Abyssus
“the deep”
deepslowweightless
Deep blue water, with jellyfish glowing softly at the edges.
Glowing jellyfish drifting in deep blue water. Held still, as it is while you read.
The plate
Ocean blue in both modes. By night you are far below the surface, and jellyfish glow at the edges of the frame while specks of drifting matter hang in the dark. By day the water is shallow and pale, sun rays fall from the top edge and the same jellyfish show as faint pale shapes. While Claude works the jellyfish pulse and rise slowly, and the specks drift upward. When the answer is ready the water holds still.
While Claude works
The spinner takes one of these words in place of “Working”. When the app names the step it is on, that name stays.
- Sinking deeper
- Drifting
- Pulsing
- Sounding the depths
- Rising slowly
After a turn of 20 seconds or more, Abyssus plays a soft chime under a second and a half long.
With /tessera music, a quiet loop of its own plays while Claude works and stops when the answer is ready. It is off until you ask for it.
Palette
Light
- Page
#e0f2fa - Card
#e7f6fc - Panel
#eff9fe - Text
#133040 - Secondary
#304d5e - Muted
#476576
Dark
- Page
#052636 - Card
#0b2a3a - Panel
#122f3e - Menu
#183341 - Text
#d9e9f3 - Secondary
#b5cbd8 - Muted
#98b1bf
Roles
- Accent
#2e9fc9 - Danger
#cf6963 - Success
#4ba280 - Warning
#c59542 - Pro
#9d78c6
Measured
Standard contrast. Body text is held at 9:1 to 14:1. Here it measures 12:1 in light and 12.6:1 in dark. Calm accents.
| Reading | Light | Dark |
|---|---|---|
| Body text on the page | 12:1 | 12.6:1 |
| Muted text on the page | 5.4:1 | 7:1 |
| Page lightness | 95% | 25% |
| Glass | 70%, 20 pt blur | 70%, 20 pt blur |
Contrast is the WCAG ratio. Muted text is held at 4.5:1 or better. Lightness is OKLCH, where 0% is black and 100% is white.
Install
Hang Abyssus
-
1 In the desktop app
Click + next to the prompt box and choose Plugins. Add the marketplace btahir/tessera, then add the tessera plugin.
btahir/tessera -
2 In a terminal session
Paste this at the prompt.
/plugin install tessera --marketplace btahir/tessera -
3 Ask Claude
Send this sentence in any session.
Install the tessera plugin from the btahir/tessera marketplace on GitHub.
Then
The tessera plugin holds all twenty-five plates.
Type /tessera abyssus to hang Abyssus.
/tessera still stops the motion. Sound has three levels: /tessera quiet is silence,
/tessera sound is a chime after long turns (the default), and /tessera music adds the room's own
quiet loop while Claude works. Your choices are kept across sessions.
Only Abyssus
Each plate also installs by its own name, and its commands use that name, such as /abyssus still or /abyssus music.
/plugin install abyssus --marketplace btahir/tessera Where it shows
Themes appear in the Claude Code desktop and mobile apps. The terminal keeps its own colors. The chime plays on macOS only.