Merge cbbf9e0a01 into 72eda9a24f

cr-mixer/README.md

@@ -1,6 +1,6 @@
 # CR-Mixer
 
-CR-Mixer is a candidate generation service proposed as part of the Personalization Strategy vision for Twitter. Its aim is to speed up the iteration and development of candidate generation and light ranking. The service acts as a lightweight coordinating layer that delegates candidate generation tasks to underlying compute services. It focuses on Twitter's candidate generation use cases and offers a centralized platform for fetching, mixing, and managing candidate sources and light rankers. The overarching goal is to increase the speed and ease of testing and developing candidate generation pipelines, ultimately delivering more value to Twitter users.
+CR-Mixer is a candidate generation service proposed as part of the Personalization Strategy vision for Twitter. It aims to speed up the iteration and development of candidate generation and light ranking. The service acts as a lightweight coordinating layer that delegates candidate generation tasks to underlying compute services. It focuses on Twitter's candidate generation use cases and offers a centralized platform for fetching, mixing, and managing candidate sources and light rankers. The overarching goal is to increase the speed and ease of testing and developing candidate generation pipelines, ultimately delivering more value to Twitter users.
 
 CR-Mixer acts as a configurator and delegator, providing abstractions for the challenging parts of candidate generation and handling performance issues. It will offer a 1-stop-shop for fetching and mixing candidate sources, a managed and shared performant platform, a light ranking layer, a common filtering layer, a version control system, a co-owned feature switch set, and peripheral tooling.
 

cr-mixer/server/src/main/resources/config/decider.yml

@@ -2,11 +2,11 @@
 # https://sourcegraph.twitter.biz/git.twitter.biz/source/-/blob/cr-mixer/server/src/main/scala/com/twitter/cr_mixer/param/decider/DeciderKey.scala
 
 dark_traffic_filter:
-  comment: Proportion of the requests that are forwarded as dark traffic to the proxy
+  comment: "Proportion of the requests that are forwarded as dark traffic to the proxy"
   default_availability: 0
 
 enable_tweet_recommendations_home_product:
-  comment: Proportion of requests where we return an actual response for TweetRecommendations Home product
+  comment: "Proportion of requests where we return an actual response for TweetRecommendations Home product"
   default_availability: 10000
 
 enable_tweet_health_score:

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/AdsBlender.scala

@@ -26,18 +26,17 @@ case class AdsBlender @Inject() (globalStats: StatsReceiver) {
   def blend(
     inputCandidates: Seq[Seq[InitialAdsCandidate]],
   ): Future[Seq[BlendedAdsCandidate]] = {
-
-    // Filter out empty candidate sequence
+    // Filter out empty candidate sequence.
     val candidates = inputCandidates.filter(_.nonEmpty)
     val (interestedInCandidates, twistlyCandidates) =
       candidates.partition(_.head.candidateGenerationInfo.sourceInfoOpt.isEmpty)
-    // First interleave twistly candidates
+    // Interleave twistly candidates.
     val interleavedTwistlyCandidates = InterleaveUtil.interleave(twistlyCandidates)
 
     val twistlyAndInterestedInCandidates =
       Seq(interestedInCandidates.flatten, interleavedTwistlyCandidates)
 
-    // then interleave  twistly candidates with interested in to make them even
+    // Interleave twistly candidates with interested in to make them even.
     val interleavedCandidates = InterleaveUtil.interleave(twistlyAndInterestedInCandidates)
 
     stats.stat("candidates").add(interleavedCandidates.size)
@@ -45,6 +44,7 @@ case class AdsBlender @Inject() (globalStats: StatsReceiver) {
     val blendedCandidates = buildBlendedAdsCandidate(inputCandidates, interleavedCandidates)
     Future.value(blendedCandidates)
   }
+
   private def buildBlendedAdsCandidate(
     inputCandidates: Seq[Seq[InitialAdsCandidate]],
     interleavedCandidates: Seq[InitialAdsCandidate]
@@ -73,5 +73,4 @@ case class AdsBlender @Inject() (globalStats: StatsReceiver) {
     }
     tweetIdMap.toMap
   }
-
 }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/BlendedCandidatesBuilder.scala

