Classifiers

Reusable decision classifiers for decision models such as TypeSafe's Jev and the open-weight Kev. Each classifier asks one constrained question about a state, and your code acts on the answer. Chains show how classifiers combine, with branches driven by outcomes.

Educational catalog. Nothing here calls a model. Example outcomes are illustrative judgments written for teaching, not model outputs, scores or accuracy claims. Sourced documentation is labelled separately.

Classifiers

12 classifiers
NoulCustomer support

In-scope request check

Decide whether a message is about something your team supports before trusting a routing choice.

In scopeUnclearOut of scope
Used in 1 chain
ChoiceCustomer support

Support ticket routing

Send each support message to the team that can resolve it.

Billing teamTechnical teamAccount teamShipping team+1
Used in 1 chain
ScoreCustomer support

Ticket urgency

Rate how soon a message needs a response, and send unclear cases to a person.

Standard queuePriority queuePage on-callUnclear urgency
Used in 1 chain
NoulRefunds

Refund request detection

Tell whether a customer is actually asking for money back.

Refund requestedUnclearNo refund request
Used in 2 chains
ChoiceRefunds

Refund information check

Find out what a refund request is missing before anyone decides on it.

CompleteAsk which chargeAsk for the reasonAsk for details+1
Used in 1 chain
ChoiceRefunds

Refund policy eligibility

Read a refund request against your written policy and recommend a decision.

EligibleNot eligibleException reviewNeeds a person
Used in 1 chain
ChoiceModeration

Community policy category

Name the part of your community policy a post most likely breaks, if any.

No violationLikely spamPossible harassmentExplicit or graphic+2
Used in 1 chain
ScoreModeration

Harm severity

Rate how much harm content could cause if it stays visible.

Keep visibleLimit and reviewHide and escalateNeeds a person
Used in 1 chain
NoulSecurity signals

Prompt injection signal

Flag content that tries to give instructions to an AI assistant, as one layer among several.

Signal detectedUnclearNo signal
Used in 1 chain
ChoiceAgents

Agent tool routing

Choose which tool an assistant should use next, from a fixed list.

Search help centerLook up orderCreate ticketReply directly+1
Used in 1 chain
ScoreGrounding

Retrieved passage relevance

Score how useful each retrieved passage is for answering the question.

IncludeBorderlineExclude
Used in 1 chain
ChoiceGrounding

Answer groundedness

Check whether the sources support each claim in a drafted answer.

SupportedContradictedNot addressedNeeds a person
Used in 1 chain

Decision chains

4 chains

Complete flows that reuse the classifiers above, with branches driven by outcomes.