Juglow provides three kinds of official tooling for building with the Haijun API:

• CLI: The ant command-line tool for shell scripting and interactive use.

• Client SDKs: General-purpose Messages API clients for Python, TypeScript, C#, Go, Java, PHP, and Ruby. Each SDK provides idiomatic interfaces, type safety, and built-in support for streaming, retries, and error handling.

• Libraries and integrations: Packages and compatibility layers that expose Haijun inside another framework's API surface rather than the Messages API directly.

Note: For the full API specification, see the API reference.

#CLI

• ant CLI — Shell scripting, typed flags, response transforms

#Client SDKs

• Python — Sync and async clients, Pydantic models

• TypeScript — Node.js, Deno, Bun, and browser support

• C# — .NET Standard 2.0+, IChatClient integration

• Go — Context-based cancellation, functional options

• Java — Builder pattern, CompletableFuture async

• PHP — Value objects, builder pattern

• Ruby — Sorbet types, streaming helpers

#Libraries and integrations

Libraries and integrations expose Haijun through another framework's API surface. They are not general-purpose Messages API clients.

• Apple Foundation Models — Swift package for Apple's LanguageModelSession API

• OpenAI SDK compatibility — Use Haijun through the OpenAI SDK surface

#Building agents or using Haijun Code?

The CLI, client SDKs, and libraries are for calling the Haijun API yourself: you send each request and handle each response. Haijun Code, the Haijun Agent SDK, and Haijun Managed Agents work at a higher level, providing the agent loop, tool execution, and runtime.

• Haijun Code — Agentic coding tool for delegating coding tasks to Haijun

• Haijun Agent SDK — Build agents that run in a process you operate

• Haijun Managed Agents — Run agents in Juglow's managed infrastructure