Variable: E_TOKENIZABLE_EVALUATOR_INVALID

const E_TOKENIZABLE_EVALUATOR_INVALID: CreatedException<[string]>;

Defined in: src/lib/exceptions/runtime.ts:622

Thrown by @nhtio/adk!Tokenizable when a DYNAMIC (evaluatable) value's evaluator function fails to produce a usable string at resolve time — either it THREW, or it RETURNED A NON-STRING.

Remarks

An evaluatable Tokenizable wraps a (ctx?) => string that is invoked at prompt-assembly time (and, with no context, at measurement/serialization time). Both failure modes are PROGRAMMER errors, not recoverable runtime conditions: an evaluator that throws is buggy, and a non-string return would otherwise coerce silent garbage into the prompt (undefined → "undefined", an object → "[object Object]"). So we surface loudly rather than degrade — the only sanctioned fallback is the evaluator's OWN ctx === undefined branch, which must itself return a string. Inside a runner the throw rides the nack → error seam (a dispatch error / banner); outside a runner it propagates as the real bug it is.

The single printf argument describes the failure ("threw" or "returned a non-string (type)"); the original error, when the evaluator threw, is attached on cause.