Jibu

A thin client for the Anthropic API, built on Req.

Jibu sends request bodies unchanged. It has no model list and no parameter schema. New API fields therefore work without a new release.

Features

• ask/3 and extract/4 for text and structured output, with client defaults
• Full Messages requests with effort and prompt caching
• Token counting and the Models API
• Image and document content, and the Files API
• Message Batches
• A tool-use loop with local tool functions
• Typed errors, retries with retry-after, and telemetry
• Tests through Req.Test, without the network

Jibu is not affiliated with or endorsed by Anthropic.

Usage

client = Jibu.new(model: "claude-opus-5-5", max_tokens: 1024)

{:ok, text} = Jibu.ask(client, "Name three rivers in Germany.", effort: :low)

{:ok, booking} = Jibu.extract(client, "Workshop with MRV, 9 to 11:30.", schema)

Jibu.messages/2 takes a full request body and sends it unchanged. In tests, pass plug: {Req.Test, MyStub} to Jibu.new/1.

Installation

Add Jibu to the dependencies in mix.exs:

{:jibu, "~> 0.1"}

Documentation

• Getting started
• Structured output
• Prompt caching
• Images, documents and files
• Batches
• Tools
• Errors, retries and telemetry
• Contributing: development setup, mise commands and checks.
• Changelog