@spec check(
  String.t(),
  keyword()
) :: {:ok, map()} | {:env, String.t()}

Runs the assembled diff gate.

@spec index(
  String.t(),
  keyword()
) :: map()

Builds the in-memory corpus index for root.

Delegates to Ancora.Index.build/2. The semver-stable parse API is Ancora.Parser.parse_file/2 and Ancora.DecisionParser.parse_file/2.

@spec validate(
  String.t(),
  keyword()
) :: {:ok, map()}

Validates the current corpus without diff analysis or target compilation.