---
title: llm-typesafe 0.1a0
link: https://simonwillison.net/2026/Sep/22/llm-typesafe/
source: simonwillison-net
published: 2026-09-22T15:54:16Z
updated: 2026-09-22T15:54:16Z
first_seen: 2026-09-22T18:47:44.447844335Z
labels:
- jev
- llm
- projects
summary: 'Release: llm-typesafe 0.1a0 I built this new plugin for LLM to add support for TypeSafe AI''s new Jev model. Install it like this: llm install llm-typesafe Then set an API key (get one here, the waitlist seems to move pretty fast): llm keys set typesafe # Paste key And now you can ask yes/no "noul" questions like this: llm -m jev ''Please refund my last payment.'' \ -s ''Does this message explicitly request a refund?'' Output: {"type": "noul", "noul": 0.99} Or choice questions like this: cat message.txt | llm -m jev \ -s ''Which team should handle this message? If billing and technical issues both occur, choose billing.'' \ -o answer_type choice \ -o criteria ''{ "billing":"Charges, invoices, payments, or refunds", "technical":"Problems installing or using the product", "other":"Neither category fits" }'' Or scoring questions like this: cat report.txt | llm -m jev \ -s ''How reproducible is the problem described in this report?'' \ -o answer_type score \ -o criteria ''[ "No reproduction instructions", "Some instructions, but important steps are missing", "Complete steps with expected and actual results" ]'' See the README for more details. Tags: projects, llm, jev'
content: extracted
html: 2026-09-22-llm-typesafe-0-1a0.html
---

I built this new plugin for [LLM](https://llm.datasette.io/) to add support for [TypeSafe AI's new Jev model](https://simonwillison.net/2026/Sep/21/jev/). Install it like this:

```
llm install llm-typesafe
```

Then set an API key ([get one here](https://console.typesafe.ai/), the waitlist seems to move pretty fast):

```
llm keys set typesafe
# Paste key
```

And now you can ask yes/no "noul" questions like this:

```
llm -m jev 'Please refund my last payment.' \
  -s 'Does this message explicitly request a refund?'
```

Output:

```
{"type": "noul", "noul": 0.99}
```

Or choice questions like this:

```
cat message.txt | llm -m jev \
  -s 'Which team should handle this message? If billing and technical issues both occur, choose billing.' \
  -o answer_type choice \
  -o criteria '{
    "billing":"Charges, invoices, payments, or refunds",
    "technical":"Problems installing or using the product",
    "other":"Neither category fits"
  }'
```

Or scoring questions like this:

```
cat report.txt | llm -m jev \
  -s 'How reproducible is the problem described in this report?' \
  -o answer_type score \
  -o criteria '[
    "No reproduction instructions",
    "Some instructions, but important steps are missing",
    "Complete steps with expected and actual results"
  ]'
```

See [the README](https://github.com/simonw/llm-typesafe/blob/main/README.md) for more details.