Function: traceDerivation()

August 8, 2026 · View on GitHub

@plures/praxis / index / traceDerivation

traceDerivation<TContext>(factTag, _engine, registry): DerivationChain

Defined in: packages/praxis-core/src/decision-ledger/derivation.ts:26

Trace how a fact was derived through the rule chain.

Starting from the fact tag, walks backward through the dependency graph to find the full derivation chain: event → rule A → fact X → rule B → fact Y

Uses the engine's current state to identify which rules actually fired.

Type Parameters

TContext = unknown

string

The fact type tag to trace backwards from

The logic engine (used for current state introspection)

The Praxis registry containing all rules

A DerivationChain showing the complete derivation path to the fact