> ## Documentation Index
> Fetch the complete documentation index at: https://docs.basset.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# subsystems

> Which frameworks are logging inside this process, and how loudly

Reads the unified log inside the process. Readings arrive on a fixed window
regardless of activity, one per subsystem and category that logged in it,
ranked by volume.

| | |
| - | - |
| [Delivery](/instruments/metadata) | stream, interval |
| Mechanism | osLogStore |
| [Requires](/instruments/metadata) | iOS 17+, basset 0.1.1+ |

**Config** (`log.subsystems:key=value,...`)

* `subsystem` (string, 256 characters max): Only this subsystem's traffic. Default: every subsystem.

Real output from `basset request get`, captured against a running app:

```
CAPTURED                  ELAPSED  INSTRUMENT

launch 3858228204381003642
2026-08-23T14:36:53.528Z  +0.0s    log.subsystems(logRecord)
├─ windowNanoseconds  15000871709
├─ logSubsystem       com.apple.dt.xctest
├─ logCategory        Default
└─ occurrenceCount    208
2026-08-23T14:36:58.377Z  +4.8s    log.subsystems(logRecord)
├─ windowNanoseconds  15000871709
├─ logSubsystem       com.apple.Accessibility
├─ logCategory        AXRuntimeNotifications
└─ occurrenceCount    29
2026-08-23T14:36:58.377Z  +4.8s    log.subsystems(logRecord)
├─ windowNanoseconds  15000871709
├─ logSubsystem       com.apple.hangtracer
├─ logCategory        
└─ occurrenceCount    12
2026-08-23T14:36:58.377Z  +4.8s    log.subsystems(logRecord)
├─ windowNanoseconds  15000871709
├─ logSubsystem       com.apple.UIKit
├─ logCategory        EventDispatch
└─ occurrenceCount    6
```


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