feat: umbrella anchors with GoF sub-patterns#159
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Add support for :sub-anchors:, ☔, and :tier: AsciiDoc attributes in extract-metadata.js. Update GoF Design Patterns with :sub-anchors: listing all 23 patterns. Create first sub-anchor (GoF-Strategy Pattern) as proof of concept. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Filter anchors with ☔ attribute from main catalog. Add anchor-card-umbrella CSS class with ::before/::after pseudo-elements creating a stacked card visual effect. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Export fetchAnchorsData() from data-loader.js, reusing the existing fetchData() cache to provide anchor metadata to the modal component. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Render sub-anchor list in umbrella modal with tier-based styling: Tier-1 bold with accent border, Tier-2 normal, Tier-3 greyed out. Add back button for navigating from sub-anchor back to umbrella. Add EN/DE i18n keys for umbrella UI. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Create individual .adoc files for all remaining GoF Design Patterns: - Tier 1 (strong anchors): Observer, Factory Method, Singleton, Adapter, Decorator, Command, Facade, Template Method, Builder, State, Proxy - Tier 2 (valid anchors): Abstract Factory, Composite, Iterator, Mediator, Chain of Responsibility, Bridge, Prototype - Tier 3 (not anchors): Flyweight, Interpreter, Memento, Visitor Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
6 new E2E tests covering: stacked card visual, sub-anchor filtering, modal sub-anchor list, back-button navigation, tier-3 greying out. Fix lint warning in card-grid test. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Remove pseudo-element stacking effect (overflow/z-index issues). Instead show "X Sub-Anchors" meta-badge on umbrella cards. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This was referenced Mar 9, 2026
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Summary
:sub-anchors:attribute:sub-anchors:,:umbrella:,:tier:Test plan
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