RoutingChoice
Route a support request
Send each message to the right handler, with an explicit fallback.
THE QUESTION
Which support team should handle this message? Choose other when the request does not fit a listed team.
Model guide
Jev
TypeSafe describes Jev as its first “System One” model: unstructured state goes in, typed probabilistic decisions come out. It is designed for software that needs a Choice, Score, or Noul judgment rather than generated prose.
The library
9 copyable decisions
RoutingChoice
Escalate uncertain classifications
Separate a predicted label from the decision to act on it.
THE QUESTION
What action is the customer asking for? Choose unclear if the message does not establish a specific action.
Code reviewNoul
Screen a diff for runtime bugs
Find changes worth a closer human review before inspecting every line.
THE QUESTION
Does file.patch directly support that this change likely introduces incorrect runtime behavior?
ScoringScore
Score a bug report’s usefulness
Combine specific quality judgments with weights you control.
THE QUESTION · 1 OF 2
How usable are this report’s reproduction steps?
Agent contextNoul
Keep or trim a tool result
Ask whether an older tool call and its full output still matter to the current task.
THE QUESTION · 1 OF 2
Tool call t1 (read_file) should stay in the history: knowing this call was made, with its input, still matters for what the assistant does next
EvaluationNoul
Detect an urgent support ticket
Turn an urgency question into a measurable signal for your response queue.
THE QUESTION
Does this ticket need a response today?
Code reviewNoul
Flag hidden side effects
Identify functions whose names and contracts hide observable changes.
THE QUESTION
Does this function change observable state in a way that is not apparent from its name or supplied contract?
RoutingNoul
Decide if an agent needs a tool
Screen out conversational turns before selecting from a tool catalog.
THE QUESTION
Does answering this turn require calling a tool at all?
EvaluationNoul
Check a release note in one call
Ask independent questions about one document without resending the context.
THE QUESTION · 1 OF 2
Does this release note describe a change that can break an existing integration?