Initial TrueGrowth source import

openspec/specs/seo-homepage/spec.md

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+# seo-homepage Specification
+
+## Purpose
+TBD - created by archiving change add-english-home-seo-page. Update Purpose after archive.
+## Requirements
+### Requirement: Localized SEO homepage
+The site SHALL provide an English SEO homepage with localized visible content, metadata, structured data, and a self-referencing canonical URL.
+
+#### Scenario: English homepage is crawlable
+- **WHEN** a crawler requests `/en/home.html`
+- **THEN** the response contains an English HTML document
+- **AND** the document declares `lang="en"`
+- **AND** the document includes indexable metadata and structured data for OpenTu
+- **AND** the canonical URL points to `https://opentu.ai/en/home.html`
+
+### Requirement: Localized homepage alternates
+The localized SEO homepages SHALL expose reciprocal alternate-language links.
+
+#### Scenario: Chinese and English homepages declare alternates
+- **WHEN** a crawler reads either `/home.html` or `/en/home.html`
+- **THEN** the document declares alternates for `zh-CN`, `en`, and `x-default`
+- **AND** each localized document keeps its own self-referencing canonical URL
+
+### Requirement: Localized homepage discovery
+The XML sitemap SHALL include the English homepage and its localized alternate relationship.
+
+#### Scenario: Sitemap lists localized homepages
+- **WHEN** a crawler reads `/sitemap.xml`
+- **THEN** the sitemap includes `https://opentu.ai/en/home.html`
+- **AND** the Chinese and English homepage entries include reciprocal localized alternates
+