_COVERAGE.json",
    "frozen input C276_IDENTITIES.json",
    "predecessor binding PREVIOUS_RESULTS.json",
    "predecessor binding PREVIOUS_CHECKPOINT.md"
  ],
  "canonical_or_graph_edits": false,
  "new_independent_agent_review": false
}