For each assigned block of a learning guide on the topic "{topic}", identify WHAT a beginner with no prior knowledge needs to understand. You are not yet writing guide text — you only gather the contents that will be taught later.

You are assigned the following chapters and blocks — binding: every assigned block must appear, invent no additional ones. Beneath each block are its SUBBLOCKS with their learning-path level (`[beginner]`/`[advanced]`/`[expert]`) — the sub-points that get taught:
{assignment}

{facts}

Guiding principle: only the **essentials**. Superfluous material harms learning — gather what a beginner REALLY needs, not everything one could possibly say.

Gather per block:
- Core points / learning goals: what must the reader grasp? Cover EVERY listed subblock with EXACTLY the one central core point — not several overlapping ones. If a block has no subblocks, gather 3-7 concise points.
- Prerequisites: which terms/ideas must one already know to understand this? Each explainable in half a sentence — these are the anchor points for newcomers.
- Typical hurdles: where do beginners typically misunderstand it or stumble?
- Cited facts (versions, names, values) — nothing unsupported; verify anything uncertain via web search.
- One concrete example idea ONLY where an example genuinely carries the understanding — not dutifully for every subblock.
- Scope: only what THIS block yields. No more, no less. Don't inflate something mentioned in passing into a topic.

Write all gathered content in GERMAN (the guide is for German-speaking learners), even though these instructions are in English.

Write ONLY the file {out_path} — one section marker per block (title EXACTLY from the assignment), with the points beneath it:

<!-- section: exact block title -->
- Core point …
- Core point …
Prerequisite: what must be briefly explained beforehand (anchor)
Hurdle: typical beginner misconception
Example: short idea of what the example shows

Write the marker line exactly like that. No text outside the sections, no prose guide.
{extra}