[cr-mixer/home-mixer] Remove getLinearRankingParams in EarlybirdTensorflowBasedSimilarityEngine

Remove unused ranking params which are specified by services when making an Earlybird relevance search.

For cr-mixer: since we always set useTensorflowRanking = true in EarlybirdSimilarityEngineRouter, we will only ever use the TensorFlowBasedScoringFunction for ranking search results. That function doesn't rely on any of the linear params specified in getLinearRankingParams, nor the boosts because we set applyBoosts = false in the request. These parameters are therefore strictly redundant.

The parameters in home-mixer can be removed for essentially the same reason—the parameters are redundant given that we use the Tensorflow scoring function and don't apply boosts.

README.md

@@ -26,7 +26,7 @@ These are the main components of the Recommendation Algorithm included in this r
 | Tweet mixing & filtering | [home-mixer](home-mixer/README.md) | Main service used to construct and serve the Home Timeline. Built on [product-mixer](product-mixer/README.md). |
 |                          | [visibility-filters](visibilitylib/README.md) | Responsible for filtering Twitter content to support legal compliance, improve product quality, increase user trust, protect revenue through the use of hard-filtering, visible product treatments, and coarse-grained downranking. |
 |                          | [timelineranker](timelineranker/README.md) | Legacy service which provides relevance-scored tweets from the Earlybird Search Index and UTEG service. |
-| Software framework | [navi](navi/navi/README.md) | High performance, machine learning model serving written in Rust. |
+| Software framework | [navi](navi/README.md) | High performance, machine learning model serving written in Rust. |
 |                    | [product-mixer](product-mixer/README.md) | Software framework for building feeds of content. |
 |                    | [twml](twml/README.md) | Legacy machine learning framework built on TensorFlow v1. |
 

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/similarity_engine/EarlybirdTensorflowBasedSimilarityEngine.scala

@@ -6,8 +6,6 @@ import com.twitter.search.earlybird.thriftscala.EarlybirdService
 import com.twitter.search.earlybird.thriftscala.ThriftSearchQuery
 import com.twitter.util.Time
 import com.twitter.search.common.query.thriftjava.thriftscala.CollectorParams
-import com.twitter.search.common.ranking.thriftscala.ThriftAgeDecayRankingParams
-import com.twitter.search.common.ranking.thriftscala.ThriftLinearFeatureRankingParams
 import com.twitter.search.common.ranking.thriftscala.ThriftRankingParams
 import com.twitter.search.common.ranking.thriftscala.ThriftScoringFunctionType
 import com.twitter.search.earlybird.thriftscala.ThriftSearchRelevanceOptions
@@ -97,7 +95,7 @@ object EarlybirdTensorflowBasedSimilarityEngine {
       // Whether to collect conversation IDs. Remove it for now.
       // collectConversationId = Gate.True(), // true for Home
       rankingMode = ThriftSearchRankingMode.Relevance,
-      relevanceOptions = Some(getRelevanceOptions(query.useTensorflowRanking)),
+      relevanceOptions = Some(getRelevanceOptions),
       collectorParams = Some(
         CollectorParams(
           // numResultsToReturn defines how many results each EB shard will return to search root
@@ -116,13 +114,11 @@ object EarlybirdTensorflowBasedSimilarityEngine {
   // The specific values of recap relevance/reranking options correspond to
   // experiment: enable_recap_reranking_2988,timeline_internal_disable_recap_filter
   // bucket    : enable_rerank,disable_filter
-  private def getRelevanceOptions(useTensorflowRanking: Boolean): ThriftSearchRelevanceOptions = {
+  private def getRelevanceOptions: ThriftSearchRelevanceOptions = {
     ThriftSearchRelevanceOptions(
       proximityScoring = true,
       maxConsecutiveSameUser = Some(2),
-      rankingParams =
+      rankingParams = Some(getTensorflowBasedRankingParams),
-        if (useTensorflowRanking) Some(getTensorflowBasedRankingParams)
-        else Some(getLinearRankingParams),
       maxHitsToProcess = Some(500),
       maxUserBlendCount = Some(3),
       proximityPhraseWeight = 9.0,
@@ -131,41 +127,12 @@ object EarlybirdTensorflowBasedSimilarityEngine {
   }
 
