Ironvars are runtime variables that can be referenced in several places in your config, then set using the IPC server (such as via the CLI) using the `set` command. Keys can consist of alphanumeric characters, `-` and `_` only. Any UTF-8 string is a valid value. Reference values using `#my_variable`. These update as soon as the value changes. You can set defaults using the `ironvar_defaults` key in your top-level config. Some modules (such as `sys_info`) expose their values over the Ironvar interface, allowing you to build custom interfaces and integrate into scripts. These present their values inside read-only namespaces. Some examples below: ```shell ironbar var list ironbar var list sysinfo ironbar var list sysinfo.disk_percent ironbar var get sysinfo.disk_percent./home ironbar var get sysinfo.disk_percent.mean ironbar var get sysinfo.memory_percent ```