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(ExecutionHistoryContext, ExpressionString) -> Boolean
Evaluate an inline expression string against a runtime JSON context containing outputs of prior steps to decide continuation.
Problem it solves
Workflow engines require non-deterministic loop boundaries that are readable, modifiable, and defined declaratively at runtime.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.