31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# Sort Modes
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**Last Updated:** 2026-02-19
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**Confidence:** High
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## Summary
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25+ native sort modes available on any surface. The application names a sort mode; the database executes it. No application-side sorting logic required.
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**Key Facts:**
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- Sort modes are built-in, not formulas the application implements
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- Same sort mode works across different candidate sets (global, category, social graph)
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- Windowed top sorts: hour, today, week, month, year, all-time
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- Hot uses `log10(max(views, 1)) / (age_hours + 2)^gravity`; zero-view and one-view items tie because both numerators are zero
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- Trending is pure velocity (rate of change), distinct from Hot (cumulative with decay)
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- Controversial maximizes product of positive and negative signals
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**File Pointer:** `USE_CASES.md:635-663` (Appendix B)
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## Categories
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**Quality-based:** relevance, personalized, top_* (windowed), hidden_gems
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**Time-based:** new, old, hot, trending, rising
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**Engagement-based:** most_viewed, most_liked, most_commented, most_shared
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**Format-based:** shortest, longest, alphabetical_asc/desc
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**Special:** shuffle (quality-weighted random), live_viewer_count, date_saved, controversial
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## Related Topics
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- [Ranking Profiles](../services/ranking-profiles.md)
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- [Query Language](./query-language.md)
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