@@ -9,7 +9,7 @@ import scala.collection.mutable
 object BlendedCandidatesBuilder {
 
   /**
-   * @param inputCandidates input candidate prior to interleaving
+   * @param inputCandidates input candidate prior to interleaving.
    * @param interleavedCandidates after interleaving. These tweets are de-duplicated.
    */
   def build(
@@ -23,8 +23,8 @@ object BlendedCandidatesBuilder {
   }
 
   /**
+   * This function tells you which CandidateGenerationInfo generated a given tweet.
    * The same tweet can be generated by different sources.
-   * This function tells you which CandidateGenerationInfo generated a given tweet
    */
   private def buildCandidateToCGInfosMap(
     candidateSeq: Seq[Seq[InitialCandidate]],
@@ -44,5 +44,4 @@ object BlendedCandidatesBuilder {
     }
     tweetIdMap.toMap
   }
-
 }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/ContentSignalBlender.scala

@@ -17,7 +17,7 @@ case class ContentSignalBlender @Inject() (globalStats: StatsReceiver) {
   private val stats: StatsReceiver = globalStats.scope(name)
 
   /**
-   *  Exposes multiple types of sorting relying only on Content Based signals
+   *  Exposes multiple types of sorting relying only on Content Based signals.
    *  Candidate Recency, Random, FavoriteCount and finally Standardized, which standardizes the scores
    *  that come from the active SimilarityEngine and then sort on the standardized scores.
    */
@@ -25,7 +25,7 @@ case class ContentSignalBlender @Inject() (globalStats: StatsReceiver) {
     params: Params,
     inputCandidates: Seq[Seq[InitialCandidate]],
   ): Future[Seq[BlendedCandidate]] = {
-    // Filter out empty candidate sequence
+    // Filter out empty candidate sequence.
     val candidates = inputCandidates.filter(_.nonEmpty)
     val sortedCandidates = params(BlenderParams.ContentBlenderTypeSortingAlgorithmParam) match {
       case BlenderParams.ContentBasedSortingAlgorithmEnum.CandidateRecency =>

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/CountWeightedInterleaveBlender.scala

@@ -70,9 +70,9 @@ object CountWeightedInterleaveBlender {
    * We pass two parameters to the weighted interleaver:
    * @param rankerWeightShrinkage shrinkage parameter between [0, 1] that determines how close we
    *                              stay to uniform sampling. The bigger the shrinkage the
-   *                              closer we are to uniform round robin
+   *                              closer we are to uniform round robin.
    * @param maxWeightAdjustments max number of weighted sampling to do prior to defaulting to
-   *                             uniform. Set so that we avoid infinite loops (e.g. if weights are
+   *                             uniform. Set so that we avoid infinite loops. (e.g. if weights are
    *                             0)
    */
   case class WeightedBlenderQuery(

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/SourceTypeBackFillBlender.scala

@@ -18,22 +18,22 @@ case class SourceTypeBackFillBlender @Inject() (globalStats: StatsReceiver) {
   private val stats: StatsReceiver = globalStats.scope(name)
 
   /**
-   *  Partition the candidates based on source type
+   *  Partition the candidates based on source type.
    *  Interleave the two partitions of candidates separately
-   *  Then append the back fill candidates to the end
+   *  and then append the back fill candidates to the end.
    */
   def blend(
     params: Params,
     inputCandidates: Seq[Seq[InitialCandidate]],
   ): Future[Seq[BlendedCandidate]] = {
 
