Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/dev-lou/pixelpilot/uiux-error-pagesgit clone --depth 1 https://github.com/dev-lou/PixelPilotWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.04141 | $0.04141 |
| Opus 5 | $0.02070 | $0.02070 |
| Sonnet 5 | $0.00828 | $0.00828 |
| Haiku 4.5 | $0.00414 | $0.00414 |
Grade A, and why
PixelPilot uiux-error-pages.instructions.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 551 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UI/UX Error Pages
Custom error pages that match your design system. Professional, helpful, and token-aware.
OVERVIEW
This skill covers custom error pages:
- 404 - Page Not Found
- 403 - Forbidden
- 419 - Session Expired (Laravel)
- 429 - Too Many Requests
- 500 - Server Error
- 503 - Service Unavailable
All pages share navbar/footer and use design tokens.
LARAVEL STRUCTURE
resources/views/
├── errors/
│ ├── 404.blade.php
│ ├── 403.blade.php
│ ├── 419.blade.php
│ ├── 429.blade.php
│ ├── 500.blade.php
│ ├── 503.blade.php
│ └── layout.blade.php
└── layouts/
└── app.blade.php
ERROR LAYOUT
{{-- resources/views/errors/layout.blade.php --}}
<!DOCTYPE html>
<html lang="{{ str_replace('_', '-', app()->getLocale()) }}" data-theme="light">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>@yield('title') — {{ config('app.name') }}</title>
<link rel="stylesheet" href="{{ asset('css/app.css') }}">
{{-- Error page specific styles --}}
<style>
.error-page {
min-height: 100vh;
display: flex;
flex-direction: column;
}
.error-page__content {
flex: 1;
display: flex;
align-items: center;
justify-content: center;
padding: var(--space-8);
}
.error-page__container {
max-width: 560px;
text-align: center;
}
.error-page__code {
font-size: clamp(6rem, 20vw, 10rem);
font-weight: 800;
line-height: 1;
color: var(--muted);
opacity: 0.5;
margin-bottom: var(--space-4);
}
.error-page__title {
font-size: var(--text-3xl);
font-weight: 700;
color: var(--text);
margin-bottom: var(--space-4);
}
.error-page__message {
font-size: var(--text-lg);
color: var(--text-secondary);
margin-bottom: var(--space-8);
line-height: 1.6;
}
.error-page__actions {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: var(--space-4);
}
.error-page__search {
margin-top: var(--space-8);
max-width: 400px;
margin-inline: auto;
}
.error-page__search-form {
display: flex;
gap: var(--space-2);
}
.error-page__search-input {
flex: 1;
padding: var(--space-3) var(--space-4);
border: 1px solid var(--border);
border-radius: var(--radius-md);
font-size: var(--text-base);
}
.error-page__illustration {
max-width: 300px;
margin: 0 auto var(--space-8);
}
.error-page__illustration svg {
width: 100%;
height: auto;
}
</style>
</head>
<body class="error-page">
{{-- Include shared navbar --}}
@include('partials.navbar')
<main class="error-page__content">
<div class="error-page__container">
@yield('content')
</div>
</main>
{{-- Include shared footer --}}
@include('partials.footer')
<script src="{{ asset('js/app.js') }}"></script>
</body>
</html>
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 551 lines · 4,141 tokens per session scan A 665d93889666
PixelPilot uiux-error-pages.instructions.md is an instructions file published in the GitHub repository dev-lou/PixelPilot (2 stars, last pushed 4mo ago), licensed MIT. It adds 4,141 tokens to every session, about $0.0207 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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