{
  "step": "C388",
  "status": "passed",
  "assertions_passed": 21,
  "checks": [
    "adjacent source strip 0",
    "whole two-square strip 0",
    "translated frame strip (0, 0)",
    "translated frame strip (0, 1)",
    "word endpoint and distinct map (0, ('P', 'P'))",
    "word endpoint and distinct map (0, ('P', 'J'))",
    "word endpoint and distinct map (0, ('J', 'P'))",
    "word endpoint and distinct map (0, ('J', 'J'))",
    "second E source obstruction 0",
    "no next MT Gear endpoint 0",
    "adjacent source strip 1",
    "whole two-square strip 1",
    "translated frame strip (1, 0)",
    "translated frame strip (1, 1)",
    "word endpoint and distinct map (1, ('P', 'P'))",
    "word endpoint and distinct map (1, ('P', 'J'))",
    "word endpoint and distinct map (1, ('J', 'P'))",
    "word endpoint and distinct map (1, ('J', 'J'))",
    "second E source obstruction 1",
    "no next MT Gear endpoint 1",
    "finite strip counts"
  ],
  "source_checks_passed": 17,
  "source_checks": [
    "frozen PREVIOUS_CERTIFICATE.json",
    "frozen PREVIOUS_RESULTS.json",
    "frozen PREVIOUS_DATA.json",
    "frozen PREVIOUS_CHECKPOINT.md",
    "frozen PREVIOUS_NEXT_STEP.json",
    "frozen File_18.md",
    "frozen File_09.md",
    "frozen C286_DATA.json",
    "frozen C287_DATA.json",
    "frozen C271_REGISTER.json",
    "frozen C385_DATA.json",
    "frozen C386_DATA.json",
    "frozen C380_DATA.json",
    "predecessor PREVIOUS_RESULTS.json",
    "predecessor PREVIOUS_DATA.json",
    "predecessor PREVIOUS_CHECKPOINT.md",
    "predecessor PREVIOUS_NEXT_STEP.json"
  ],
  "canonical_or_graph_edits": false,
  "check_scope": "Finite source-labelled calculation; counts are verification inventory, not witness counts."
}