-    // Filter out empty candidate sequence
+    // Filter out empty candidate sequence.
     val candidates = inputCandidates.filter(_.nonEmpty)
 
     val backFillSourceTypes =
       if (params(BlenderParams.SourceTypeBackFillEnableVideoBackFill)) BackFillSourceTypesWithVideo
       else BackFillSourceTypes
-    // partition candidates based on their source types
+    // Partition candidates based on their source types.
     val (backFillCandidates, regularCandidates) =
       candidates.partition(
         _.head.candidateGenerationInfo.sourceInfoOpt
@@ -43,7 +43,7 @@ case class SourceTypeBackFillBlender @Inject() (globalStats: StatsReceiver) {
     val interleavedBackFillCandidates =
       InterleaveUtil.interleave(backFillCandidates)
     stats.stat("backFillCandidates").add(interleavedBackFillCandidates.size)
-    // Append interleaved backfill candidates to the end
+    // Append interleaved backfill candidates to the end.
     val interleavedCandidates = interleavedRegularCandidates ++ interleavedBackFillCandidates
 
     stats.stat("candidates").add(interleavedCandidates.size)
@@ -51,7 +51,6 @@ case class SourceTypeBackFillBlender @Inject() (globalStats: StatsReceiver) {
     val blendedCandidates = BlendedCandidatesBuilder.build(inputCandidates, interleavedCandidates)
     Future.value(blendedCandidates)
   }
-
 }
 
 object ImplicitSignalBackFillBlender {

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/blender/SwitchBlender.scala

@@ -27,7 +27,7 @@ case class SwitchBlender @Inject() (
     userState: UserState,
     inputCandidates: Seq[Seq[InitialCandidate]],
   ): Future[Seq[BlendedCandidate]] = {
-    // Take out empty seq
+    // Take out the empty seq.
     val nonEmptyCandidates = inputCandidates.collect {
       case candidates if candidates.nonEmpty =>
         candidates
@@ -43,7 +43,7 @@ case class SwitchBlender @Inject() (
     }
 
     val candidatesToBlend = nonEmptyCandidates.sortBy(_.head)(innerSignalSorting)
-    // Blend based on specified blender rules
+    // Blend based on specified blender rules.
     params(BlenderParams.BlendingAlgorithmParam) match {
       case BlendingAlgorithmEnum.RoundRobin =>
         defaultBlender.blend(candidatesToBlend)

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/AdsCandidateGenerator.scala

@@ -39,24 +39,25 @@ class AdsCandidateGenerator @Inject() (
   def get(query: AdsCandidateGeneratorQuery): Future[Seq[RankedAdsCandidate]] = {
     val allStats = stats.scope("all")
     val perProductStats = stats.scope("perProduct", query.product.toString)
-
     StatsUtil.trackItemsStats(allStats) {
       StatsUtil.trackItemsStats(perProductStats) {
         for {
-          // fetch source signals
+          // Fetch source signals.
           sourceSignals <- StatsUtil.trackBlockStats(fetchSourcesStats) {
             fetchSources(query)
           }
+
           realGraphSeeds <- StatsUtil.trackItemMapStats(fetchRealGraphSeedsStats) {
             fetchSeeds(query)
           }
-          // get initial candidates from similarity engines
-          // hydrate lineItemInfo and filter out non active ads
+
+          // Get initial candidates from similarity engines.
+          // Hydrate lineItemInfo and filter out non active ads.
           initialCandidates <- StatsUtil.trackBlockStats(fetchCandidatesStats) {
             fetchCandidates(query, sourceSignals, realGraphSeeds)
           }
 
-          // blend candidates
+          // Blend candidates.
           blendedCandidates <- StatsUtil.trackItemsStats(interleaveStats) {
             interleave(initialCandidates)
           }
@@ -73,7 +74,6 @@ class AdsCandidateGenerator @Inject() (
         }
       }
     }
-
   }
 
   def fetchSources(
@@ -95,7 +95,6 @@ class AdsCandidateGenerator @Inject() (
         .fetchCandidates(query.userId, sourceSignals, realGraphSeeds, query.params),
       query.params(AdsParams.EnableScribe)
     )
-
   }
 
   private def fetchSeeds(
@@ -121,7 +120,6 @@ class AdsCandidateGenerator @Inject() (
     scoreBoostFactor: Double,
     statsReceiver: StatsReceiver,
   ): Future[Seq[RankedAdsCandidate]] = {
-
     val candidateSize = candidates.size
     val rankedCandidates = candidates.zipWithIndex.map {
       case (candidate, index) =>

