Display Brightness

Name: Display Brightness
Author: BenchGrid-dev

ASecurity

Read or set screen brightness with brightnessctl. Use for any request about the screen being too bright or too dim. Linux only.

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Added September 29, 2026

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Scanned September 29, 2026

npx -y skills add BenchGrid-dev/slate --skill display-brightness --agent claude-code

Installs into .claude/skills of the current project.

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SKILL.md

---
name: slate-display-brightness
description: Read or set screen brightness with brightnessctl. Use for any request about the screen being too bright or too dim. Linux only.
---

# Display brightness

Use `brightnessctl`. Do not open a settings GUI for this.

```
brightnessctl get                 # current value
brightnessctl max                 # maximum
brightnessctl set 40%             # absolute
brightnessctl set 10%+            # relative
brightnessctl set 10%-
```

Tier: reversible. Undo: `brightnessctl set <previous>` (read it first with `get`).

## Verify

`brightnessctl get` prints the new value. On a VM or headless system there may be no backlight device; say so instead of trying GUI paths.