Adds a Learnings entry to the GDG presentation agent capturing
(1) the etymology line just added to slide 13, (2) the actual
data-slide value of the horse-harness analogy slide in this deck so
future cross-deck syncs can reference it, and (3) a forward-looking
rule for cross-deck mirroring: when an edit lands on the sister
best-practices deck and the same slide exists here (i.e. inherited
from the original fork), evaluate whether to mirror — generic content
mirrors cleanly, event-specific content does not. Also notes that
slides should be located by content, not by trusting "slide N", since
post-fork drift can shift numbering between the two decks.
Co-Authored-By: Claude <noreply@anthropic.com>
Shayan Rais
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