   private def getTensorflowBasedRankingParams: ThriftRankingParams = {
-    getLinearRankingParams.copy(
+    ThriftRankingParams(
       `type` = Some(ThriftScoringFunctionType.TensorflowBased),
       selectedTensorflowModel = Some("timelines_rectweet_replica"),
+      minScore = -1.0e100,
       applyBoosts = false,
       authorSpecificScoreAdjustments = None
     )
   }
-
-  private def getLinearRankingParams: ThriftRankingParams = {
-    ThriftRankingParams(
-      `type` = Some(ThriftScoringFunctionType.Linear),
-      minScore = -1.0e100,
-      retweetCountParams = Some(ThriftLinearFeatureRankingParams(weight = 20.0)),
-      replyCountParams = Some(ThriftLinearFeatureRankingParams(weight = 1.0)),
-      reputationParams = Some(ThriftLinearFeatureRankingParams(weight = 0.2)),
-      luceneScoreParams = Some(ThriftLinearFeatureRankingParams(weight = 2.0)),
-      textScoreParams = Some(ThriftLinearFeatureRankingParams(weight = 0.18)),
-      urlParams = Some(ThriftLinearFeatureRankingParams(weight = 2.0)),
-      isReplyParams = Some(ThriftLinearFeatureRankingParams(weight = 1.0)),
-      favCountParams = Some(ThriftLinearFeatureRankingParams(weight = 30.0)),
-      langEnglishUIBoost = 0.5,
-      langEnglishTweetBoost = 0.2,
-      langDefaultBoost = 0.02,
-      unknownLanguageBoost = 0.05,
-      offensiveBoost = 0.1,
-      inTrustedCircleBoost = 3.0,
-      multipleHashtagsOrTrendsBoost = 0.6,
-      inDirectFollowBoost = 4.0,
-      tweetHasTrendBoost = 1.1,
-      selfTweetBoost = 2.0,
-      tweetHasImageUrlBoost = 2.0,
-      tweetHasVideoUrlBoost = 2.0,
-      useUserLanguageInfo = true,
-      ageDecayParams = Some(ThriftAgeDecayRankingParams(slope = 0.005, base = 1.0))
-    )
-  }
-
 }

home-mixer/server/src/main/scala/com/twitter/home_mixer/util/earlybird/RelevanceSearchUtil.scala

@@ -15,28 +15,6 @@ object RelevanceSearchUtil {
       `type` = Some(scr.ThriftScoringFunctionType.TensorflowBased),
       selectedTensorflowModel = Some("timelines_rectweet_replica"),
       minScore = -1.0e100,
-      retweetCountParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 20.0)),
-      replyCountParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 1.0)),
-      reputationParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 0.2)),
-      luceneScoreParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 2.0)),
-      textScoreParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 0.18)),
-      urlParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 2.0)),
-      isReplyParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 1.0)),
-      favCountParams = Some(scr.ThriftLinearFeatureRankingParams(weight = 30.0)),
-      langEnglishUIBoost = 0.5,
-      langEnglishTweetBoost = 0.2,
-      langDefaultBoost = 0.02,
-      unknownLanguageBoost = 0.05,
-      offensiveBoost = 0.1,
-      inTrustedCircleBoost = 3.0,
-      multipleHashtagsOrTrendsBoost = 0.6,
-      inDirectFollowBoost = 4.0,
-      tweetHasTrendBoost = 1.1,
-      selfTweetBoost = 2.0,
-      tweetHasImageUrlBoost = 2.0,
-      tweetHasVideoUrlBoost = 2.0,
-      useUserLanguageInfo = true,
-      ageDecayParams = Some(scr.ThriftAgeDecayRankingParams(slope = 0.005, base = 1.0)),
       selectedModels = Some(Map("home_mixer_unified_engagement_prod" -> 1.0)),
       applyBoosts = false,
     )

visibilitylib/src/main/resources/config/com/twitter/visibility/decider.yml

@@ -494,6 +494,9 @@ visibility_library_enable_trends_representative_tweet_safety_level:
 visibility_library_enable_trusted_friends_user_list_safety_level:
   default_availability: 10000
 
