Class GraphValidator

Static validator for compiled execution graphs.

Runs a suite of structural checks against a CompiledExecutionGraph:

1. Cycle detection — rejects cyclic graphs when requireAcyclic is not false.
2. Unreachable nodes — warns when one or more nodes cannot be reached from __START__.
3. Edge reference integrity — errors when an edge's source/target names a non-existent node (ignoring the sentinel values __START__ and __END__).
4. Entry point — errors when no edge originates from __START__.
5. Exit point — errors when no edge terminates at __END__.

Example

const result = GraphValidator.validate(graph, { requireAcyclic: true });
if (!result.valid) {
  throw new Error(result.errors.join('\n'));
}
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