- Cap trending base_score at 18.0 (was unbounded — a viral channel could
score 240+ vs search's 15, making everything else invisible)
- Cap all discovery scores at 50.0 globally so no single signal dominates
- Fix score accumulation: cap accumulated total at 50.0 (was unbounded
across repeated runs, cementing high-score channels in top positions forever)
- Expire unseen queue entries older than 14 days at start of each run
- Add ±8 score perturbation to discovery list endpoint (was pure score DESC,
identical every visit until dismissed)
- Add score perturbation to discovery_videos ORDER BY too
- Fix SQL injection in update_category_clusters (category strings were
interpolated directly into query; now use parameterized queries per category)
- Raise category signal score from 3.0 → 5.0 to compensate for trending cap
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Mattias Thall
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