Email Sequence Generator

v1.1 — Generate professionally structured email sequences, newsletters, and A/B variants with CAN-SPAM/GDPR guidance, Cialdini persuasion psychology, and proven copywriting frameworks — an alternative to ConvertKit/Mailchimp content creation workflows included with your subscription.

Installation

1. Download the pf-email-sequences.plugin file
2. Open Claude Desktop and navigate to Settings > Plugins
3. Click Install Plugin and select the downloaded .plugin file
4. The plugin will be installed and available immediately

Note: All data stays local on your machine. No external API calls or cloud storage required.

The Problem

Email marketing tools charge $156-1,740/year for ConvertKit, Mailchimp, and ActiveCampaign. Yet the hardest part—writing compelling email copy—is still entirely manual. You're paying for delivery infrastructure, but doing all the creative work yourself.

The Solution

This plugin turns multi-hour email writing into a 15-minute workflow:

• Email Sequences: Plan and generate 3-7 email campaigns from a single goal description
• A/B Variants: Create strategic variants (emotional vs logical, curiosity vs urgency) automatically
• Newsletters: Transform bullet points into polished digests, personal updates, or promotional content
• Brand Consistency: Configure once, apply everywhere via .email/config.json

All outputs are plain text, HTML, or DOCX — copy directly into any ESP.

Quick Start

1. Initialize workspace:

   /email:email-setup
   

   Creates folder structure, brand voice config, checks dependencies.

2. Generate sequence plan:

   /email:email-plan Convert free trial users to paid subscribers in 14 days
   

   Creates a structured 3-7 email plan with topics, timing, CTA progression.

3. Generate full sequence:

   /email:email-sequence
   

   Writes all emails as DOCX ready to copy into your ESP.

Or use the shorthand:

/email:email-full Convert free trial users to paid in 14 days

Plan + generate in one step.

Commands Reference

Command	Purpose	Output
/email:email-setup	Initialize workspace, config, dependencies	.email/config.json
/email:email-plan [goal]	Generate sequence plan from goal	processing/email-sequence-plan.json
/email:email-draft [email# or topic]	Write single email (from plan or standalone)	processing/email-draft-{N}.json
/email:email-sequence	Generate full multi-email sequence as DOCX	outbound/email-sequence-{type}.docx
/email:email-ab [email#]	Generate A/B variants (subject, preview, opening)	outbound/ab-variants-{N}.json
/email:email-newsletter [format]	Generate newsletter from bullet points	outbound/newsletter-{date}.docx
/email:email-full [goal]	Plan + generate in one step	Both of above
/email:email-status	Show workspace health and inventory	Diagnostic report

How It Works

Goal Input
   ↓
/email:email-plan → Sequence Plan (3-7 emails, timing, CTAs)
   ↓
/email:email-sequence → DOCX (all emails as cohesive narrative)
   ↓
/email:email-draft → Individual email drafts (3 subject variants)
   ↓
/email:email-ab → A/B variants (9 total: subject, preview, opening)
   ↓
/email:email-newsletter → Standalone newsletters (digest, personal, promo)

DAG architecture: Skills work independently. Plan first if generating sequences; skip planning for standalone emails or newsletters.

Cost Comparison

Tool	Annual Cost (1K subs)	Writing	Delivery	Analytics
This Plugin	included with your subscription	✓ AI-powered	✗ (use ESP)	✗ (use ESP)
ConvertKit	$396-468/yr	✗ Manual	✓	✓
Mailchimp	$156-500/yr	✗ Manual	✓	✓
ActiveCampaign	$180-360/yr	✗ Manual	✓	✓

Key difference: This plugin writes the email content (the hardest part). Delivery and analytics stay in your existing ESP.

