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 commands/ashikparvez89/larouex-fullstack-plugin/add-error-pagesgit clone --depth 1 https://github.com/Ashikparvez89/larouex-fullstack-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/ashikparvez89/larouex-fullstack-plugin/add-error-pages)<a href="https://agentmods.dev/commands/ashikparvez89/larouex-fullstack-plugin/add-error-pages"><img src="https://agentmods.dev/badge/commands/ashikparvez89/larouex-fullstack-plugin/add-error-pages.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00000 | $0.00120 |
| Opus 5 | $0.00000 | $0.00060 |
| Sonnet 5 | $0.00000 | $0.00024 |
| Haiku 4.5 | $0.00000 | $0.00012 |
Grade A, and why
add-error-pages 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 3d ago.
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.
This is a copy
100% identical to add-error-pages — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Create custom error pages for 404, 500, and offline scenarios. Design user-friendly error pages styled with Bootstrap matching brand identity. Add 404 page with helpful navigation links and popular pages. Implement 500 error page with contact options and status page link. Create offline page for progressive web app functionality. Add search functionality to find intended content. Implement "Did you mean?" suggestions based on URL. Include relevant illustrations or graphics. Add breadcrumb navigation where applicable. Ensure error pages are accessible with proper heading structure. Make pages responsive for all devices. Reference content-seo-agent for copy and SEO optimization.
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.
- 3d ago First seen · 2 lines · 0 tokens per session scan A d9d2897e7681
add-error-pages is a command published in the GitHub repository Ashikparvez89/larouex-fullstack-plugin (3 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 120 tokens. A static security scan graded it A with 0 findings. It is 100% identical to add-error-pages, differing in 0 lines, and is treated as a copy.
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