# Developers

This section is for building on Genesis World rather than only using it: extending the engine with your own resources, following the conventions the codebase holds itself to, and measuring where a simulation spends its time. To add a new **sensor** type, see {doc}`Custom sensors </user_guide/sensing/custom_sensors/index>`.

```{toctree}
:hidden:
:maxdepth: 1

extending_genesis
naming_and_variables
profiling
```