A transition applies an event or result to the current state and selects a next state. Its preconditions and effects should be explicit enough to test.

A Transition Changes Graph State

A branch predicate maps current evidence to one outgoing route. It should be mutually understandable, cover expected cases, and provide a fallback for unknowns.

Branch Predicates Must Be Decidable

Control-flow edges determine execution order, branching, joining, retry, and termination. They should not be inferred accidentally from where data happens to be stored.

Control Flow Answers What Runs Next

In this situation—moving a learner from practice to remediation after a misconception appears—which choice best applies “A Transition Changes Graph State”?

A router selects a specialist, tool, or path from evidence about the request and declared capability. It needs a fallback when no option is suitable or confidence is low.

Routers Match Requests to Capabilities

A fixed workflow follows predetermined transitions; an agentic workflow delegates some choices to a model or policy. Good designs use deterministic control where rules are known and bounded choice where ambiguity is real.

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