recommendation-excludes-watched

Status: IN

`get_feed` excludes videos the user has already watched from popular and content-based scores; collaborative filtering excludes them in its own co-occurrence logic.

Source: entries/2026/06/05/design-youtube-design_youtube.md

Depended on by

• read-paths-filter-by-entity-state
• read-responsibility-spans-convergence-and-filtering

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