spec(skeleton): SD-0001 front matter + section skeleton from solution-design TEMPLATE

Anchors wiggleverse-ecomm#1; authored in session ecomm-0020.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

specs/SD-0001-mvp-sign-up-and-single-storefront.md

@@ -0,0 +1,146 @@
+# Solution Design: ecomm MVP — sign up and create a single storefront
+
+| | |
+| --- | --- |
+| **Anchor** | [wiggleverse/wiggleverse-ecomm#1](https://git.wiggleverse.org/wiggleverse/wiggleverse-ecomm/issues/1) (`type/feature`, `priority/P1`) |
+| **Author(s)** | Claude (session ecomm-0020), for Ben Stull |
+| **Reviewers / approvers** | Ben Stull |
+| **Status** | `draft` |
+| **Version** | v0.1.0 |
+| **Source artifacts** | BDD corpus: [research/shopify](https://git.wiggleverse.org/wiggleverse/wiggleverse-ecomm-prototype-content/src/branch/main/research/shopify) (esp. [flows/first-run-experience.md](https://git.wiggleverse.org/wiggleverse/wiggleverse-ecomm-prototype-content/src/branch/main/research/shopify/flows/first-run-experience.md)) · Prototype: [wiggleverse-ecomm-prototype](https://git.wiggleverse.org/wiggleverse/wiggleverse-ecomm-prototype) (R01–R07) · Reference: Shopify first-run experience · Supersedes: — |
+
+**Change log**
+
+| Date | Version | Change | By |
+| --- | --- | --- | --- |
+| 2026-06-10 | v0.1.0 | Initial draft (session ecomm-0020) | Claude |
+
+---
+
+## 1. Business Context
+
+*The business lens — solution-agnostic throughout. No mechanism is proposed until §2.*
+
+### 1.1 Executive Summary
+
+<!-- §1.1 pending -->
+
+### 1.2 Background
+
+<!-- §1.2 pending -->
+
+### 1.3 Business Actors / Roles
+
+<!-- §1.3 pending -->
+
+### 1.4 Problem Statement
+
+<!-- §1.4 pending -->
+
+### 1.5 Pain Points
+
+<!-- §1.5 pending -->
+
+### 1.6 Targeted Business Outcomes
+
+<!-- §1.6 pending -->
+
+### 1.7 Scope (business)
+
+<!-- §1.7 pending -->
+
+### 1.8 Assumptions · Constraints · Dependencies
+
+<!-- §1.8 pending -->
+
+### 1.9 Business Use Cases
+
+<!-- §1.9 pending -->
+
+---
+
+## 2. Solution Proposal
+
+<!-- §2 pending -->
+
+---
+
+## 3. Product Personas
+
+<!-- §3 pending -->
+
+## 4. Product Use Cases
+
+<!-- §4 pending -->
+
+## 5. UX Layout
+
+<!-- §5 pending -->
+
+## 6. Technical Design
+
+### 6.1 Invariants
+
+<!-- §6.1 pending -->
+
+### 6.2 High-level architecture
+
+<!-- §6.2 pending -->
+
+### 6.3 Data model & ownership
+
+<!-- §6.3 pending -->
+
+### 6.4 Interfaces & contracts
+
+<!-- §6.4 pending -->
+
+### 6.5 Per–Product-Use-Case design
+
+<!-- §6.5 pending -->
+
+### 6.6 Non-functional requirements & cross-cutting concerns
+
+<!-- §6.6 pending -->
+
+### 6.7 Key decisions & alternatives considered
+
+<!-- §6.7 pending -->
+
+### 6.8 Testing strategy
+
+<!-- §6.8 pending -->
+
+### 6.9 Failure modes, rollback & flags
+
+<!-- §6.9 pending -->
+
+## 7. Delivery Plan
+
+### 7.1 Approach / strategy
+
+<!-- §7.1 pending -->
+
+### 7.2 Slicing plan
+
+<!-- §7.2 pending -->
+
+### 7.3 Rollout / launch plan
+
+<!-- §7.3 pending -->
+
+### 7.4 Risks & mitigations
+
+<!-- §7.4 pending -->
+
+## 8. Traceability matrix
+
+<!-- §8 pending -->
+
+## 9. Open Questions & Decisions log
+
+<!-- §9 pending -->
+
+## 10. Glossary & References
+
+<!-- §10 pending -->