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 skills add sergekostenchuk/ui-ux-agent-skill-system --skill seo-llm-site-architectgit clone --depth 1 https://github.com/sergekostenchuk/ui-ux-agent-skill-systemWrote 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/skills/sergekostenchuk/ui-ux-agent-skill-system/seo-llm-site-architect)<a href="https://agentmods.dev/skills/sergekostenchuk/ui-ux-agent-skill-system/seo-llm-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/ui-ux-agent-skill-system/seo-llm-site-architect/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/sergekostenchuk/ui-ux-agent-skill-system/seo-llm-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/ui-ux-agent-skill-system/seo-llm-site-architect.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00127 | $0.02223 |
| Opus 5 | $0.00063 | $0.01111 |
| Sonnet 5 | $0.00025 | $0.00445 |
| Haiku 4.5 | $0.00013 | $0.00222 |
Grade A, and why
seo-llm-site-architect 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO LLM Site Architect
Goal
Act as a senior web/search architect. Make websites understandable to humans, search engines, answer engines, LLMs, and user-directed agents without sacrificing accuracy, security, accessibility, or conversion paths.
Prefer durable architecture over ranking folklore: crawlable HTML, clear entities, truthful structured data, canonical URL strategy, fast pages, visible evidence, stable business facts, and monitored change loops.
Non-Negotiables
- Verify current primary-source docs before changing crawler policy, AI-search policy, or anything described as "latest". Crawler names, IP verification, and AI search surfaces change often.
- Do not promise rankings, citations, AI Overview inclusion, ChatGPT answers, or crawler compliance. State evidence and residual uncertainty.
- Do not add structured data for content that is not visible to users on the page.
- Do not place secrets, private URLs, customer data, unreleased content, or internal instructions in public files such as
llms.txt, markdown alternates, sitemaps, or JSON-LD. - Treat
llms.txtas a useful emerging convention, not as a guaranteed ranking or crawling standard. - Keep SEO edits scoped to the site's existing framework, routing, metadata helpers, CMS model, and deployment constraints.
Cross-Skill Coordination
Use this skill with ui-ux-llm-product-architect when a task touches both public discoverability and interface experience.
- This skill owns: crawl/index architecture, canonical routes, metadata,
robots.txt, sitemaps,llms.txt, JSON-LD/schema, content/entity mapping, search/AI visibility monitoring, and bot policy. llm-friendly-site-optimizerowns: tactical LLM-citation audits,llms.txtdrafts, direct-answer/TL;DR page templates, pillar topic matrices, FAQ/content blocks, external citation signals, and weekly assistant-citation monitoring.ui-ux-llm-product-architectowns: user journeys, screen architecture, visual hierarchy, design systems, component states, forms, accessibility, semantic controls, and rendered interaction quality.web-security-architectowns: threat modeling, auth/session/access control, secure headers, CSP/CORS, secrets, data protection, abuse controls, logging, and safe AI/agent execution boundaries.- Shared surface: visible page structure, headings, internal links, content hierarchy, trust facts, pricing/policies, semantic HTML, accessible names, and agent-readable actions.
- Source of truth: visible user-facing content first. Metadata, JSON-LD, OpenGraph,
llms.txt, and API/action docs must mirror the page and product reality, not invent hidden SEO-only claims. - Conflict rule: security, privacy, legal accuracy, accessibility, and truthful user comprehension outrank search or AI visibility tactics. Do not weaken auth, CSP, CORS, cookies, rate limits, or private-content boundaries for discoverability.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 125 lines · 127 tokens per session scan A cd0d8bb4c104
seo-llm-site-architect is a skill published in the GitHub repository sergekostenchuk/ui-ux-agent-skill-system (23 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 127 tokens to every session and 2,223 once invoked, about $0.0006 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 2026-08-30.
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