52 tagged newsletter, measured the same way as everything else here.
Browse within: agentic-workflows 18copilot 18llmops 18mkdocs 18journalism 15media-production 15youtube 15podcast 14email 13blog 7email-marketing 7content 6article 5essay 5
Skill Claude CodeCodex
Creates complete Agent Skills from user requirements. Use when the user wants to create, build, design, or generate a new skill, or when they describe automation, workflows, or specialized AI capabilities they want to package as reusable skills. Produces SKILL.md files, scripts, references, assets, and examples…
Skill Claude CodeCodex
Transforms the compiled Phase 3 working set into polished, newsletter-ready content sections, with Phase 1C discoveries used only as a missing-data fallback. Use when running Phase 3 of the newsletter pipeline. Selects and structures high-value items, applies GA/PREVIEW labels, and prepares complete section material…
Skill Claude CodeCodex
Fetches and extracts content from Phase 1A URL manifest into 5 interim files by source. Use when running Phase 1B of the newsletter pipeline. Processes URLs sequentially by source, extracts relevant items using universal extraction format, outputs one interim file per source. Keywords: content retrieval, phase 1b, web…
Skill Claude CodeCodex
Transforms content between formats and platforms. Use when user says 'turn this into', 'repurpose this as', 'make this a', 'atomize this', or 'reformat for'. Creates Twitter/X threads, LinkedIn posts, email newsletters, Instagram carousels, YouTube Shorts scripts, TikTok scripts, Threads posts, Bluesky posts, podcast…
AnthonyDavidAdams/substack-api-reference
Skill Claude CodeCodex
Use Substack's unofficial cookie-authenticated API to read posts, create drafts, publish issues, and manage publications on behalf of a logged-in Substack user. Required when the user asks to post to Substack, schedule a Substack send, mirror content to Substack, or extract data from a Substack account.
Skill Claude CodeCodex
Writes a short, high-click newsletter teaser for a published article — including subject line options, preview text, and the teaser body — ready to paste into an email newsletter platform.
Skill Claude CodeCodex
Writes the complete copy for a newsletter subscribe page — headline, subheadline, value proposition, social proof block, what-to-expect section, and call-to-action button text — optimised for conversion without resorting to hype or false urgency.
Skill Claude CodeCodex
Writes the in-email referral section that asks existing subscribers to share the newsletter with colleagues or friends — including the ask, the framing of the reward or reciprocity, and the specific share copy subscribers can use verbatim.
Skill Claude CodeCodex
Writes the in-newsletter section that asks free subscribers to upgrade to a paid tier, articulating the specific benefits of paid access in a way that is compelling without being pushy, matched to the newsletter's voice and reader relationship.
Skill Claude CodeCodex
Generates a formatted newsletter sponsorship rate card that documents placement options, audience metrics, pricing tiers, and terms — suitable for sending to prospective sponsors or publishing as part of a media kit.
Skill Claude CodeCodex
Takes a batch of reader comments, survey responses, or audience messages and returns a structured summary organized by theme, sentiment, and actionable takeaways — turning scattered feedback into a clear editorial brief.
Skill Claude CodeCodex
Plans a multi-edition content arc for a newsletter — mapping themes, topics, and recurring formats across a defined publishing period to give the publication editorial coherence and reader momentum rather than a disconnected series of standalone editions.
Skill Claude CodeCodex
Produces a practical audience segmentation brief for a newsletter, identifying 3-5 distinct subscriber groups with tailored content recommendations and messaging strategies for each segment.
Skill Claude CodeCodex
Writes a concise positioning brief that defines a newsletter's niche, primary differentiator, target reader, editorial promise, and what the publication refuses to do — giving the editor a clear decision-making framework and a document that can anchor copy across subscribe pages, pitches, and About pages.
Skill Claude CodeCodex
Writes a complete, publication-ready newsletter edition — opening hook, main feature, curated links section, and signed-off closing — from a brief and source material provided by the editor.
Skill Claude CodeCodex
Writes a targeted re-engagement email (or short sequence of two emails) for subscribers who have stopped opening the newsletter, designed to recover attention or prompt a clean unsubscribe before list hygiene becomes a deliverability problem.
Skill Claude CodeCodex
Drafts a thoughtful, on-brand response to a reader letter, subscriber email, or audience complaint — matching the publication's voice while addressing the reader's specific concern or question.
Skill Claude CodeCodex
Generates five distinct subject line options for a newsletter edition, each using a different psychological approach proven to improve open rates, matched to the publication's voice and the edition's content.
Skill Claude CodeCodex
Writes the automated welcome email that new subscribers receive immediately after signing up, establishing the newsletter's voice, making the editorial promise concrete, and setting expectations that reduce early unsubscribes.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: