Message House Builder Derives launch-specific messaging from accepted L1 Narrative canon and positioning evidence: a message house, PR-FAQ spine, and per-channel angle packs. It never turns launch copy into a competing brand canon and never adjudicates claims. Scope guard : this skill turns an existing positioning canvas into messaging only. It does not build the positioning itself (positioning-mapper is the sole upstream — if the canvas is missing, route there first and stop), write finished blog posts or pages (content-writer), produce ad or email units (ad-creative-builder / email-creative…