Feature Comparison

Feature	Plugin	ConvertKit	Mailchimp	ActiveCampaign
Email sequence writing	✓ Full	✗ Manual	✗ Manual	✗ Manual
A/B subject variants	✓ Full	✓ Manual	✓ Manual	✓ Auto
Newsletter drafting	✓ Full	✗ Manual	✗ Manual	✗ Manual
Brand voice consistency	✓ Config-driven	✗ None	✗ None	✗ None
Email delivery	✗ No	✓	✓	✓
Open/click analytics	✗ No	✓	✓	✓
Data privacy	✓ Local only	✗ Cloud	✗ Cloud	✗ Cloud
Export to any ESP	✓ DOCX/HTML	✗ Lock-in	✗ Lock-in	✗ Lock-in
Cost	included with your subscription	$396-468/yr	$156-500/yr	$180-360/yr
CAN-SPAM Guidance	✓ Auto-checked	✗ Manual	✗ Manual	✗ Manual
GDPR awareness	✓ Built-in	Partial	Partial	Partial
Copywriting frameworks	✓ AIDA/PAS/BAB/4Ps	✗ None	✗ None	✗ None
Persuasion psychology	✓ Cialdini principles	✗ None	✗ None	✗ None
Industry benchmarks	✓ Embedded	✗ None	✗ None	✗ None
A/B test methodology	✓ Statistical guidance	✗ Basic	✗ Basic	✓ Automated

AI-Powered Features

• Sequence Planning & Arc: Creates 3-7 email sequences with progressive CTAs and narrative coherence from goal description alone
• Brand Voice Consistency: Applies consistent tone, style, and personality across all emails using config-driven voice templates
• A/B Subject Variants: Generates strategic subject line variants mapped to Cialdini's 6 principles (reciprocity, social proof, authority, scarcity, liking, commitment)
• Personalization Token Insertion: Automatically embeds {{first_name}}, {{company_name}}, and {{product_name}} tokens — personalized subject lines get +26% higher open rates (Campaign Monitor)
• CAN-SPAM Guidance: Every generated email references required elements per 15 U.S.C. §7704 — honest subject lines, unsubscribe mechanism, physical postal address
• GDPR Awareness: Flags Art. 21(2)-(3) right-to-object requirements for EU/EEA recipients and Art. 6 lawful basis considerations
• CASL Compliance Guidance: References S.C. 2010, c. 23 express vs implied consent requirements for Canadian subscribers
• Copywriting Framework Selection: Automatically selects AIDA, PAS, BAB, or 4Ps framework based on email purpose — each email follows a proven persuasion structure
• Subject Line Optimization: Applies research-backed data — 6-10 word optimal length, mobile preview safety (35 chars), spam trigger avoidance, number/question lifts
• CTA Optimization: Single-CTA emails get +371% clicks (WordStream); uses specific action verbs and above-fold placement per benchmark data
• A/B Test Methodology: Includes 95% confidence thresholds, minimum sample sizes (1,000+ per variant), and test duration guidance for statistically valid results
• Industry Benchmarks: Embeds 2024-2025 open rate, CTR, and conversion benchmarks by email type (welcome 50-60%, abandoned cart 41-45%, newsletter 30-35%)
• Deliverability Guidance: References SPF (RFC 7208), DKIM (RFC 6376), DMARC (RFC 7489) authentication and spam trigger pattern avoidance
• FTC Endorsement Compliance: Flags 16 CFR Part 255 disclosure requirements when emails contain affiliate or sponsored content
• Centralized Knowledge Base: All domain knowledge in a single email-kb skill — compliance, frameworks, benchmarks — ensuring consistency across all 15 skills

Estimated Cost per Use

Disclaimer: Token estimates are approximate and based on typical usage patterns measured from skill prompt sizes. Actual costs vary with input data size, conversation length, and complexity. Estimates use Claude Sonnet 4.6 pricing ($3/1M input, $15/1M output). Cowork and Claude Desktop subscription users (Pro/Max/Team) are not charged per-token — these estimates apply only to direct Anthropic API usage. Running stages individually in fresh sessions uses fewer input tokens than running the full pipeline sequentially, because pipeline mode accumulates conversation history across stages.

Per skill (run individually in a fresh session):

Stage	Skill Prompt	User Input	Total Input	Output	Est. Cost
newsletter-draft	~4.4K	~800	~8.0K	~6.0K	~$0.11
ab-variants	~5.5K	~800	~9.1K	~5.5K	~$0.11
pf-email-marketing-post-purchase	~1.8K	~800	~5.4K	~3.0K	~$0.06
sequence-plan	~3.6K	~800	~7.2K	~3.6K	~$0.08
pf-email-marketing-seasonal	~2.2K	~800	~5.8K	~3.0K	~$0.06
email-campaigns-re-engage	~2.1K	~800	~5.8K	~3.0K	~$0.06
pf-email-marketing-win-back	~1.7K	~800	~5.3K	~3.0K	~$0.06
email-campaigns-welcome-sequence	~2.6K	~800	~6.2K	~3.0K	~$0.06
sequence-generate	~4.0K	~800	~7.6K	~6.0K	~$0.11
email-campaigns-subject-lines	~2.4K	~800	~6.0K	~3.0K	~$0.06
pf-email-marketing-product-launch	~1.8K	~800	~5.4K	~3.0K	~$0.06
email-kb	~7.5K	~800	~11.1K	~6.0K	~$0.12
email-draft	~3.6K	~800	~7.3K	~6.0K	~$0.11
pf-email-marketing-abandoned-cart	~2.1K	~800	~5.7K	~3.0K	~$0.06
Standalone total			~95.8K	~57.1K	~$1.14

