Stop UserCred teleport from weighting likes by yesterday's mass - #174
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Stop UserCred teleport from weighting likes by yesterday's mass#174Pitchfork-and-Torch wants to merge 1 commit into
Pitchfork-and-Torch wants to merge 1 commit into
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Engagement teleport joined 7-day fav/RT edges onto the previous UserCred snapshot, so already-high-mass accounts minted more cred and new or small engagers were dropped by the inner join. Co-authored-by: Jon Bailey <Pitchfork-and-Torch@users.noreply.github.com>
This was referenced Sep 8, 2026
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Bug
computeTeleportWeightsbuilt today's engagement teleport by inner-joining 7-day fav/RT edges onto yesterday's UserCred mass. An engager with no prior snapshot row contributed nothing. An engager with high prior mass donated that mass to every author they liked.That is cred as an input to cred. Small and new accounts cannot confer authority. Elite like-rings reprint yesterday's ranking into today's teleport, then PageRank publishes tomorrow's prior.
Not the linked-pair filter. Not the premium uniform prior. Warm-start still reads the previous snapshot as the PageRank start vector only.
Proof
computeTeleportWeightsjoined(engagerId, authorId)fav/RT counts ontopriorMassPipe(previous UserCred snapshot, or uniform only onfirst_snapshot).engagerMass.mass * count / totalbecame today's teleport.doPageRankpluswriteResultswrote tomorrow'spriorMassPipe. New engagers died on the inner join.count / totalonly. Invalid / deactivated rows no longer mint cred from leftover mass.UserCredV2.score/isHighPageRankV2stop following last week's elite like-graph. Abuse skips and embeddinguser_credibilitystop treating small-account endorsements as zero.Fix
One function:
user-cred-v2/UserCredV2App.scalacomputeTeleportWeights. Call site drops the unused prior-mass argument.Not a home-mixer / VF / Thunder change. Not a fork PR.