libs/README.md

# Required Libraries (download once)

These are header-only libraries. Download them into this directory:

## httplib.h (cpp-httplib)
```bash
curl -L https://raw.githubusercontent.com/yhirose/cpp-httplib/master/httplib.h -o libs/httplib.h
```

## json.hpp (nlohmann/json)
```bash
curl -L https://raw.githubusercontent.com/nlohmann/json/develop/single_include/nlohmann/json.hpp -o libs/json.hpp
```

## Verify
After downloading, this directory should contain:
```
libs/
├── README.md (this file)
├── httplib.h (~800KB)
└── json.hpp (~850KB)
```

Both are MIT licensed, single-header, no build step required.