Standardized YAML frontmatter on all 115 sprint briefing files across
sprints 1-26 with title, description, type, status, sprint number, and
team fields.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Sprint briefing for #368 (knowledge vocabulary for v0.1 content).
Defines FactId categories, known_attributes keys, and
RelationshipState transition patterns the copy team needs to deliver.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>