jev

A terminal REPL for shaping TypeSafe AI System One requests before you write any code: send a state plus named, typed questions and read the typed answers back.

cargo install jev-repl
jev            # with TYPESAFE_API_KEY for live answers; without it, answers are simulated

Inside

:preset triage                                   # a ready-made session to poke at
:state The payout failed again, third time.      # bare text works too
:noul is_urgent The message conveys urgency | yes: A deadline | no: Routine
:choice department Which team | billing=Payments | technical=Bugs
:score frustration How frustrated | Calm | Annoyed | Furious
<Enter>                                          # send; answers come back with their distributions

• :lesson walks a ten-step track from "what is a noul" to confidence gating.

• :sketch (Ctrl-K) opens the whole request as one page of text, with the question types read off the punctuation, a gutter that says what each line became, and a live preview of the JSON, simulated answers, or the same request as Rust:

  The payout failed again, third time this month.
  ---
  is_urgent? The message conveys urgency
    yes: A deadline or a threat to leave
  department: Which team should handle this
    billing = Payment or subscription issues
    technical = Bugs or integration problems
  frustration: How frustrated the customer appears
    Calm < Frustrated but civil < Very angry
  

• :build opens a form for one question; :json shows the exact request body, :last the raw response, :rust the session as a program against typesafe-ai-sdk.

• :save triage.jev / :open triage.jev keep sessions as sketch pages; other paths use the request JSON.

Without TYPESAFE_API_KEY it starts in mock mode: answers are simulated locally (deterministic, not predictive) so the shapes can be learned offline. :key <api-key> switches to live calls.

Unofficial. Not affiliated with TypeSafe AI. MIT licensed; source and issues at aoprisan/typesafe-ai-rust-sdk.