Write a 4-week newsletter content plan for {{target_audience}} in the {{industry}} industry. Use a {{tone}} tone. The goal is to {{goal}}. Send weekly.

Output structure:
- For each week: 3 subject line options, theme, opening hook, main story (200-300 words), quick tip, resource recommendation, CTA, and an engagement element.
- Include a Content Strategy Notes section: narrative arc, trending topics, key metrics, subject line formulas.
- Include a Growth Tactics section: 3 list growth strategies, 1 referral mechanism, cross-promotion ideas.

Keep total output under 1800 words. Ensure all recommendations are specific to the industry and audience with actionable one-week steps.