llm-friendly-site-architect

llm-friendly-site-architect is a skill for Codex from sergekostenchuk/seo-llm-skill-cluster. It costs 98 tokens per session (975 once invoked), scanned A, original, MIT.

A skill for making website information easier for AI assistants, retrieval systems, and agent-based search to find and understand.

In plain words
What is it for?
Use it to plan llms.txt, visible summaries and answer sections, source trails, entity pages, topic maps, markdown versions of long pages, and AI crawler policies.
Why use it?
It helps turn useful public pages into clear discovery and evidence surfaces, while avoiding duplicate or hidden content. llms.txt is a file that points AI systems to relevant pages.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: mentions Codex.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 <codex-skills-dir>/senior-skill-architect/scripts/lint_production_skill.py ./skills/llm-friendly-site-architect.

Good fit Use it to plan llms.txt, visible summaries and answer sections, source trails, entity pages, topic maps, markdown versions of long pages, and AI crawler policies.

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Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/sergekostenchuk/seo-llm-skill-cluster
agentmods
npx agentmods add skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect

Made for: Codex.

Wrote 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.

agentmods badge for llm-friendly-site-architect

README.md
[![agentmods](https://agentmods.dev/badge/skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect/github.svg)](https://agentmods.dev/skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect)
Your own site
<a href="https://agentmods.dev/skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/seo-llm-skill-cluster/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.

agentmods 80×15 button for llm-friendly-site-architect

Your own site · 80×15
<a href="https://agentmods.dev/skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/seo-llm-skill-cluster/llm-friendly-site-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 975 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00098 $0.00975
Opus 5 $0.00049 $0.00487
Sonnet 5 $0.00020 $0.00195
Haiku 4.5 $0.00010 $0.00097

Measured 12d ago against content hash 83f2dcda4357, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/llm-friendly-site-architect/SKILL.md · 100 lines

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.txt structure;
  • 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

  1. Read url-map.yaml, internal-link-graph.yaml, schema/head policy, and visible content model.
  2. Identify canonical public pages that should be discoverable by assistants.
  3. Draft or audit llms.txt sections with only public useful URLs.
  4. Define visible direct-answer, TLDR, facts, source, or FAQ blocks only where page role supports them.
  5. Define source-trail and citation-ready evidence surfaces.
  6. Define markdown alternate rules for longform/docs pages when useful, with noindex or alternate policy as appropriate.
  7. Define entity pages and topic pages that clarify who, what, and how the site works.
  8. Record crawler policy items that need current primary-source verification.
  9. 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.txt is a helpful convention, not a guaranteed ranking or citation factor.
  • Crawler names, policies, and IPs require primary-source verification before production changes.

Read the full file on GitHub · 100 lines

Files

What ships with it

6 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.

Changes

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.

  1. 12d ago First seen · 100 lines · 98 tokens per session scan A 83f2dcda4357

Subscribe to this mod's changes

llm-friendly-site-architect is a skill published in the GitHub repository sergekostenchuk/seo-llm-skill-cluster (39 stars, last pushed 3mo ago), licensed MIT. It adds 98 tokens to every session and 975 once invoked, about $0.0005 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.