# Form Fills Itself — effect skill for UI walkthroughs

> **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.

A cursor tabs through a short form; fields type, validate and the submit button resolves to success.

- **Type:** [Effect](https://varg.ai/how-to/effects.md) · [UI walkthroughs](https://varg.ai/how-to/browse/skills/ui.md)
- **Slug:** `form-fills-itself`
- **Status:** live
- **Publisher:** HeyGen (community)
- **License:** Apache-2.0
- **Source:** https://github.com/heygen-com/hyperframes/tree/main/registry/components/signup-flow
- **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 [Signup Flow](https://github.com/heygen-com/hyperframes/tree/main/registry/components/signup-flow) by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's.

Clean card with labeled inputs; each field focuses with a ring, types at human cadence, gets a check; button goes loading → success.

**When:** Show how fast sign-up or setup is ("30 seconds to your first project").

**Watch out:** Do not type real-speed long emails; keep values short and speed typing up 2–3×.

**Timing:** Each field 0.6–1.0 s; button loading 0.4 s; success check 0.4 s.

**Also called:** signup flow, input typing, onboarding form

### In HyperFrames

```bash
npx hyperframes add signup-flow
```
Pair with `input-feedback` for a shake on a wrong value before the correct one.

### In Remotion

```tsx
// npx shadcn@latest add @remocn/signup-flow
// or compose @remocn/input + @remocn/button with state = f(frame)
```

### In CapCut

Record the real form; speed up typing segments 2–3× (Speed → Normal); add click SFX.

### Ready-made components

- [Signup Flow](https://skills.varg.ai/component/hf.signup-flow/) (hyperframes): npx hyperframes add signup-flow
- [UI Signup Flow](https://skills.varg.ai/component/remocn.signup-flow/) (remocn): npx shadcn@latest add @remocn/signup-flow
- [Input Feedback](https://skills.varg.ai/component/hf.input-feedback/) (hyperframes): npx hyperframes add input-feedback

### Where this comes from

- [Jitter: UI element templates](https://jitter.video/templates/ui-elements)
- [Consensus: 5 tips to record the best product video](https://goconsensus.com/blog/5-crucial-tips-to-recording-the-best-product-video)

## Use when

- Show how fast sign-up or setup is ("30 seconds to your first project").

## Not for

- Do not type real-speed long emails; keep values short and speed typing up 2–3×.

## 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://s3.varg.ai/how-to/previews/f61de550d7bd/take-form-fills-itself.mp4 — The Signup Flow component used as its header comment describes, with demo copy (credit: Rendered by varg · HyperFrames Signup Flow, https://hyperframes.heygen.com/catalog/components/signup-flow)

## More UI walkthroughs skills

- [Zoom to the Action](https://varg.ai/how-to/skills/zoom-to-the-action.md): The full app establishes, then the camera pushes 1.5–2× into the part being used and eases back out.
- [3D Tilted Dashboard Reveal](https://varg.ai/how-to/skills/tilted-dashboard-reveal.md): The dashboard rises from a steep 3D tilt to flat, like a screen lifting toward the viewer.
- [Floating UI Panels in Depth](https://varg.ai/how-to/skills/floating-ui-panels.md): The interface splits into its panels, which float apart in depth with parallax, then snap back.
- [UI Builds Itself Piece by Piece](https://varg.ai/how-to/skills/ui-builds-itself.md): Grey skeleton blocks pulse once, then real cards, charts and text fill in with a stagger.
- [Before/After UI Wipe](https://varg.ai/how-to/skills/before-after-ui-wipe.md): A divider sweeps across one screen, turning the old version into the new one underneath.
- [Card Expands Into Detail](https://varg.ai/how-to/skills/card-expands-to-detail.md): A small card grows into a full detail panel in one continuous shape change.

## 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