Pixel Lobster Skill

Pixel art desktop lobster that lip-syncs to OpenClaw TTS speech. Use when: (1) user wants a visual avatar for their AI agent, (2) user wants a desktop overlay that animates when their agent speaks, (3) user asks to set up or configure the pixel lobster. Guides the user to install, configure, and launch the bundled Electron app.

Pixel Lobster

A transparent desktop overlay featuring a pixel art lobster that animates when your OpenClaw agent speaks. Powered by envelope data from your local TTS server — the lobster's mouth only moves during AI speech, not music or system audio.

The app is fully bundled inside this skill — no external repository clone required.

Requirements

• Node.js 18+ with npx available
• A running TTS server exposing GET /audio/envelope (XTTS on port 8787, or any OpenAI-compatible TTS via the OpenClaw TTS proxy)
• Windows or Linux desktop (macOS not supported)

Install

The app is included in this skill at <skill_dir>/app/. Install dependencies once:

cd <skill_dir>/app
npm install

Configure

Edit <skill_dir>/app/config.json before launching. Key settings:

Key	Default	Description
audioMode	"tts"	"tts" reacts only to TTS speech; "system" captures all audio output
ttsUrl	"http://127.0.0.1:8787"	Base URL of your TTS server
monitor	"primary"	"primary", "secondary", "left", "right", or display index
lobsterScale	4	Sprite scale (4 = 480px tall lobster)
clickThrough	false	Start with click-through mode on so the lobster doesn't block clicks
swimEnabled	true	Enable swimming animation

Launch

cd <skill_dir>/app
npx electron .

Or use the included helper script (handles first-run npm install automatically):

bash <skill_dir>/scripts/launch.sh

Keyboard Shortcuts

Key	Action
F8	Move window to next monitor (cycles through all displays)
F9	Toggle click-through mode
F12	Toggle DevTools

OpenClaw Integration

With OpenClaw and a local XTTS server, set audioMode to "tts" and point ttsUrl at your XTTS instance. The lobster polls the envelope endpoint at 45ms intervals during active speech and 500ms when idle — no perceptible CPU cost.

If you use the OpenClaw TTS proxy (port 8788), point ttsUrl at port 8787 (the XTTS server directly), not the proxy — the envelope endpoint is on the TTS server, not the proxy layer.

Lip Sync Notes

If the mouth movement is ahead of or behind the audio:

• Mouth moves too early: increase ttsPlayStartOffsetMs (default 1100ms)
• Mouth moves too late: decrease ttsPlayStartOffsetMs

The default is tuned for PowerShell MediaPlayer on Windows. Other playback methods may need adjustment.

Mouth Shapes

Six visemes drive natural speech animation:

• A — wide open "ah"
• B — wide grin "ee"
• C — round "oh"
• D — small pucker "oo"
• E — medium "eh"
• F — teeth "ff"

Plus X (closed) for silence and pauses. Spring physics and variety enforcement prevent robotic repetition.