Surfer SEO Content Cluster Planner

I want to build topical authority around [TARGET_KEYWORD] using Surfer SEO. Help me plan a complete content cluster.

Inputs:
- Primary target keyword: [TARGET_KEYWORD]
- Domain / brand: [DOMAIN]
- Target audience: [TARGET_AUDIENCE]
- Competitor domains to analyze: [COMPETITOR_DOMAINS]
- Current domain authority (approximate): [DOMAIN_AUTHORITY]
- Content goal: [CONTENT_GOAL] (e.g., rank for commercial intent, drive organic signups, build brand authority)

Please produce:
1. Pillar Page Brief -- Title, target keyword, search intent, recommended word count, 5 must-cover subtopics, and the primary CTA
2. 6 Supporting Article Briefs -- For each: title, target keyword, search intent (informational / commercial / navigational), recommended word count, and how it links to the pillar page
3. Internal Linking Map -- A table showing which articles link to which, with suggested anchor text for each link
4. Content Calendar -- A suggested 8-week publishing sequence ordered by topical dependency and link equity flow
5. Surfer SEO Tips -- 3 specific Surfer features to use for this cluster (e.g., Content Score targets, NLP terms to include, SERP Analyzer insights)

Format the output so it can be used directly as a Surfer SEO project brief.