Draft a cornerstone/pillar page outline for a broad topic

You're planning content architecture for a WordPress security company's blog. The
topic is "[WordPress Security]", broad enough that a single post covering everything
would either be shallow or 8,000 words no one finishes.

TOPIC: [WordPress Security]
EXISTING RELATED POSTS (already published, don't duplicate): [
"How to Choose a Security Plugin", "What to Do After a Site Gets Hacked",
"Two-Factor Authentication Setup Guide"]
AUDIENCE STAGE: [mostly early-stage, searching "is my wordpress site secure" type
queries, not yet comparing specific plugins]

Work through this before outlining:
1. List the subtopic clusters a search-and-read audience actually splits this topic
   into (common attack vectors, hardening steps, plugin choices, backup/recovery,
   monitoring), based on how people actually search, not a brainstormed list of
   everything security-related.
2. Decide what belongs ON the pillar page itself (a solid overview paragraph and a
   clear link out) versus what needs its OWN cluster article, if a subtopic needs
   more than 150-200 words to do justice, it's a cluster article, not a pillar
   section.
3. Edge case: cross-check each planned cluster topic against the existing posts
   listed above. If a subtopic is already covered, the pillar page should link to
   that existing post instead of outlining new content that would compete with it
   for the same keywords.
4. Order the pillar page's sections by the audience's actual journey: foundational
   understanding first, prevention second, response/recovery third, ongoing
   monitoring last, matching the "early-stage" audience note above rather than a
   pillar page that assumes the reader already picked a plugin.
5. For each section, note the target anchor text for the internal link and whether
   the linked piece exists already or needs to be commissioned.

Produce the outline as: pillar page H1, then each H2 section with a 1-2 sentence
summary of what goes ON the pillar page, the cluster article title it links to, and
whether that cluster article is existing or needs to be written.

Replace the bracketed topic, existing posts, and audience stage above with your own.