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/AdsCandidateSourcesRouter.scala

@@ -90,7 +90,6 @@ case class AdsCandidateSourcesRouter @Inject() (
     realGraphSeeds: Map[UserId, Double],
     params: configapi.Params
   ): Future[Seq[Seq[InitialAdsCandidate]]] = {
-
     val simClustersANN1ConfigId = params(SimClustersANNParams.SimClustersANN1ConfigId)
 
     val tweetBasedSANNMinScore = params(
@@ -296,7 +295,7 @@ case class AdsCandidateSourcesRouter @Inject() (
       params
     )
 
-    // dark traffic to simclusters-ann-2
+    // Dark traffic to simclusters-ann-2
     if (decider.isAvailable(DeciderConstants.enableSimClustersANN2DarkTrafficDeciderKey)) {
       val simClustersANN2ConfigId = params(SimClustersANNParams.SimClustersANN2ConfigId)
       val sann2Query = SimClustersANNSimilarityEngine.fromParams(
@@ -329,7 +328,6 @@ case class AdsCandidateSourcesRouter @Inject() (
     sourceInfo: Option[SourceInfo],
     params: configapi.Params
   ) = {
-
     val query = ProducerBasedUserAdGraphSimilarityEngine.fromParams(
       sourceInfo.get.internalId,
       params
@@ -352,7 +350,6 @@ case class AdsCandidateSourcesRouter @Inject() (
     sourceInfo: Option[SourceInfo],
     params: configapi.Params
   ) = {
-
     val query = TweetBasedUserAdGraphSimilarityEngine.fromParams(
       sourceInfo.get.internalId,
       params
@@ -375,7 +372,6 @@ case class AdsCandidateSourcesRouter @Inject() (
     realGraphSeeds: Map[UserId, Double],
     params: configapi.Params
   ) = {
-
     val query = ConsumersBasedUserAdGraphSimilarityEngine
       .fromParams(realGraphSeeds, params)
 
@@ -394,7 +390,7 @@ case class AdsCandidateSourcesRouter @Inject() (
           CandidateGenerationInfo(
             Some(sourceInfo),
             similarityEngineInfo,
-            Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs
+            Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs.
           )
         )
       })
@@ -404,7 +400,7 @@ case class AdsCandidateSourcesRouter @Inject() (
     similarityEngine: HnswANNSimilarityEngine,
     similarityEngineType: SimilarityEngineType,
     requestUserId: UserId,
-    sourceInfo: Option[SourceInfo], // if none, then it's consumer-based similarity engine
+    sourceInfo: Option[SourceInfo], // If none, then it's consumer-based similarity engine.
     model: String
   ): Future[Seq[TweetWithCandidateGenerationInfo]] = {
     val internalId =
@@ -455,7 +451,7 @@ case class AdsCandidateSourcesRouter @Inject() (
               CandidateGenerationInfo(
                 None,
                 similarityEngineInfo,
-                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs
+                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs.
               )
             )
           }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/CandidateSourcesRouter.scala

@@ -96,7 +96,6 @@ case class CandidateSourcesRouter @Inject() (
     sourceGraphs: Map[String, Option[GraphSourceInfo]],
     params: configapi.Params,
   ): Future[Seq[Seq[InitialCandidate]]] = {
-
     val tweetBasedCandidatesFuture = getCandidates(
       getTweetBasedSourceInfo(sourceSignals),
       params,
@@ -225,7 +224,7 @@ case class CandidateSourcesRouter @Inject() (
           consumersBasedUvgRealGraphInCandidatesFuture,
           customizedRetrievalBasedCandidatesFuture
         )).map { candidatesList =>
-        // remove empty innerSeq
+        // Remove empty innerSeq.
         val result = candidatesList.flatten.filter(_.nonEmpty)
         stats.stat("numOfSequences").add(result.size)
         stats.stat("flattenCandidatesWithDup").add(result.flatten.size)
@@ -262,7 +261,7 @@ case class CandidateSourcesRouter @Inject() (
               CandidateGenerationInfo(
                 sourceInfo,
                 similarityEngineInfo,
-                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs
+                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs.
               )
             )
           }
@@ -330,7 +329,7 @@ case class CandidateSourcesRouter @Inject() (
               CandidateGenerationInfo(
                 None,
                 similarityEngineInfo,
-                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs
+                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs.
               )
             )
           }
@@ -358,7 +357,7 @@ case class CandidateSourcesRouter @Inject() (
       engine.getCandidates(EngineQuery(query, params)).map {
         _.map {
           _.map { tweetWithScore =>
-            // define filters
+            // Define filters.
             TweetWithCandidateGenerationInfo(
               tweetWithScore.tweetId,
               CandidateGenerationInfo(
@@ -401,7 +400,7 @@ case class CandidateSourcesRouter @Inject() (
               CandidateGenerationInfo(
                 None,
                 similarityEngineInfo,
-                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs
+                Seq.empty // Atomic Similarity Engine. Hence it has no contributing SEs.
               )
             )
           }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/CrCandidateGenerator.scala

@@ -48,7 +48,6 @@ class CrCandidateGenerator @Inject() (
   timeoutConfig: TimeoutConfig,
   globalStats: StatsReceiver) {
   private val timer: Timer = new JavaTimer(true)
-
   private val stats: StatsReceiver = globalStats.scope(this.getClass.getCanonicalName)
 
   private val fetchSourcesStats = stats.scope("fetchSources")
@@ -78,14 +77,14 @@ class CrCandidateGenerator @Inject() (
               fetchSources(query)
             }
             initialCandidates <- StatsUtil.trackBlockStats(fetchCandidatesAfterFilterStats) {
-              // find the positive and negative signals
+              // Find the positive and negative signals.
               val (positiveSignals, negativeSignals) = sourceSignals.partition { signal =>
                 !EnabledNegativeSourceTypes.contains(signal.sourceType)
               }
               fetchPositiveSourcesStats.stat("size").add(positiveSignals.size)
               fetchNegativeSourcesStats.stat("size").add(negativeSignals.size)
 
-              // find the positive signals to keep, removing block and muted users
+              // Find the positive signals to keep, removing block and muted users.
               val filteredSourceInfo =
                 if (negativeSignals.nonEmpty && query.params(
                     RecentNegativeSignalParams.EnableSourceParam)) {
@@ -94,7 +93,7 @@ class CrCandidateGenerator @Inject() (
                   positiveSignals
                 }
 
-              // fetch candidates from the positive signals
+              // Fetch candidates from the positive signals.
               StatsUtil.trackBlockStats(fetchCandidatesStats) {
                 fetchCandidates(query, filteredSourceInfo, sourceGraphsMap)
               }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/CustomizedRetrievalCandidateGeneration.scala

@@ -28,7 +28,7 @@ import javax.inject.Singleton
 import scala.collection.mutable.ArrayBuffer
 
 /**
- * A candidate generator that fetches similar tweets from multiple customized retrieval based candidate sources
+ * A candidate generator that fetches similar tweets from multiple customized retrieval based candidate sources.
  *
  * Different from [[TweetBasedCandidateGeneration]], this store returns candidates from different
  * similarity engines without blending. In other words, this class shall not be thought of as a

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/FrsTweetCandidateGenerator.scala

@@ -105,7 +105,7 @@ class FrsTweetCandidateGenerator @Inject() (
   }
 
   /**
-   * Fetch recommended seed users from FRS
+   * Fetch recommended seed users from FRS.
    */
   private def fetchSeeds(
     userId: UserId,
@@ -131,7 +131,7 @@ class FrsTweetCandidateGenerator @Inject() (
   }
 
   /**
-   * Fetch tweet candidates from Earlybird
+   * Fetch tweet candidates from Earlybird.
    */
   private def fetchCandidates(
     searcherUserId: UserId,
@@ -141,7 +141,7 @@ class FrsTweetCandidateGenerator @Inject() (
     params: Params
   ): Future[Option[Seq[TweetWithAuthor]]] = {
     if (seedAuthors.nonEmpty) {
-      // call earlybird
+      // Call Earlybird.
       val query = EarlybirdSimilarityEngineRouter.queryFromParams(
         Some(searcherUserId),
         seedAuthors,
@@ -154,7 +154,7 @@ class FrsTweetCandidateGenerator @Inject() (
   }
 
   /**
-   * Filter candidates that do not pass visibility filter policy
+   * Filter candidates that do not pass visibility filter policy.
    */
   private def filterCandidates(
     candidates: Option[Seq[TweetWithAuthor]],
@@ -175,7 +175,7 @@ class FrsTweetCandidateGenerator @Inject() (
   }
 
   /**
-   * Hydrate the candidates with the FRS candidate sources and scores
+   * Hydrate the candidates with the FRS candidate sources and scores.
    */
   private def hydrateCandidates(
     frsAuthorWithScores: Option[Map[UserId, FrsQueryResult]],
@@ -193,8 +193,8 @@ class FrsTweetCandidateGenerator @Inject() (
             frsCandidateSourceScores = frsQueryResult.flatMap { result =>
               result.sourceWithScores.map {
                 _.collect {
-                  // see TokenStrToAlgorithmMap @ https://sourcegraph.twitter.biz/git.twitter.biz/source/-/blob/hermit/hermit-core/src/main/scala/com/twitter/hermit/constants/AlgorithmFeedbackTokens.scala
-                  // see Algorithm @ https://sourcegraph.twitter.biz/git.twitter.biz/source/-/blob/hermit/hermit-core/src/main/scala/com/twitter/hermit/model/Algorithm.scala
+                  // See TokenStrToAlgorithmMap @ https://sourcegraph.twitter.biz/git.twitter.biz/source/-/blob/hermit/hermit-core/src/main/scala/com/twitter/hermit/constants/AlgorithmFeedbackTokens.scala
+                  // See Algorithm @ https://sourcegraph.twitter.biz/git.twitter.biz/source/-/blob/hermit/hermit-core/src/main/scala/com/twitter/hermit/model/Algorithm.scala
                   case (candidateSourceAlgoStr, score)
                       if AlgorithmFeedbackTokens.TokenStrToAlgorithmMap.contains(
                         candidateSourceAlgoStr) =>
@@ -210,7 +210,6 @@ class FrsTweetCandidateGenerator @Inject() (
       }
     }
   }
-
 }
 
 object FrsTweetCandidateGenerator {

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/RelatedTweetCandidateGenerator.scala

@@ -43,7 +43,6 @@ class RelatedTweetCandidateGenerator @Inject() (
   def get(
     query: RelatedTweetCandidateGeneratorQuery
   ): Future[Seq[InitialCandidate]] = {
-
     val allStats = stats.scope("all")
     val perProductStats = stats.scope("perProduct", query.product.toString)
     StatsUtil.trackItemsStats(allStats) {
@@ -90,9 +89,9 @@ class RelatedTweetCandidateGenerator @Inject() (
   }
 
   /***
-   * fetch Candidates from TweetBased/ProducerBased Unified Similarity Engine,
-   * and apply VF filter based on TweetInfoStore
-   * To align with the downstream processing (filter, rank), we tend to return a Seq[Seq[InitialCandidate]]
+   * Fetch Candidates from TweetBased/ProducerBased Unified Similarity Engine,
+   * and apply VF filter based on TweetInfoStore.
+   * To align with the downstream processing (filter, rank). We tend to return a Seq[Seq[InitialCandidate]]
    * instead of a Seq[Candidate] even though we only have a Seq in it.
    */
   private def getCandidatesFromSimilarityEngine[QueryType](
@@ -103,7 +102,7 @@ class RelatedTweetCandidateGenerator @Inject() (
 
