jevr

- [jevr](#jevr)
  - [Installation](#installation)
  - [Authentication](#authentication)
  - [Basic usage](#basic-usage)
  - [Question types](#question-types)
  - [Providers](#providers)
  - [Listing models](#listing-models)
  - [Versioned specifications and multiple
    states](#versioned-specifications-and-multiple-states)
  - [Response object](#response-object)

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# jevr

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`jevr` is an R client for [JEV / TypeSafe System
One](https://docs.typesafe.ai/concepts/system-one). It sends a state and
a set of typed questions to a model and returns structured answers that
can be used directly in R.

JEV is designed for structured decisions rather than conversational
chat. The package supports multiple questions in one evaluation,
probabilities, confidence, usage, and provider metadata.

## Installation

Install the development version from GitHub:

``` r
install.packages("pak")
pak::pak("simxnherrera/jevr")
```

Once `jevr` is available on CRAN, the stable version can be installed
with:

``` r
install.packages("jevr")
```

## Authentication

Set the API key for the provider you want to use in your `.Renviron`
file:

``` r
usethis::edit_r_environ()
```

``` text
# Direct TypeSafe requests
TYPESAFE_API_KEY=your_typesafe_key

# OpenRouter requests
OPENROUTER_API_KEY=your_openrouter_key
```

Keys are read when `jev_ask()` is called and are not included in
returned objects.

## Basic usage

Define one or more questions, then pass them together with the state to
`jev_ask()`:

``` r
library(jevr)

questions <- list(
  department = jev_choice(
    instructions = "Which team should handle this?",