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 llm-friendly-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/llm-friendly-site-architect)<a href="https://agentmods.dev/skills/sergekostenchuk/ui-ux-agent-skill-system/llm-friendly-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/ui-ux-agent-skill-system/llm-friendly-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/llm-friendly-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/ui-ux-agent-skill-system/llm-friendly-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 | $0.00098 | $0.00990 |
| Opus 5 | $0.00049 | $0.00495 |
| Sonnet 5 | $0.00020 | $0.00198 |
| Haiku 4.5 | $0.00010 | $0.00099 |
Grade A, and why
llm-friendly-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.
This is a copy
100% identical to llm-friendly-site-architect — 4 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.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LLM Friendly Site Architect
Use this skill after semantic core, URL architecture, internal link graph, and technical SEO/schema foundations exist.
Read references/llm-readable-architecture.md before producing a full LLM discovery plan.
Owns
llms.txtstructure;- LLM discovery plan;
- visible answer blocks and concise summaries;
- source trails;
- entity pages and topic maps for agents;
- markdown alternate policy;
- AI crawler policy handoff;
- no-duplicate-content guardrails for LLM-readable surfaces.
Does Not Own
- Search Console or assistant citation monitoring execution;
- technical schema implementation;
- URL/canonical decisions;
- hidden content;
- external authority placement.
Workflow
- Read
url-map.yaml,internal-link-graph.yaml, schema/head policy, and visible content model. - Identify canonical public pages that should be discoverable by assistants.
- Draft or audit
llms.txtsections with only public useful URLs. - Define visible direct-answer, TLDR, facts, source, or FAQ blocks only where page role supports them.
- Define source-trail and citation-ready evidence surfaces.
- Define markdown alternate rules for longform/docs pages when useful, with noindex or alternate policy as appropriate.
- Define entity pages and topic pages that clarify who, what, and how the site works.
- Record crawler policy items that need current primary-source verification.
- Produce an LLM discovery report using assets/llm-discovery-report.template.md.
Non-Negotiables
- Human-visible content first.
- No hidden bot-only facts.
- No doorway pages.
- No FAQPage schema unless FAQ is visible.
- No automatic TLDR on every short news page by default.
- No extra public story bodies beyond the declared content model.
llms.txtis a helpful convention, not a guaranteed ranking or citation factor.- Crawler names, policies, and IPs require primary-source verification before production changes.
What ships with it
5 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 · 100 lines · 98 tokens per session scan A 1d9e171fd977
llm-friendly-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 98 tokens to every session and 990 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to llm-friendly-site-architect, differing in 4 lines, and is treated as a copy.
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