What problem does it solve? Writing Substack content that grows subscribers requires platform-specific knowledge most writers lack: email client rendering limits, the subscription-optimized algorithm, Notes strategy, SEO fields, and voice matching for ghostwriting. This Skill encodes that expertise into a structured workflow so drafts are formatted, optimized, and on-voice from the start. ## Core Features & Use Cases - Dual-format writing workflow: Handles both newsletter issues (email-first, subject lines, preview text, short paragraphs) and web posts (SEO title, meta description, URL slug, evergreen strategy) with distinct formatting rules for each. - Ghostwriting voice matching: Extracts voice markers from transcripts, talks, and writing samples to build a validated voice guide before drafting in someone else's style. - Growth and monetization guidance: Applies Substack algorithm mechanics, Notes testing pipelines, Recommendations strategy, and paid-tier timing advice based on subscriber count. - Use Case: A founder asks you to ghostwrite a newsletter issue about their Series B journey. The Skill first collects voice samples, builds a voice guide, interviews for topic and audience, proposes titles and hooks, then drafts an email-formatted issue with a Notes teaser and optional LinkedIn/Twitter distribution posts. ## Quick Start Ask the agent to write a Substack newsletter issue or web post on your topic, and answer its intake questions about audience, objective, format, and voice.