+visibility_library_enable_twitter_delegate_user_list_safety_level:
+  default_availability: 10000
+
 visibility_library_enable_tweet_detail_safety_level:
   default_availability: 10000
 
@@ -758,7 +761,7 @@ visibility_library_enable_short_circuiting_from_blender_visibility_library:
 visibility_library_enable_short_circuiting_from_search_visibility_library:
   default_availability: 0
 
-visibility_library_enable_nsfw_text_topics_drop_rule:
+visibility_library_enable_nsfw_text_high_precision_drop_rule:
   default_availability: 10000
 
 visibility_library_enable_spammy_tweet_rule_verdict_logging:

visibilitylib/src/main/scala/com/twitter/visibility/configapi/configs/DeciderKey.scala

@@ -535,6 +535,9 @@ private[visibility] object DeciderKey extends DeciderKeyEnum {
   val EnableTrustedFriendsUserListSafetyLevel: Value = Value(
     "visibility_library_enable_trusted_friends_user_list_safety_level"
   )
+  val EnableTwitterDelegateUserListSafetyLevel: Value = Value(
+    "visibility_library_enable_twitter_delegate_user_list_safety_level"
+  )
   val EnableTweetDetailSafetyLevel: Value = Value(
     "visibility_library_enable_tweet_detail_safety_level"
   )
@@ -869,8 +872,8 @@ private[visibility] object DeciderKey extends DeciderKeyEnum {
     "visibility_library_enable_short_circuiting_from_search_visibility_library"
   )
 
-  val EnableNsfwTextTopicsDropRule: Value = Value(
+  val EnableNsfwTextHighPrecisionDropRule: Value = Value(
-    "visibility_library_enable_nsfw_text_topics_drop_rule"
+    "visibility_library_enable_nsfw_text_high_precision_drop_rule"
   )
 
   val EnableSpammyTweetRuleVerdictLogging: Value = Value(

visibilitylib/src/main/scala/com/twitter/visibility/configapi/configs/VisibilityDeciders.scala

@@ -198,6 +198,7 @@ private[visibility] object VisibilityDeciders {
     TopicRecommendations -> DeciderKey.EnableTopicRecommendationsSafetyLevel,
     TrendsRepresentativeTweet -> DeciderKey.EnableTrendsRepresentativeTweetSafetyLevel,
     TrustedFriendsUserList -> DeciderKey.EnableTrustedFriendsUserListSafetyLevel,
+    TwitterDelegateUserList -> DeciderKey.EnableTwitterDelegateUserListSafetyLevel,
     TweetDetail -> DeciderKey.EnableTweetDetailSafetyLevel,
     TweetDetailNonToo -> DeciderKey.EnableTweetDetailNonTooSafetyLevel,
     TweetEngagers -> DeciderKey.EnableTweetEngagersSafetyLevel,
@@ -287,7 +288,7 @@ private[visibility] object VisibilityDeciders {
     RuleParams.EnableDropAllTrustedFriendsTweetsRuleParam -> DeciderKey.EnableDropAllTrustedFriendsTweetsRule,
     RuleParams.EnableDropTrustedFriendsTweetContentRuleParam -> DeciderKey.EnableDropTrustedFriendsTweetContentRule,
     RuleParams.EnableDropAllCollabInvitationTweetsRuleParam -> DeciderKey.EnableDropCollabInvitationTweetsRule,
-    RuleParams.EnableNsfwTextTopicsDropRuleParam -> DeciderKey.EnableNsfwTextTopicsDropRule,
+    RuleParams.EnableNsfwTextHighPrecisionDropRuleParam -> DeciderKey.EnableNsfwTextHighPrecisionDropRule,
     RuleParams.EnableLikelyIvsUserLabelDropRule -> DeciderKey.EnableLikelyIvsUserLabelDropRule,
     RuleParams.EnableCardUriRootDomainCardDenylistRule -> DeciderKey.EnableCardUriRootDomainDenylistRule,
     RuleParams.EnableCommunityNonMemberPollCardRule -> DeciderKey.EnableCommunityNonMemberPollCardRule,

visibilitylib/src/main/scala/com/twitter/visibility/configapi/params/RuleParams.scala

@@ -85,7 +85,7 @@ private[visibility] object RuleParams {
 
   object EnableDropAllCollabInvitationTweetsRuleParam extends RuleParam(false)
 
-  object EnableNsfwTextTopicsDropRuleParam extends RuleParam(false)
+  object EnableNsfwTextHighPrecisionDropRuleParam extends RuleParam(false)
 
   object EnableLikelyIvsUserLabelDropRule extends RuleParam(false)
 

visibilitylib/src/main/scala/com/twitter/visibility/configapi/params/SafetyLevelParams.scala

@@ -186,6 +186,7 @@ private[visibility] object SafetyLevelParams {
   object EnableTopicRecommendationsSafetyLevelParam extends SafetyLevelParam(false)
   object EnableTrendsRepresentativeTweetSafetyLevelParam extends SafetyLevelParam(false)
   object EnableTrustedFriendsUserListSafetyLevelParam extends SafetyLevelParam(false)
+  object EnableTwitterDelegateUserListSafetyLevelParam extends SafetyLevelParam(false)
   object EnableTweetDetailSafetyLevelParam extends SafetyLevelParam(false)
   object EnableTweetDetailNonTooSafetyLevelParam extends SafetyLevelParam(false)
   object EnableTweetDetailWithInjectionsHydrationSafetyLevelParam extends SafetyLevelParam(false)

visibilitylib/src/main/scala/com/twitter/visibility/engine/VisibilityRuleEngine.scala

@@ -143,7 +143,7 @@ class VisibilityRuleEngine private[VisibilityRuleEngine] (
               builder.withRuleResult(rule, RuleResult(builder.verdict, ShortCircuited))
             } else {
 
-              if (rule.fallbackActionBuilder.nonEmpty) {
+              if (failedFeatureDependencies.nonEmpty && rule.fallbackActionBuilder.nonEmpty) {
                 metricsRecorder.recordRuleFallbackAction(rule.name)
               }
 

visibilitylib/src/main/scala/com/twitter/visibility/models/SafetyLevel.scala

@@ -194,6 +194,7 @@ object SafetyLevel {
     ThriftSafetyLevel.TopicsLandingPageTopicRecommendations -> TopicsLandingPageTopicRecommendations,
     ThriftSafetyLevel.TrendsRepresentativeTweet -> TrendsRepresentativeTweet,
     ThriftSafetyLevel.TrustedFriendsUserList -> TrustedFriendsUserList,
+    ThriftSafetyLevel.TwitterDelegateUserList -> TwitterDelegateUserList,
     ThriftSafetyLevel.GryphonDecksAndColumns -> GryphonDecksAndColumns,
     ThriftSafetyLevel.TweetDetail -> TweetDetail,
     ThriftSafetyLevel.TweetDetailNonToo -> TweetDetailNonToo,
@@ -772,6 +773,9 @@ object SafetyLevel {
   case object TrustedFriendsUserList extends SafetyLevel {
     override val enabledParam: SafetyLevelParam = EnableTrustedFriendsUserListSafetyLevelParam
   }
+  case object TwitterDelegateUserList extends SafetyLevel {
+    override val enabledParam: SafetyLevelParam = EnableTwitterDelegateUserListSafetyLevelParam
+  }
   case object TweetDetail extends SafetyLevel {
     override val enabledParam: SafetyLevelParam = EnableTweetDetailSafetyLevelParam
   }

visibilitylib/src/main/scala/com/twitter/visibility/models/SafetyLevelGroup.scala

@@ -379,13 +379,6 @@ object SafetyLevelGroup {
     )
   }
 
-  case object ProfileMixer extends SafetyLevelGroup {
-    override val levels: Set[SafetyLevel] = Set(
-      ProfileMixerMedia,
-      ProfileMixerFavorites,
-    )
-  }
-
   case object Reactions extends SafetyLevelGroup {
     override val levels: Set[SafetyLevel] = Set(
       SignalsReactions,
@@ -516,6 +509,10 @@ object SafetyLevelGroup {
       SafetyLevel.TimelineProfile,
       TimelineProfileAll,
       TimelineProfileSpaces,
+      TimelineMedia,
+      ProfileMixerMedia,
+      TimelineFavorites,
+      ProfileMixerFavorites
     )
   }
 

visibilitylib/src/main/scala/com/twitter/visibility/models/SpaceSafetyLabelType.scala

@@ -36,8 +36,8 @@ object SpaceSafetyLabelType extends SafetyLabelType {
     s.SpaceSafetyLabelType.HatefulHighRecall -> HatefulHighRecall,
     s.SpaceSafetyLabelType.ViolenceHighRecall -> ViolenceHighRecall,
     s.SpaceSafetyLabelType.HighToxicityModelScore -> HighToxicityModelScore,
-    s.SpaceSafetyLabelType.UkraineCrisisTopic -> UkraineCrisisTopic,
+    s.SpaceSafetyLabelType.DeprecatedSpaceSafetyLabel14 -> Deprecated,
-    s.SpaceSafetyLabelType.DoNotPublicPublish -> DoNotPublicPublish,
+    s.SpaceSafetyLabelType.DeprecatedSpaceSafetyLabel15 -> Deprecated,
     s.SpaceSafetyLabelType.Reserved16 -> Deprecated,
     s.SpaceSafetyLabelType.Reserved17 -> Deprecated,
     s.SpaceSafetyLabelType.Reserved18 -> Deprecated,
@@ -69,10 +69,6 @@ object SpaceSafetyLabelType extends SafetyLabelType {
   case object ViolenceHighRecall extends SpaceSafetyLabelType
   case object HighToxicityModelScore extends SpaceSafetyLabelType
 
-  case object UkraineCrisisTopic extends SpaceSafetyLabelType
-
-  case object DoNotPublicPublish extends SpaceSafetyLabelType
-
   case object Deprecated extends SpaceSafetyLabelType
   case object Unknown extends SpaceSafetyLabelType
 

visibilitylib/src/main/scala/com/twitter/visibility/rules/FreedomOfSpeechNotReach.scala

@@ -3,6 +3,7 @@ package com.twitter.visibility.rules
 import com.twitter.spam.rtf.thriftscala.SafetyResultReason
 import com.twitter.util.Memoize
 import com.twitter.visibility.common.actions.AppealableReason
+import com.twitter.visibility.common.actions.AvoidReason.MightNotBeSuitableForAds
 import com.twitter.visibility.common.actions.LimitedEngagementReason
 import com.twitter.visibility.common.actions.SoftInterventionDisplayType
 import com.twitter.visibility.common.actions.SoftInterventionReason
@@ -440,36 +441,6 @@ object FreedomOfSpeechNotReachActions {
     }
   }
 
-  case class ConversationSectionAbusiveQualityAction(
-    violationLevel: ViolationLevel = DefaultViolationLevel)
-      extends FreedomOfSpeechNotReachActionBuilder[ConversationSectionAbusiveQuality.type] {
-
-    override def actionType: Class[_] = ConversationSectionAbusiveQuality.getClass
-
-    override val actionSeverity = 5
-    private def toRuleResult: Reason => RuleResult = Memoize { r =>
-      RuleResult(ConversationSectionAbusiveQuality, Evaluated)
-    }
-
-    def build(evaluationContext: EvaluationContext, featureMap: Map[Feature[_], _]): RuleResult = {
-      val appealableReason =
-        FreedomOfSpeechNotReach.extractTweetSafetyLabel(featureMap).map(_.labelType) match {
-          case Some(label) =>
-            FreedomOfSpeechNotReach.eligibleTweetSafetyLabelTypesToAppealableReason(
-              label,
-              violationLevel)
-          case _ =>
-            AppealableReason.Unspecified(violationLevel.level)
-        }
-
-      toRuleResult(Reason.fromAppealableReason(appealableReason))
-    }
-
-    override def withViolationLevel(violationLevel: ViolationLevel) = {
-      copy(violationLevel = violationLevel)
-    }
-  }
-
   case class SoftInterventionAvoidAction(violationLevel: ViolationLevel = DefaultViolationLevel)
       extends FreedomOfSpeechNotReachActionBuilder[TweetInterstitial] {
 
@@ -662,6 +633,9 @@ object FreedomOfSpeechNotReachRules {
 
     override def enabled: Seq[RuleParam[Boolean]] =
       Seq(EnableFosnrRuleParam, FosnrRulesEnabledParam)
+
+    override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+      new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
   }
 
   case class ViewerIsNonFollowerNonAuthorAndTweetHasViolationOfLevel(
@@ -678,6 +652,9 @@ object FreedomOfSpeechNotReachRules {
 
     override def enabled: Seq[RuleParam[Boolean]] =
       Seq(EnableFosnrRuleParam, FosnrRulesEnabledParam)
+
+    override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+      new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
   }
 
   case class ViewerIsNonAuthorAndTweetHasViolationOfLevel(
@@ -692,6 +669,9 @@ object FreedomOfSpeechNotReachRules {
 
     override def enabled: Seq[RuleParam[Boolean]] =
       Seq(EnableFosnrRuleParam, FosnrRulesEnabledParam)
+
+    override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+      new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
   }
 
   case object TweetHasViolationOfAnyLevelFallbackDropRule

visibilitylib/src/main/scala/com/twitter/visibility/rules/RuleBase.scala

@@ -188,6 +188,7 @@ object RuleBase {
     TopicRecommendations -> TopicRecommendationsPolicy,
     TrendsRepresentativeTweet -> TrendsRepresentativeTweetPolicy,
     TrustedFriendsUserList -> TrustedFriendsUserListPolicy,
+    TwitterDelegateUserList -> TwitterDelegateUserListPolicy,
     TweetDetail -> TweetDetailPolicy,
     TweetDetailNonToo -> TweetDetailNonTooPolicy,
     TweetDetailWithInjectionsHydration -> TweetDetailWithInjectionsHydrationPolicy,

visibilitylib/src/main/scala/com/twitter/visibility/rules/TweetLabelRules.scala

@@ -144,6 +144,9 @@ object NsfwCardImageAvoidAllUsersTweetLabelRule
       action = Avoid(Some(AvoidReason.ContainsNsfwMedia)),
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object NsfwCardImageAvoidAdPlacementAllUsersTweetLabelRule
@@ -247,6 +250,9 @@ object GoreAndViolenceHighPrecisionAvoidAllUsersTweetLabelRule
       TweetSafetyLabelType.GoreAndViolenceHighPrecision
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object GoreAndViolenceHighPrecisionAllUsersTweetLabelRule
@@ -266,6 +272,9 @@ object NsfwReportedHeuristicsAvoidAllUsersTweetLabelRule
       TweetSafetyLabelType.NsfwReportedHeuristics
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object NsfwReportedHeuristicsAvoidAdPlacementAllUsersTweetLabelRule
@@ -274,6 +283,9 @@ object NsfwReportedHeuristicsAvoidAdPlacementAllUsersTweetLabelRule
       TweetSafetyLabelType.NsfwReportedHeuristics
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object NsfwReportedHeuristicsAllUsersTweetLabelRule
@@ -294,6 +306,9 @@ object GoreAndViolenceReportedHeuristicsAvoidAllUsersTweetLabelRule
       TweetSafetyLabelType.GoreAndViolenceReportedHeuristics
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object GoreAndViolenceReportedHeuristicsAvoidAdPlacementAllUsersTweetLabelRule
@@ -302,6 +317,9 @@ object GoreAndViolenceReportedHeuristicsAvoidAdPlacementAllUsersTweetLabelRule
       TweetSafetyLabelType.GoreAndViolenceReportedHeuristics
     ) {
   override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableAvoidNsfwRulesParam)
+
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
 }
 
 object GoreAndViolenceHighPrecisionAllUsersTweetLabelDropRule
@@ -791,7 +809,7 @@ object SkipTweetDetailLimitedEngagementTweetLabelRule
 object DynamicProductAdDropTweetLabelRule
     extends TweetHasLabelRule(Drop(Unspecified), TweetSafetyLabelType.DynamicProductAd)
 
