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jev-recipes

Typed AI decisions for agents, RAG, and support flows: route, rerank, gate, grade, compare, and label text with one function call. Plug into Vercel AI SDK or LangChain, or call any recipe directly.

Recipe guides at jev-recipes.com | Quickstart | Live music app | Coding assistants | Recipe catalog | API vs. SDK vs. recipes | Agent frameworks | Contributing

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248 focused recipes for JavaScript and TypeScript. Route messages, check evidence, and label model responses with a function call.

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Documentation versions

Run npm ls jev-recipes in your project to check the version you installed, then choose its v<version> tag from all release tags to browse matching documentation.

The hosted catalog and links to main can include unreleased changes. See release notes for compatibility and migration changes.

Help and contributions

Ask a usage question, report a software bug, share an unexpected model decision, or request a recipe.

For a reproducible software problem, start with the standalone reproduction example. Share sanitized inputs and logs, never credentials or private data. To help improve the project, see your first contribution.

How it works

Each recipe accepts your data, calls Jev through TypeSafe's System One API or an injected compatible client, and returns a structured decision. Use it in a Node.js backend, a script, or a research evaluation. Your application decides what happens next.

Start with one decision

Your task	Recipe guide	Try without a key	Build the workflow
Route work to the right team	route	npx jev-recipes demo route	Route work
Select useful evidence	rerank	npx jev-recipes demo rerank	Select evidence
Review an agent's proposed action	tool-call-gate	npx jev-recipes demo tool-call-gate	Review an action

These demos use saved responses. The runnable workflow examples show ready decisions, uncertainty, and provider failures. Use TypeSafe directly or Vercel Gateway for live calls.

For example, give route a support message and descriptions of your teams. It returns a team such as billing, or a review outcome when the choice is uncertain.

Evaluate your own cases with the installed evaluator, retain model responses, and replay confidence policies offline. The agent workflow and customer queue show how decisions fit into application code. Direct and Gateway integrations use the same recipe interface.

Watch Jev play checkers against Jev using the checkers-move recipe

Build a complete support flow…