Examples

Hello World

A basic function that introduces the library.

basics

basic

string

Write a Type-Safe LLM Function

One schema drives the prompt, the runtime validation, and the inferred TypeScript return type.

basics

basic

json

schema

Yes/No Decisions

Ask the LLM a question and get back a real boolean you can branch on — no string checking.

structured-output

basic

boolean

Extract Structured Data

Pull typed fields like cities and dates out of natural language, enforced by a JSON schema.

structured-output

basic

json

schema

Validate Statements

Check a list of statements against context and conversation, returning a typed verdict for each.

structured-output

basic

json

Working With JSON

Techniques for getting reliable, schema-valid JSON out of LLM responses.

structured-output

basic

json

schema

Intent Classification

Identify the intent of a user’s most recent message, restricted to categories you define.

classification

basic

json

Conditional Logic and Branching

Use LLM outputs to control branching and route to specialized executors based on intent.

classification

simple

Replicating Amazon Lex

Rebuild a Lex-style bot with intent detection and slot filling using composable executors.

classification

simple

json

Combine Two Executors

A single function that wraps 2 executor functions

chains

simple

parser

Story Writing with Sequential Composition

Takes an idea through outline to story using chained LLM calls.

chains

simple

Basic Self-Refinement Loop

An orchestration function that retries generating an answer until it includes a required word and is concise.

chains

simple

Write Code from Spec

A function that generates code from a specification.

code-generation

simple

markdownCodeBlock

Write Tests from Code

A function that generates Jest tests for the code you give it.

code-generation

simple

markdownCodeBlock

ReAct: Search + Calculator

An agent loop that reasons step by step and calls tools like search and a calculator until it reaches an answer.

agents

simple

tools

dialogue

Loading Prompts Remotely

Load prompt templates from a remote source at runtime, keeping prompt content out of your codebase.

prompts

simple

Separate Prompts from Business Logic

Keep prompt templates out of application code, with typed variables and prompts you can test without an API call.

prompts

basic

templates

Retries and Timeouts

Make LLM calls production-safe with per-call timeouts, automatic retries with backoff, and typed error handling.

production

simple

hooks

errors

LLM Calls in Lambda and Cron Jobs

Run typed LLM calls in AWS Lambda or scheduled jobs, with warm-start reuse and timeouts that respect the function limit.

production

simple

serverless

Prompt Injection Screening

A fail-closed guardrail: classify untrusted input before your real executor sees it, with an exact-match parser that blocks on anything unexpected.

production

simple

security

stringExtract