-object NsfwTextTweetLabelTopicsDropRule
+object NsfwTextHighPrecisionTweetLabelDropRule
     extends RuleWithConstantAction(
       Drop(Reason.Nsfw),
       And(
@@ -803,7 +821,7 @@ object NsfwTextTweetLabelTopicsDropRule
       )
     )
     with DoesLogVerdict {
-  override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableNsfwTextTopicsDropRuleParam)
+  override def enabled: Seq[RuleParam[Boolean]] = Seq(EnableNsfwTextHighPrecisionDropRuleParam)
   override def actionSourceBuilder: Option[RuleActionSourceBuilder] = Some(
     TweetSafetyLabelSourceBuilder(TweetSafetyLabelType.NsfwTextHighPrecision))
 }
@@ -832,7 +850,10 @@ object DoNotAmplifyTweetLabelAvoidRule
     extends TweetHasLabelRule(
       Avoid(),
       TweetSafetyLabelType.DoNotAmplify
-    )
+    ) {
+  override val fallbackActionBuilder: Option[ActionBuilder[_ <: Action]] = Some(
+    new ConstantActionBuilder(Avoid(Some(MightNotBeSuitableForAds))))
+}
 
 object NsfaHighPrecisionTweetLabelAvoidRule
     extends TweetHasLabelRule(

visibilitylib/src/main/scala/com/twitter/visibility/rules/VisibilityPolicy.scala

@@ -776,7 +776,10 @@ case object MagicRecsPolicy
       tweetRules = MagicRecsPolicyOverrides.union(
         RecommendationsPolicy.tweetRules.filterNot(_ == SafetyCrisisLevel3DropRule),
         NotificationsIbisPolicy.tweetRules,
-        Seq(NsfaHighRecallTweetLabelRule, NsfwHighRecallTweetLabelRule),
+        Seq(
+          NsfaHighRecallTweetLabelRule,
+          NsfwHighRecallTweetLabelRule,
+          NsfwTextHighPrecisionTweetLabelDropRule),
         Seq(
           AuthorBlocksViewerDropRule,
           ViewerBlocksAuthorRule,
@@ -1171,7 +1174,7 @@ case object ReturningUserExperiencePolicy
         NsfwHighRecallTweetLabelRule,
         NsfwVideoTweetLabelDropRule,
         NsfwTextTweetLabelDropRule,
-        NsfwTextTweetLabelTopicsDropRule,
+        NsfwTextHighPrecisionTweetLabelDropRule,
         SpamHighRecallTweetLabelDropRule,
         DuplicateContentTweetLabelDropRule,
         GoreAndViolenceTweetLabelRule,
@@ -1785,6 +1788,14 @@ case object TimelineListsPolicy
             NsfwReportedHeuristicsAllUsersTweetLabelRule,
             GoreAndViolenceReportedHeuristicsAllUsersTweetLabelRule,
             NsfwCardImageAllUsersTweetLabelRule,
+            NsfwHighPrecisionTweetLabelAvoidRule,
+            NsfwHighRecallTweetLabelAvoidRule,
+            GoreAndViolenceHighPrecisionAvoidAllUsersTweetLabelRule,
+            NsfwReportedHeuristicsAvoidAllUsersTweetLabelRule,
+            GoreAndViolenceReportedHeuristicsAvoidAllUsersTweetLabelRule,
+            NsfwCardImageAvoidAllUsersTweetLabelRule,
+            DoNotAmplifyTweetLabelAvoidRule,
+            NsfaHighPrecisionTweetLabelAvoidRule,
           ) ++ LimitedEngagementBaseRules.tweetRules
     )
 
@@ -2132,7 +2143,13 @@ case object TimelineHomePolicy
       userRules = Seq(
         ViewerMutesAuthorRule,
         ViewerBlocksAuthorRule,
-        DeciderableAuthorBlocksViewerDropRule
+        DeciderableAuthorBlocksViewerDropRule,
+        ProtectedAuthorDropRule,
+        SuspendedAuthorRule,
+        DeactivatedAuthorRule,
+        ErasedAuthorRule,
+        OffboardedAuthorRule,
+        DropTakendownUserRule
       ),
       policyRuleParams = SensitiveMediaSettingsTimelineHomeBaseRules.policyRuleParams
     )
@@ -2171,7 +2188,13 @@ case object BaseTimelineHomePolicy
       userRules = Seq(
         ViewerMutesAuthorRule,
         ViewerBlocksAuthorRule,
-        DeciderableAuthorBlocksViewerDropRule
+        DeciderableAuthorBlocksViewerDropRule,
+        ProtectedAuthorDropRule,
+        SuspendedAuthorRule,
+        DeactivatedAuthorRule,
+        ErasedAuthorRule,
+        OffboardedAuthorRule,
+        DropTakendownUserRule
       )
     )
 
