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nexu-io/open-design/plugins/_official/examples/webgl-neon-grid/SKILL.md

webgl-neon-grid

A real-time synthwave scene — a perspective floor grid scrolling toward a banded retro sun under a neon starfield, all from one fragment shader. No textures. Rendered as a single self-contained `index.html`. Use when the brief asks for "synthwave", "outrun", "retro 80s", "neon grid", "perspective grid", "vaporwave", or a retro-futuristic hero. Open Design serves this in powered-preview mode so the GPU stack actually runs.

Source repository stars
82,073
Declared platforms
0
Static risk flags
0
Last source update
2026-07-28
Source checked
2026-07-28
DecisionCompatibilityInstallWorkflowPermissionsEvidenceSource

Decision brief

What it does—and where it fits

Produce a single self-contained index.html that renders a real-time synthwave scene full-screen — a perspective floor grid, a banded retro sun, and a starfield — with a clean typographic overlay on top.

Best for

  • Use when the brief asks for "synthwave", "outrun", "retro 80s", "neon grid", "perspective grid", "vaporwave", or a retro-futuristic hero.

Not for

  • Tasks that require unconfirmed production actions or broad system permissions.
  • Environments where the pinned source and install steps cannot be inspected.

Compatibility matrix

Platform support, with evidence labels

PlatformStatusEvidenceWhat to check
CodexNot declaredNo explicit evidencePortability before use
Claude CodeNot declaredNo explicit evidencePortability before use
CursorNot declaredNo explicit evidencePortability before use
Gemini CLINot declaredNo explicit evidencePortability before use
Open the compatibility checker

Installation

Inspect first. Install second.

The source command is displayed only when detected. A safe inspection prompt is always available so your agent can explain every action before execution.

Source-detected install commandSource
npx skills add https://github.com/nexu-io/open-design --skill "plugins/_official/examples/webgl-neon-grid"
Safe inspection promptEditorial

Inspect the Agent Skill "webgl-neon-grid" from https://github.com/nexu-io/open-design/blob/89d6d4ef21baf80f871595abdf6f7de6e941dd44/plugins/_official/examples/webgl-neon-grid/SKILL.md at commit 89d6d4ef21baf80f871595abdf6f7de6e941dd44. List every install step, command, network request, credential, file read/write, external action, and rollback step. Explain whether it fits my task. Do not install or execute anything until I approve.

Workflow

What the source asks the agent to do

  1. 01

    Workflow

    Read example.html end to end. Note the shape: a horizon split; above the horizon a sky gradient, a circular sun cut by horizontal scanline bands, and hashed stars; below the horizon a perspective floor grid (z = k / depth, x = uv.x z) that scrolls with time, its lines thinning a…

    Outrun (default): magenta→indigo sky, orange→pink banded sun, cyan/magenta grid.Vaporwave: pastel teal + pink, softer sun, wider grid spacing.Terminal: near-monochrome green grid on black for a colder, hacker read.
  2. 02

    Step 0 — Read the reference

    Read example.html end to end. Note the shape: a horizon split; above the horizon a sky gradient, a circular sun cut by horizontal scanline bands, and hashed stars; below the horizon a perspective floor grid (z = k / depth, x = uv.x z) that scrolls with time, its lines thinning a…

    Read example.html end to end. Note the shape: a horizon split; above the horizon a sky gradient, a circular sun cut by horizontal scanline bands, and hashed stars; below the horizon a perspective floor grid (z = k / dep…
  3. 03

    Step 1 — Choose the palette

    Synthwave lives on its gradient: - Outrun (default): magenta→indigo sky, orange→pink banded sun, cyan/magenta grid. - Vaporwave: pastel teal + pink, softer sun, wider grid spacing. - Terminal: near-monochrome green grid on black for a colder, hacker read.

    Outrun (default): magenta→indigo sky, orange→pink banded sun, cyan/magenta grid.Vaporwave: pastel teal + pink, softer sun, wider grid spacing.Terminal: near-monochrome green grid on black for a colder, hacker read.
  4. 04

    Step 2 — Build index.html

    One file, zero external requests. Fullscreen triangle + fragment shader.

    One file, zero external requests. Fullscreen triangle + fragment shader.Project the floor with a simple perspective divide; derive grid lines from abs(fract(gv) - 0.5) and a distance-scaled line width so far lines don't alias.Fade the grid into a horizon haze and add a hot horizon band; band the sun with sin(y f) cuts on its lower half.

Permission review

Static risk signals and limitations

No configured static risk pattern was detected

This is not proof of safety. Runtime behavior, indirect dependencies, and hidden external systems are outside the static scan.

Evidence record

Why each signal appears

EvidenceSourceComputedTestedEditorial
SignalValueEvidence typeMeaning
Quality score77/100ComputedDocumentation, specificity, maintenance, and trust rules
Repository stars82,073SourceRepository attention, not individual Skill quality
Compatibility0 platformsSourceDeclared in the catalog source record
Usage guideautomated source guideEditorialGenerated or reviewed according to the visible evidence level

Pinned source

Provenance and original SKILL.md

Repository
nexu-io/open-design
Skill path
plugins/_official/examples/webgl-neon-grid/SKILL.md
Commit
89d6d4ef21baf80f871595abdf6f7de6e941dd44
License
Apache-2.0
Collected
2026-07-28
Default branch
main
View the original SKILL.md

Neon Grid Skill

Produce a single self-contained index.html that renders a real-time synthwave scene full-screen — a perspective floor grid, a banded retro sun, and a starfield — with a clean typographic overlay on top.

Why this is a powered artifact

Open Design detects getContext('webgl2') and renders this file in powered preview — a cross-origin-isolated iframe with allow-same-origin. The full GPU pipeline is available; you do not need to work around the opaque sandbox.

Resource map

webgl-neon-grid/
├── SKILL.md      ← you're reading this
└── example.html  ← a working synthwave grid + sun shader (READ FIRST)

Workflow

Step 0 — Read the reference

Read example.html end to end. Note the shape: a horizon split; above the horizon a sky gradient, a circular sun cut by horizontal scanline bands, and hashed stars; below the horizon a perspective floor grid (z = k / depth, x = uv.x * z) that scrolls with time, its lines thinning and fading with distance. Everything is analytic — no raymarch needed.

Step 1 — Choose the palette

Synthwave lives on its gradient:

  • Outrun (default): magenta→indigo sky, orange→pink banded sun, cyan/magenta grid.
  • Vaporwave: pastel teal + pink, softer sun, wider grid spacing.
  • Terminal: near-monochrome green grid on black for a colder, hacker read.

Step 2 — Build index.html

  • One file, zero external requests. Fullscreen triangle + fragment shader.
  • Project the floor with a simple perspective divide; derive grid lines from abs(fract(gv) - 0.5) and a distance-scaled line width so far lines don't alias.
  • Fade the grid into a horizon haze and add a hot horizon band; band the sun with sin(y * f) cuts on its lower half.
  • Compile shaders with error logging so a typo fails loudly, not silently black.

Step 3 — Overlay + brand

  • Map the accent colors to the active DESIGN.md when one is present; otherwise the outrun palette above, with the kicker in lime #63fe13.
  • Headline ≤ 12ch plus one supporting line. Keep the horizon and sun as the hero.

Step 4 — Self-review (P0)

  • Renders continuously at ~60fps; the FPS badge updates.
  • Grid reads as receding perspective and scrolls smoothly toward the horizon.
  • Sun bands and horizon glow are visible; far grid lines fade without aliasing.
  • Resizes crisply on window resize (no stretching / blur).
  • Degrades to a message (not a blank page) if webgl2 is unavailable.

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