Context required for applying derivations.

Properties

Name	Type	Description
customFunctions	`Record<string, CustomFunction> \| undefined`	Custom functions for expression evaluation
derivationFunctions	`Record<string, CustomFunction> \| undefined`	Registered custom derivation functions
derivationLogger	`DerivationLogger`	Derivation logger for debug output. Created via `createDerivationLogger()` factory.
externalData	`Record<string, unknown> \| undefined`	External data resolved from form config signals. Made available in evaluation context as `externalData`.
formValue	`Signal<Record<string, unknown>>`	The current form value (signal)
logger	`Logger`	Logger for diagnostic output
maxIterations	`number \| undefined`	Maximum number of iterations for derivation chain processing. Falls back to MAX_DERIVATION_ITERATIONS constant if not provided.
rootForm	`FieldTree<unknown>`	Root form field tree for value updates
warningTracker	`DerivationWarningTracker \| undefined`	Instance-scoped warning tracker to prevent log spam. If not provided, warnings will be logged every time.