@@ -2255,7 +2278,13 @@ case object TimelineHomeLatestPolicy
       userRules = Seq(
         ViewerMutesAuthorRule,
         ViewerBlocksAuthorRule,
-        DeciderableAuthorBlocksViewerDropRule
+        DeciderableAuthorBlocksViewerDropRule,
+        ProtectedAuthorDropRule,
+        SuspendedAuthorRule,
+        DeactivatedAuthorRule,
+        ErasedAuthorRule,
+        OffboardedAuthorRule,
+        DropTakendownUserRule
       ),
       policyRuleParams = SensitiveMediaSettingsTimelineHomeBaseRules.policyRuleParams
     )
@@ -3283,7 +3312,7 @@ case object TopicRecommendationsPolicy
       tweetRules =
         Seq(
           NsfwHighRecallTweetLabelRule,
-          NsfwTextTweetLabelTopicsDropRule
+          NsfwTextHighPrecisionTweetLabelDropRule
         )
           ++ RecommendationsPolicy.tweetRules,
       userRules = RecommendationsPolicy.userRules
@@ -3536,6 +3565,17 @@ case object TrustedFriendsUserListPolicy
       )
     )
 
+case object TwitterDelegateUserListPolicy
+    extends VisibilityPolicy(
+      userRules = Seq(
+        ViewerBlocksAuthorRule,
+        ViewerIsAuthorDropRule,
+        DeactivatedAuthorRule,
+        AuthorBlocksViewerDropRule
+      ),
+      tweetRules = Seq(DropAllRule)
+    )
+
 case object QuickPromoteTweetEligibilityPolicy
     extends VisibilityPolicy(
       tweetRules = TweetDetailPolicy.tweetRules,

visibilitylib/src/main/scala/com/twitter/visibility/rules/generators/TweetRuleGenerator.scala

@@ -100,30 +100,6 @@ object TweetRuleGenerator {
           FreedomOfSpeechNotReachActions.SoftInterventionAvoidLimitedEngagementsAction(
             limitedActionStrings = Some(level3LimitedActions))
         )
-        .addSafetyLevelRule(
-          SafetyLevel.TimelineMedia,
-          FreedomOfSpeechNotReachActions
-            .SoftInterventionAvoidLimitedEngagementsAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.ProfileMixerMedia,
-          FreedomOfSpeechNotReachActions
-            .SoftInterventionAvoidLimitedEngagementsAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.TimelineFavorites,
-          FreedomOfSpeechNotReachActions
-            .SoftInterventionAvoidLimitedEngagementsAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.ProfileMixerFavorites,
-          FreedomOfSpeechNotReachActions
-            .SoftInterventionAvoidLimitedEngagementsAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
         .build,
       UserType.Author -> TweetVisibilityPolicy
         .builder()
@@ -159,30 +135,6 @@ object TweetRuleGenerator {
             .InterstitialLimitedEngagementsAvoidAction(limitedActionStrings =
               Some(level3LimitedActions))
         )
-        .addSafetyLevelRule(
-          SafetyLevel.TimelineMedia,
-          FreedomOfSpeechNotReachActions
-            .InterstitialLimitedEngagementsAvoidAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.ProfileMixerMedia,
-          FreedomOfSpeechNotReachActions
-            .InterstitialLimitedEngagementsAvoidAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.TimelineFavorites,
-          FreedomOfSpeechNotReachActions
-            .InterstitialLimitedEngagementsAvoidAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
-        .addSafetyLevelRule(
-          SafetyLevel.ProfileMixerFavorites,
-          FreedomOfSpeechNotReachActions
-            .InterstitialLimitedEngagementsAvoidAction(limitedActionStrings =
-              Some(level3LimitedActions))
-        )
         .build,
     ),
   )