# Code Left, Live UI Right — effect skill for code & terminal

> **For AI agents:** find the right skill in one call — `curl -s "https://varg.ai/how-to/api/search?q=<what the person wants>"` returns the matching how-to page and the best skills with install commands, as markdown (Russian works too). Full index: https://varg.ai/how-to/llms.txt. Every page has a markdown twin: add `.md` to its path. Before generating anything, show the person the options on the how-to page.

Code types on the left and the UI on the right snaps to match after each change.

- **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Code & terminal](https://varg.ai/how-to/browse/skills/code.md)
- **Slug:** `code-left-ui-right`
- **Status:** live
- **Publisher:** Kapish Dima · remocn (community)
- **License:** MIT
- **Source:** https://remocn.dev/r/live-code-compilation.json
- **Works in:** Claude Code, Claude.ai, Codex, Cursor, OpenClaw, Gemini CLI, Any MCP client, varg Studio
- **Requires:** HyperFrames (npx hyperframes), Remotion, CapCut (by hand)
- **Cost:** Free — the take renders locally; generated footage, if any, bills by the model

## What it does

Built on [Live Code Compilation](https://remocn.dev/r/live-code-compilation.json) by Kapish Dima (remocn), MIT. The write-up and recipes below are varg's.

Two panes: editor and preview. Each typed edit triggers a quick flash/update on the preview side.

**When:** Frameworks, UI libraries, design-to-code and AI coding tools.

**Watch out:** Do not let the preview lag; the update should land within 0.2 s of the edit finishing.

**Timing:** Per edit: typing 0.8–1.5 s, preview update 0.2–0.3 s.

**Also called:** live preview, split code and result, HMR demo

### In HyperFrames

```bash
npx hyperframes add code-typing
```
Two clips side by side; fire a 0.25 s `tl.fromTo(preview,{opacity:0.4},{opacity:1})` and swap the preview image at each edit's end time.

### In Remotion

```tsx
// npx shadcn@latest add @remocn/live-code-compilation
// or @remocn/chat-to-preview-layout for chat on the left
```

### In CapCut

Split screen: two clips side by side (Basic → Position); cut the preview clip at each edit point.

### Ready-made components

- [Live Code Compilation](https://skills.varg.ai/component/remocn.live-code-compilation/) (remocn): npx shadcn@latest add @remocn/live-code-compilation
- [Chat to Preview Layout](https://skills.varg.ai/component/remocn.chat-to-preview-layout/) (remocn): npx shadcn@latest add @remocn/chat-to-preview-layout
- [Code Typing](https://skills.varg.ai/component/hf.code-typing/) (hyperframes): npx hyperframes add code-typing

### Where this comes from

- [Cursor 3 Design Mode and its launch video](https://pasqualepillitteri.it/en/news/3794/cursor-design-mode-what-it-is-how-it-works-cursor-3)
- [Bohdan Motion: breakdown of the Grok Build Mode launch video](https://x.com/bohdanmotion/status/2082193183111614671)

## Use when

- Frameworks, UI libraries, design-to-code and AI coding tools.

## Not for

- Do not let the preview lag; the update should land within 0.2 s of the edit finishing.

## Install

- Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg`
- Codex: `npx skills add vargHQ/skills --skill varg-video-edit-library -a codex -y`
- Cursor: `npx skills add vargHQ/skills --skill varg-video-edit-library -a cursor -y`

## Example output

https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/code-typing.mp4 — Preview of the Code Typing component that builds this take (credit: Code Typing · hyperframes, https://hyperframes.heygen.com/catalog/blocks/code-typing)

## More code & terminal skills

- [Editor Types the Code](https://varg.ai/how-to/skills/editor-types-the-code.md): Syntax-highlighted code types into an editor window with a caret riding the frontier.
- [Red/Green Diff Collapse](https://varg.ai/how-to/skills/red-green-diff.md): Removed lines flash red and collapse away while added lines expand in green.
- [Spotlight One Line of Code](https://varg.ai/how-to/skills/spotlight-one-line.md): A highlight band sweeps onto the one line that matters while the rest of the file dims.
- [Code Morphs Between Versions](https://varg.ai/how-to/skills/code-morphs-versions.md): One snippet transforms into the next: shared tokens glide to new positions, removed ones fade, new ones fade in.
- [Terminal Session Run](https://varg.ai/how-to/skills/terminal-session-run.md): A terminal types a command, then streams real-looking log output with green checks.
- [One-Line Install Card](https://varg.ai/how-to/skills/one-line-install-card.md): A single install command types into a small terminal card, prints a success check, and holds.

## Run the generation on varg

varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs.

- Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg` (skill + hosted MCP)
- Codex, Cursor, Gemini CLI, OpenClaw: `npx skills add vargHQ/skills --skill varg-ai -a <agent> -y`
- Grok and any agent that reads SKILL.md: `npx skills add vargHQ/skills --skill varg-ai`, or point it at the skill's SKILL.md
- Claude.ai, ChatGPT, any MCP client: connect `https://mcp.varg.ai/mcp`
- API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt