---
title: Navigate advanced upgrades
---

> Agent instructions:
> **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown.
>
> - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version.
> - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt).

Upgrading from Kentico Xperience 13 (KX13) to Xperience by Kentico (XbyK) requires proper project structure, scenario planning, and effective use of AI tools.

This developer-focused resource covers how to structure upgrade repositories, match your scenarios to the right approach, and navigate topics like advanced data and code migration, optimization, and AI-assisted development.

> **Tip:** New to Xperience upgrades? Start with the [hands-on walkthrough](https://docs.kentico.com/guides/upgrade-to-xbyk/upgrade-walkthrough.md) first, then return here for advanced project structuring and scenario planning.