Challenge 2 — Solution

Task: A user asks for a cheat sheet on a topic. Explain, using SB7,
why the resulting page should NOT include a set of Hands-On Exercises
or a closing Quick Reference box, even though those are standard parts
of a Sidebar lesson.

SB7 is explicit that a cheat sheet is structurally different from a
Sidebar lesson, not a shorter version of one. A Sidebar lesson teaches
a topic - it builds up understanding through prose, worked examples,
and cross-references to existing courses, and its Hands-On Exercises
exist specifically to test and reinforce that understanding once it's
been built. A cheat sheet has no equivalent teaching arc to reinforce
in the first place - it's a dense, scannable reference someone
consults AFTER they already know the topic, purely to quickly recall
an exact command or piece of syntax.

Adding Hands-On Exercises to a cheat sheet would be adding a teaching
device to a page that was never trying to teach anything - there's no
lesson content for the exercises to be testing comprehension of. And
adding a closing Quick Reference box would be adding a summary on top
of a page that already IS nothing but a summary - SB7 makes this point
directly, calling a Quick Reference box on a cheat sheet "redundant"
for exactly this reason: the whole page already functions as the quick
reference, so a second one at the bottom would just be restating the
page's own content back to itself.

Notes:
- This distinction matters because it stops a cheat sheet from quietly
  drifting into being "a lesson, but shorter" over time - SB7 keeps
  its own shape deliberately different (a grid of category cards with
  dense command-description rows, a single short framing line instead
  of a full intro) specifically to prevent that drift.
- SB7 does allow ONE optional exception: a single closing tip/warning
  box for one genuinely important gotcha, if the topic has a real one
  worth flagging - but this is explicitly optional and narrow, not a
  disguised return of the lesson-style closing sections.