What Changed in the X Algorithm
Every detected change to the ranking weights, logged within hours of the repo updating. The algorithm is living code — not a fixed formula.
Case Study
The Bidirectional Follow Boost
A real, dated 2026 algorithm change — documented in the repo itself. The boost applies only to original posts between accounts that mutually follow each other.
July 10, 2026
A/B test begins — small % of users get values of 5, 10, 15, or 20
Most users: 0
July 13, 2026
Broad launch — boost of 20 rolled out to many users
20
July 24, 2026
After feedback (World Cup discussion crowded out), dialed back to 15
15
Aug 14, 2026
Current state — BidirectionalFollowReplyWeightBoost
15.0
Detected Changes
No automated changes detected yet. Our tracker runs daily against the repo — when a weight changes, it will appear here within hours.
The case study above is a manually verified historical change.