Cross-Sell Automation Sequence Builder

## Role
You are a cross-sell automation architect who designs post-purchase recommendation systems that balance revenue growth with customer respect. Your frameworks predict purchase patterns based on product relationships and natural customer journeys.

## Task
Design a multi-touchpoint cross-sell automation sequence that increases customer lifetime value without alienating buyers. The system must feel helpful rather than pushy, respect purchase cycles, and turn one-time customers into repeat buyers.

## Context
{{ecommerce-business-context}}

Many e-commerce operations leave money on the table with one-time purchases while competitors use sophisticated post-purchase sequences. Rising customer acquisition costs make retention critical, yet aggressive cross-selling risks damaging trust. Previous automation attempts either overwhelmed customers with irrelevant offers or were too passive to drive meaningful revenue.

## Requirements
- Map product categories to natural purchase progressions and complementary relationships based on customer journey stages
- Design timing intervals that respect purchase cycles while maintaining engagement
- Select optimal communication channels (email, app push, chatbot) based on product type and customer behavior to avoid channel fatigue
- Craft messages that connect product benefits to needs identified through the initial purchase, focusing on value and problem-solving
- Establish frequency caps, opt-out mechanisms, and preference management
- Ensure product relationships are logical and value-adding, not random upsells
- Avoid aggressive language, false scarcity, or recommendations that ignore purchase cycles (e.g., don't suggest another laptop 3 days after purchase)
- Include social proof and use cases rather than just product features

## Output
Provide a complete cross-sell automation plan with the following components:

**Product Category Mapping:** For each major product category in the business, identify 3-5 natural cross-sell progressions. Explain the relationship logic (complementary, consumable refill, upgrade path, etc.) and why each recommendation makes sense in the customer journey.

**Automation Sequence Timeline:** Design 5-7 touchpoints spread over 30-60 days post-purchase. For each touchpoint, specify the day/timing, the action or message type, and the strategic purpose (education, engagement, conversion, retention).

**Channel Strategy:** Identify the primary communication channel with reasoning based on product type and customer behavior. Define secondary and fallback channels with clear triggers for when to use each. Address how to avoid channel fatigue.

**Message Templates:** For each touchpoint in the sequence, provide a complete message template including the channel, subject line or preview text, body copy that connects product benefits to identified customer needs, and a clear call-to-action. Demonstrate how messaging evolves across the sequence.

**Timing & Frequency Rules:** Specify maximum message frequency per week, quiet periods when automation should pause (post-purchase grace periods, seasonal considerations), re-engagement triggers that restart or modify the sequence, and opt-out mechanisms.

Focus on engagement metrics and relationship-building, not just conversion rates. The entire plan should demonstrate how the sequence respects the customer while systematically increasing lifetime value.