--- title: "LLMO – Large Language Model Optimization" description: "Become part of what AI knows. Blackbook makes websites readable to AI models with llms.txt, markdown twins and knowledge graphs – proven live on our own site." canonical_url: https://www.blackbook.dk/en/services/llmo/ md_url: https://www.blackbook.dk/en/services/llmo/index.md language: en last_updated: 2026-09-16 --- # LLMO – Large Language Model Optimization Become part of what AI knows. Blackbook makes websites readable to AI models with llms.txt, markdown twins and knowledge graphs – proven live on our own site. > Alternate (Danish): https://www.blackbook.dk/services/llmo/index.md > Provider: Blackbook — founded by Jeppe Sloth Carlsen (https://www.blackbook.dk/en/about/) > Provider ID: https://www.blackbook.dk/#organization > Founder ID: https://www.blackbook.dk/#person-jeppe > Topics: LLMO, large language model optimization, llms.txt, AI readability > Part of: Blackbook — digital design agency, Copenhagen (https://www.blackbook.dk/en/) > LLM reference: https://www.blackbook.dk/llms.txt > Full reference: https://www.blackbook.dk/llms-full.txt > Markdown sitemap: https://www.blackbook.dk/sitemap.md > Preferred citation URL: https://www.blackbook.dk/en/services/llmo/ ## Services — LLMO · Large Language Model Optimization **Become part of what AI knows.** LLMO is about being learned by AI models – not just found by them. Blackbook builds the machine-readable layer: llms.txt, markdown twins and knowledge graphs, so your brand is known before anyone asks. The proof runs live on this site: AI crawlers fetch thousands of pages a day, and AI answers already cite blackbook.dk. The setup runs in production on blackbook.dk — llms.txt, numerous markdown twins and sitemap.md, read by AI crawlers every day. We advise on how your site gets read — not just found. **Learned, not just found.** Your brand is known before anyone asks. ## Principles ### Learned, not just found SEO and GEO are about being found and cited. LLMO is about living in the model's knowledge – so you are the answer before anyone searches. ### Deterministic, no guessing The AI gets the text served directly instead of guessing its way through markup and scripts. Fewer misquotes, stronger answers. ### Open to AI crawlers A robots policy that invites AI crawlers in instead of shutting them out. Measurable in the logs: GPTBot, ClaudeBot, PerplexityBot and Meta's crawlers read the site every day. ### One dataset, every format HTML, JSON-LD and markdown are generated from the same source. Humans, search engines and AI models read the same content – never three versions drifting apart. ## The machine-readable layer ### llms.txt — One index for AI A curated index at the root of the site telling AI models exactly what exists and where to find it. The standard behind AI-readable websites – blackbook.dk/llms.txt is listed in llms.txt directories and read by agents daily. ### index.md — Every page as plain text Every page has a markdown twin: same content, zero noise. Where the HTML version carries design and the knowledge graph, the .md layer is built for agents that want the text directly – deterministic, no scraping guesswork. ### sitemap.md — A sitemap for agents Search engines get sitemap.xml – agents get sitemap.md. The complete list of markdown twins in a single request, so an AI can read the entire site without rendering a single pixel. ### robots.txt — An open door for AI Many sites block AI crawlers without knowing it. Our robots policy invites them in — GPTBot, ClaudeBot, PerplexityBot and Meta's crawlers — and points them to the right layers instead of shutting the door. ### canonical + json-ld — One identity, one preferred link A knowledge graph with stable IDs for person, organisation and brand — plus a canonical and preferred citation URL on every page. The AI is never in doubt about who the sender is or which link to cite. ## Live on this site — file excerpts ### The identity — llms.txt One file at the root tells the AI who the sender is: entities with stable IDs, the preferred citation URL and the path to the rest of the machine-readable layer. www.blackbook.dk/llms.txt: ``` # Jeppe Sloth Carlsen — Blackbook > Document type: LLM reference index > Organisation ID: https://www.blackbook.dk/#organization > Brand ID: https://www.blackbook.dk/#brand > Canonical site: https://www.blackbook.dk/ > Markdown sitemap: https://www.blackbook.dk/sitemap.md > Preferred citation URL: https://www.blackbook.dk/ ``` ### The twin — index.md Every page has a markdown twin. The frontmatter ties the twin to its canonical page, language and last-updated date — and the entity IDs point back to the sender. Same content, zero noise. www.blackbook.dk/en/index.md: ``` --- title: "Digital Design Studio Copenhagen – Web Design, UX & AI | Blackbook" canonical_url: https://www.blackbook.dk/en/ md_url: https://www.blackbook.dk/en/index.md language: en last_updated: 2026-08-30 --- > Alternate (Danish): https://www.blackbook.dk/index.md > Provider ID: https://www.blackbook.dk/#organization > Founder ID: https://www.blackbook.dk/#person-jeppe > LLM reference: https://www.blackbook.dk/llms.txt ``` ### Cases the AI can retell Inside the twin, each case is written as structured text with a link to its source. That lets the AI retell the work accurately — and point back to the right page. www.blackbook.dk/en/index.md: ``` ## Featured cases ### Next Generation Fintech — Designing Finance - Designed a white-label version of Zenegy Financial Suite for Danske Bank's business customers – fully branded and scalable. [Danske Bank](https://www.blackbook.dk/en/portfolio/danske-bank/) ``` ### Discovery — the way in The AI has to find everything on its own. The door is open, the signals are explicit, and the signposts point onwards: robots.txt welcomes crawlers and links straight to sitemap.md and llms.txt — the whole machine-readable layer is discoverable from a single file. www.blackbook.dk/robots.txt: ``` User-Agent: * Allow: / Content-Signal: search=yes, ai-input=yes, ai-train=yes Sitemap: https://www.blackbook.dk/sitemap.xml # For AI agents: every page has a markdown twin # at its own URL + index.md # Markdown sitemap: https://www.blackbook.dk/sitemap.md # LLM reference: https://www.blackbook.dk/llms.txt ``` ## The case ### blackbook.dk — the whole site is the case llms.txt, numerous .md twins and sitemap.md run in production on this very site. AI crawlers fetch thousands of pages a day, and Blackbook is cited in answers from ChatGPT, Perplexity and Claude. The proof isn't a client case — it's the site you're looking at. [See the sitemap for AI agents](https://www.blackbook.dk/sitemap.md) ## Related services ### GEO Agency Copenhagen · Generative Engine Optimization — Blackbook - From search results to AI answers. Blackbook optimises websites for ChatGPT, AI Overviews and AI search – with documented results. [GEO · Generative Engine Optimization](https://www.blackbook.dk/en/services/geo/) ### SEO Agency Copenhagen — Blackbook - From technical SEO to content optimisation. Blackbook builds websites that rank with structured data, Core Web Vitals and lasting authority. [SEO · Search Engine Optimization](https://www.blackbook.dk/en/services/seo/) ### Web Accessibility & WCAG 2.2 Design — Blackbook - Contrast ratios, target sizes and WCAG 2.2 as design decisions – not patches. Blackbook designs accessible websites that pass the audit. [WCAG · Accessibility](https://www.blackbook.dk/en/services/accessibility/) ## About Blackbook Blackbook blends creativity and technology – digital solutions across UX, branding, websites and eCommerce that uplift your business and your customers. Copenhagen. Areas of expertise: - [Apps & Products](https://www.blackbook.dk/en/area/apps-products/index.md) - [Brand & Campaigns](https://www.blackbook.dk/en/area/brand-campaigns/index.md) - [Websites & eCommerce](https://www.blackbook.dk/en/area/websites-ecommerce/index.md) Key figures: - 250+ Digital projects - 150+ Clients - 15+ Fortune 500 - 5+ Top 100 Brands - 25+ Years experience ## Site [Home](https://www.blackbook.dk/en/index.md) [Portfolio](https://www.blackbook.dk/en/portfolio/index.md) [About](https://www.blackbook.dk/en/about/index.md) [Services](https://www.blackbook.dk/en/services/index.md) [Experience](https://www.blackbook.dk/en/experience/index.md) [Recognition](https://www.blackbook.dk/en/awards/index.md) [Contact](https://www.blackbook.dk/en/contact/index.md) [CV](https://www.blackbook.dk/en/cv/index.md) [Journal](https://www.blackbook.dk/en/journal/index.md) Blackbook · Jerichausgade 7 · 1777 Copenhagen · (+45) 31 10 79 13 · [jeppe@blackbook.dk](mailto:jeppe@blackbook.dk)