Use this skill to draft LinkedIn posts in the user's voice. Trigger on `/linkedin-post-synthesis`, "draft a LinkedIn post about X", "write a post on Y", "let's write something for LinkedIn". Takes a topic + theme + brain dump, plus optional supporting context (paste, URLs, Obsidian paths, PDFs, screenshots, voice transcripts), and produces 3 post variants with rationale. Always combines the brand artifacts from `/personal-brand-coach` (`AI/PersonalBrand/`) AND a tone reference from `/generate-tone-reference` (`Writing/ToneReferences/*.md`) — both are required. There is NO bundled default fallback. If neither tone source exists, the skill refuses and pushes the user to boo…
