Feature summary
Page analysis by action=info should have a table of contents at the top when there are enough sections to warrant it. This could also be helpful on Special:Version.

Use case(s)
Visit "Page information" for any page to validate information for the page.

Benefits
Meanwhile many of the resulting pages became rather long.

• It does need some scrolling to reach the bottom.
• This is not good for mobile devices.
• It is even worse for accessibility.

Challenge
The TOC is not static.

• LINT errors may occur and trigger an additional section.
• If a page does not exist, there is a pageinfo but no history section.
• Further issues might occur in future.
• Site generated content might provide headlines, as in pageinfo-footer (example) or even pageinfo-header and could depend upon namespace, page existence etc.

A dynamic <h2> collection mechanism, grabbing the id= already present is required. Look for id="Logb.C3.BCcher" here.