Add multi-platform export generator (single source of truth)
Make the library multi-platform without duplicating content. Each skills/<name>/SKILL.md body remains the single source of truth; a new generator renders platform-ready exports from it. - scripts/build-exports.mjs — dependency-free Node generator with a PLATFORMS registry so new platforms (Gemini, Cursor, …) are a few lines. Ships ChatGPT exports at exports/chatgpt/<bundle>/<skill>/SYSTEM_PROMPT.md (172 skills), plus generated index READMEs. Supports --platform and --check. - exports/ — generated ChatGPT system prompts, ready to paste into a Custom GPT. - .github/workflows/check-generated.yml — fails a PR if exports or web/skills.json drift from the source skills. - README "Works With" now documents the ready-to-use exports and regen command. - CHANGELOG + SKILL-AUTHORING-STANDARD note the generated artifacts. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016JWn5jRD5tcEFKrubjQ6Px
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# Email Campaign Skill
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This skill writes complete, sequenced email campaigns — from welcome flows to product launches to re-engagement sequences. Each email is written with subject line, preview text, full body copy, and CTA.
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## Required Inputs
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Ask the user for these if not provided:
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- **Campaign goal** (onboard new users / launch a product / nurture leads / re-engage churned users / announce a feature)
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- **Audience** (who receives this? job title, lifecycle stage, what they know already)
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- **Product or offer** being promoted or introduced
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- **Number of emails in sequence** (if unsure, recommend based on goal)
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- **Tone** (professional / conversational / bold / educational)
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- **Sender name** (person or brand?)
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## Sequence Recommendations by Goal
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If the user hasn't specified number of emails, use these defaults:
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- **Onboarding:** 4 emails over 7 days (Day 0, Day 1, Day 3, Day 7)
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- **Product launch:** 3 emails (Teaser → Launch Day → Follow-up/Last chance)
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- **Lead nurture:** 5 emails over 2 weeks
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- **Re-engagement:** 3 emails (Gentle nudge → Value reminder → Final offer)
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- **Feature announcement:** 2 emails (Announcement → How-to/deep dive)
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## Output Structure Per Email
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For every email in the sequence, produce:
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---
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**Email [N] of [Total] — [Descriptive label e.g. "Welcome / Day 0"]**
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**Send timing:** [When relative to trigger event or previous email]
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**Subject line:** [Primary option]
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**Subject line (A/B variant):** [Alternative to test]
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**Preview text:** [40–90 characters — adds context to the subject, doesn't repeat it]
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**Body:**
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[Full email copy — formatted with clear opening line, 2–3 body paragraphs, one primary CTA]
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**CTA button text:** [3–6 words]
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**CTA destination:** [What page/action this should link to]
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**Strategic note:** [Why this email does what it does — the psychological or strategic intent. 1–2 sentences.]
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---
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## Writing Rules
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- Opening line must earn attention — no "Hi, welcome to [product]" openers
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- Each email has ONE primary CTA — never two competing asks
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- Keep paragraphs to 2–3 sentences maximum for mobile readability
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- Use "you" more than "we" — centre the reader, not the brand
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- Subject lines under 50 characters perform best on mobile — flag if going over
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- Preview text should add information the subject doesn't — never just repeat it
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- Every email should stand alone — assume some subscribers miss earlier emails
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## Quality Checks
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- [ ] Each email has a single clear CTA
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- [ ] Subject lines are under 50 characters (or flagged)
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- [ ] Preview text doesn't repeat the subject line
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- [ ] Opening line is specific and attention-earning
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- [ ] Sequence has logical narrative arc (doesn't feel like disconnected blasts)
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- [ ] Tone is consistent across all emails
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- [ ] Strategic notes explain the intent of each email
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## Anti-Patterns
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- [ ] Do not include more than one primary CTA per email — competing calls to action reduce click-through by splitting attention
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- [ ] Do not open with "Hi, welcome to [product]" or any variation of a generic greeting — the opening line must earn attention immediately or recipients stop reading
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- [ ] Do not write preview text that repeats the subject line — preview text is a second chance to earn the open, not a repeat of the first chance
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- [ ] Do not write a sequence where each email restates the same value proposition — each email must advance the narrative or serve a distinct purpose in the buyer's journey
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- [ ] Do not assume all subscribers receive all emails — each email must stand alone for subscribers who missed earlier messages in the sequence
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## Example Trigger Phrases
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- "Write a 3-email launch sequence for [product]"
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- "Build an onboarding email flow for [SaaS tool]"
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- "Create a drip campaign to nurture leads for [offer]"
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- "Write a re-engagement campaign for churned users"
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