> For the complete documentation index, see [llms.txt](https://booksbyus.gitbook.io/scalable-c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://booksbyus.gitbook.io/scalable-c/master.md).

# Introduction

## [Save to Kindle](http://hintjens.com/books)

**Source repo is** <https://github.com/booksbyus/scalable-c>**, pull requests are welcome.**

Cover font: Kontrapunkt by Bo Linnemann, Kontrapunkt A/S. Text fonts: EB Garamond by Georg Duffner, MonospaceTypewriter by Manfred Klein..

Pieter Hintjens has been programming C since 1985. He is the author of many free software products written in C: Libero (1991), SFL (1996), Xitami (1998), OpenAMQ (2004). In 2007 he founded the ZeroMQ community. His github profile is <https://github.com/hintjens>.

Other books by the same author: ["ZeroMQ - Messaging for Many Applications"](http://www.amazon.com/ZeroMQ-Messaging-Applications-Pieter-Hintjens/dp/1449334067) (O'Reilly), ["Culture and Empire: Digital Revolution"](http://cultureandempire.com) (Amazon.com), ["The Psychopath Code"](http://thepsychopathcode.com) (Amazon.com).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://booksbyus.gitbook.io/scalable-c/master.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
