{
  "version": 1,
  "backend": "python",
  "runner": "packages/adapter-jinja/python/tests/test_helper_vectors.py",
  "spec": "spec/template-helpers.md",
  "divergences": {
    "add/beyond the safe-integer edge rounds as a double": {
      "expect": 9007199254740993,
      "reason": "Python int arithmetic is exact (arbitrary precision), not double-rounded"
    },
    "number/empty string coerces to 0": {
      "expect": { "$num": "NaN" },
      "reason": "deliberate: empty input must not silently zero downstream arithmetic (matches the Perl port)"
    },
    "number/null coerces to 0": {
      "expect": { "$num": "NaN" },
      "reason": "deliberate: unset props must not silently zero downstream arithmetic (matches the Perl port)"
    },
    "string/null renders as the string \"null\"": {
      "expect": "",
      "reason": "deliberate: an unset prop must not surface a literal \"null\" in HTML (matches the Perl port)"
    },
    "sort/localeCompare orders case-insensitively (ICU collation)": {
      "expect": ["B", "a"],
      "reason": "Python str comparison is codepoint order, not ICU collation"
    },
    "sort/relational compare on numeric strings is lexical": {
      "expect": ["9", "10"],
      "reason": "the \"auto\" compare goes numeric when both keys look_like_number (Perl/Go parity)"
    },
    "reduce/numeric-string items concatenate under JS +": {
      "expect": 11.0,
      "reason": "numeric folds parse numeric strings instead of concatenating (Perl/Go parity)"
    }
  },
  "unsupported": {}
}