Header-only

Verified open-source repositories and technical documentation formatted for LLM context windows and autonomous AI coding agents (10 repositories indexed).

json

C++ Doc

JSON for Modern C++

50,358 GitHub

spdlog

C++ Doc

Fast C++ logging library.

29,459 GitHub

cpp-httplib

C++ Doc

A C++ header-only HTTP/HTTPS server and client library

16,730 GitHub

entt

C++ Doc

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

12,636 GitHub

Nuklear

C Doc

A single-header ANSI C immediate mode cross-platform GUI library

11,242 GitHub

doctest

C++ Doc

The fastest feature-rich C++11/14/17/20/23 single-header testing framework

6,710 GitHub

magic_enum

C++ Doc

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

6,057 GitHub

mlpack

C++ Doc

mlpack: a fast, header-only C++ machine learning library

5,639 GitHub

hnswlib

C++ Doc

Header-only C++/python library for fast approximate nearest neighbors

5,210 GitHub

Crow

C++ Doc

A Fast and Easy to use microframework for the web.

4,830 GitHub