# Reference

Consult these lovingly-curated reference guides for all your utilization specifics:

Modality Configuration
The definition file for your system under test, and the configuration file for connecting your system to Modality's user-facing tools.
Command Line Client Reference
Command details for the modality and modality-probe command line interfaces.
Instrumentation SDK
Modality's macros for coding in C that provide extra functionality and expose bonus metadata.
Query Language Reference
Modality's expression language, which you'll use to investigate your system.
Objective Definition
An objective definition file sets the terms for Modality's generative tests.
Terms we use to describe Modality's unique functionality.