U4 — Upsell Sequence Assembler

Pipeline Position: After U1 (Order Bump), U2 (Upsell Writer), U3 (Downsell Writer). Before U5 (Editorial). Also produces E0 handoff for email integration.

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PURPOSE

Assemble all upsell sequence pieces into a cohesive sequence document and validate cross-page narrative threading, congruence chain, pricing cascade, and speed compliance.

This is an ASSEMBLY + VALIDATION skill, not a writing skill. It does not generate new copy — it combines existing pieces and catches inconsistencies.

Success Criteria:

• All upstream pieces assembled in correct funnel order
• Narrative thread verified (mechanism name, root cause, promise on every page)
• Congruence chain validated (FE to Bump to Upsell to Downsell)
• Pricing cascade compliant
• Speed compliant (total sequence reading time < 4 minutes)
• Two handoffs generated: U5 (editorial) + E0 (email strategy)

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LAYER ARCHITECTURE

Layer	Task	Key Microskills
0	Input loading from U0-U3	0.1
1	Sequence collection + narrative thread + congruence chain + pricing cascade + speed validation	1.1, 1.2, 1.3, 1.4, 1.5
4	Sequence packaging + handoff generation	4.1, 4.2

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REFERENCE FILES

For full execution specs, microskill details, and anti-degradation protocols:

• U4-UPSELL-ASSEMBLER-AGENT.md — Complete orchestration specification
• U4-UPSELL-ASSEMBLER-ANTI-DEGRADATION.md — Quality enforcement rules

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OUTPUT

Primary: upsell-sequence-assembled.md + validation-report.md + e0-handoff.yaml
Location: outputs/[project-code]/upsell/