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openspec/specs/news-image-relevance-and-fallbacks/spec.md

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+## Purpose
+
+Canonical specification for news-image-relevance-and-fallbacks requirements synced from OpenSpec change deltas.
+
+## Requirements
+
+### Requirement: Image query fallback uses AI-focused defaults
+When extracted image keywords are insufficient, the system SHALL use AI-focused default fallback terms.
+
+#### Scenario: Empty keyword extraction
+- **WHEN** keyword extraction yields no usable topic keywords
+- **THEN** the system uses default fallback terms including AI-domain keywords (for example `ai`, `machine learning`, `deep learning`)
+
+### Requirement: Generic AI image fallback is guaranteed
+If provider lookups fail to return a usable summary image, the system SHALL use a generic AI-themed fallback image.
+
+#### Scenario: Provider chain failure
+- **WHEN** all configured image providers return no usable image
+- **THEN** the system assigns a generic AI fallback image URL/path for summary image
+
+### Requirement: Fallback behavior remains context-aware first
+The system SHALL attempt context-aware keyword retrieval before any generic fallback image is selected.
+
+#### Scenario: Context-aware attempt precedes fallback
+- **WHEN** summary image selection runs for a news item
+- **THEN** the system first attempts provider queries from extracted context-aware keywords
+- **AND** only falls back to generic AI image if these attempts fail