Full pipeline (all stages in one session — context accumulates):

Stage	Base Input	+ History	Total Input	Output	Est. Cost
newsletter-draft	~8.1K	0	~8.1K	~6.0K	~$0.11
ab-variants	~9.2K	~6.8K	~16.0K	~5.5K	~$0.13
pf-email-marketing-post-purchase	~5.5K	~13.1K	~18.6K	~3.0K	~$0.10
sequence-plan	~7.3K	~16.9K	~24.2K	~3.6K	~$0.13
pf-email-marketing-seasonal	~5.9K	~21.3K	~27.2K	~3.0K	~$0.13
email-campaigns-re-engage	~5.9K	~25.1K	~31.0K	~3.0K	~$0.14
pf-email-marketing-win-back	~5.4K	~28.9K	~34.3K	~3.0K	~$0.15
email-campaigns-welcome-sequence	~6.3K	~32.7K	~39.0K	~3.0K	~$0.16
sequence-generate	~7.7K	~36.5K	~44.2K	~6.0K	~$0.22
email-campaigns-subject-lines	~6.1K	~43.3K	~49.4K	~3.0K	~$0.19
pf-email-marketing-product-launch	~5.5K	~47.1K	~52.6K	~3.0K	~$0.20
email-kb	~11.3K	~50.9K	~62.1K	~6.0K	~$0.28
email-draft	~7.4K	~57.7K	~65.0K	~6.0K	~$0.29
pf-email-marketing-abandoned-cart	~5.9K	~64.5K	~70.3K	~3.0K	~$0.26
Pipeline total			~542.0K	~57.1K	~$2.48

Running the full pipeline once typically costs $1.74–$3.23 in API tokens (Claude Sonnet 4.6).

Known Limitations

Limitation	Impact	Workaround
No email delivery	Can't send from plugin	Export DOCX/HTML to your ESP (Mailchimp, ConvertKit, etc.)
No subscriber analytics	No open/click tracking	Analytics stay in your ESP — plugin focuses on content creation
No persistent scheduling	Can't auto-schedule sends	Plugin generates timing recommendations. You configure drip schedule in ESP once.
LLM context window (~115K tokens)	Max 7 emails per batch	Generate first 7, then run again for part 2. Max 15 newsletter topics per batch.

Requirements

• Python 3.8+ (verified at setup)
• python-docx >= 0.8.11 (optional; installed automatically or falls back to Markdown)
• Cowork environment with LLM access

Architecture

Workspace structure:

my-emails/
├── inbound/              # Input: notes, bullet points, raw ideas
├── processing/           # Work-in-progress: plans and drafts
├── outbound/            # Finished deliverables: DOCX, JSON, ready to use
├── archive/             # Old sequences and reference materials
└── .email/
    ├── config.json      # Brand voice configuration
    └── logs/
        └── run-latest.log  # Execution history

Generation patterns:

• Sequence generation: Programmatic DOCX output using python-docx library (not templates)
• Email drafts: JSON intermediate format for composition and variant generation
• Newsletters: Programmatic DOCX with dynamic section counts

Important Disclaimers

• AI-Generated Content: This plugin uses AI (LLM) technology which can produce inaccurate or incomplete outputs. All content should be treated as a starting point and reviewed for accuracy before use.
• Not Professional Advice: Outputs do not constitute legal, financial, tax, medical, or other professional advice. Consult qualified professionals before making decisions based on generated content.
• No Compliance Guarantee: References to industry standards, regulations, or guidelines are for informational purposes only. This plugin does not guarantee compliance with any law or regulation. Users are responsible for verifying all outputs meet their specific regulatory requirements.
• No Endorsement or Affiliation: Mention of third-party products, standards, or organizations does not imply endorsement, partnership, or certification by those entities.