# Koi Pond Hero

> Calm full-bleed hero over a living koi pond: a GPU wave simulation refracts a pebble floor with caustics, koi drawn in shader swim, school and cast shadows, and lily pads with blooms ride the swell. The cursor trails ripples and a tap drops food the koi race for. Moonlit in dark mode. WebGL2, no three.js.

- Slug: `koi-pond-hero`
- Category: [Heroes](https://www.assembli.design/category/heroes.md)
- Type: block
- Tags: 3d, webgl, shader, simulation, water, calm, interactive
- npm dependencies: motion, lucide-react
- shadcn/ui dependencies: button
- Added: 2026-10-15
- Live preview: https://www.assembli.design/preview/koi-pond-hero
- Page: https://www.assembli.design/components/koi-pond-hero

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://www.assembli.design/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://www.assembli.design/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/koi-pond-hero/koi-pond-hero.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/koi-pond-hero
```

Registry item JSON: https://www.assembli.design/r/koi-pond-hero.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.