Extract the BriefingHighlight for a ## Strategic Intelligence Summary (or compatible) section. Prefers the first ### Sub-section heading as headline; falls back to the section's first prose paragraph when no sub-heading exists.
## Strategic Intelligence Summary
### Sub-section
Brief body
Resolved highlight, or null when the section is absent
null
Extract the BriefingHighlight for a
## Strategic Intelligence Summary(or compatible) section. Prefers the first### Sub-sectionheading as headline; falls back to the section's first prose paragraph when no sub-heading exists.