     /***
      * We wrap the query to be a Seq of queries for the Sim Engine to ensure evolvability of candidate generation
-     * and as a result, it will return Seq[Seq[InitialCandidate]]
+     * and as a result, it will return Seq[Seq[InitialCandidate]].
      */
     val engineQueries =
       Seq(fromParamsForRelatedTweet(query.internalId, query.params))
@@ -138,7 +137,7 @@ class RelatedTweetCandidateGenerator @Inject() (
     Future.collect(tweetInfoStore.multiGet(tweetIds)).map { tweetInfos =>
       /***
        * If tweetInfo does not exist, we will filter out this tweet candidate.
-       * This tweetInfo filter also acts as the VF filter
+       * This tweetInfo filter also acts as the VF filter.
        */
       candidates.collect {
         case candidate if tweetInfos.getOrElse(candidate.tweetId, None).isDefined =>

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/RelatedVideoTweetCandidateGenerator.scala

@@ -36,7 +36,6 @@ class RelatedVideoTweetCandidateGenerator @Inject() (
   def get(
     query: RelatedVideoTweetCandidateGeneratorQuery
   ): Future[Seq[InitialCandidate]] = {
-
     val allStats = stats.scope("all")
     val perProductStats = stats.scope("perProduct", query.product.toString)
     StatsUtil.trackItemsStats(allStats) {
@@ -75,8 +74,8 @@ class RelatedVideoTweetCandidateGenerator @Inject() (
   }
 
   /***
-   * fetch Candidates from TweetBased/ProducerBased Unified Similarity Engine,
-   * and apply VF filter based on TweetInfoStore
+   * Fetch Candidates from TweetBased/ProducerBased Unified Similarity Engine,
+   * and apply VF filter based on TweetInfoStore.
    * To align with the downstream processing (filter, rank), we tend to return a Seq[Seq[InitialCandidate]]
    * instead of a Seq[Candidate] even though we only have a Seq in it.
    */
@@ -88,7 +87,7 @@ class RelatedVideoTweetCandidateGenerator @Inject() (
 
     /***
      * We wrap the query to be a Seq of queries for the Sim Engine to ensure evolvability of candidate generation
-     * and as a result, it will return Seq[Seq[InitialCandidate]]
+     * and as a result, it will return Seq[Seq[InitialCandidate]].
      */
     val engineQueries =
       Seq(fromParamsForRelatedVideoTweet(query.internalId, query.params))
@@ -121,7 +120,7 @@ class RelatedVideoTweetCandidateGenerator @Inject() (
     Future.collect(tweetInfoStore.multiGet(tweetIds)).map { tweetInfos =>
       /***
        * If tweetInfo does not exist, we will filter out this tweet candidate.
-       * This tweetInfo filter also acts as the VF filter
+       * This tweetInfo filter also acts as the VF filter.
        */
       candidates.collect {
         case candidate if tweetInfos.getOrElse(candidate.tweetId, None).isDefined =>

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/SimClustersInterestedInCandidateGeneration.scala

@@ -179,7 +179,7 @@ case class SimClustersInterestedInCandidateGeneration @Inject() (
             else
               Future.None
 
-          // AddressBookInterestedIn Queries
+          // AddressBookInterestedIn Queries.
           val userAddressBookInterestedInCandidateResultFut =
             if (query.enableAddressBookNextInterestedIn && query.enableProdSimClustersANNSimilarityEngine)
               getInterestedInCandidateResult(
@@ -397,7 +397,7 @@ object SimClustersInterestedInCandidateGeneration {
     internalId: InternalId,
     params: configapi.Params,
   ): Query = {
-    // SimClusters common configs
+    // SimClusters common configs.
     val simClustersModelVersion =
       ModelVersions.Enum.enumToSimClustersModelVersionMap(params(GlobalParams.ModelVersionParam))
     val simClustersANNConfigId = params(SimClustersANNParams.SimClustersANNConfigId)
@@ -415,13 +415,13 @@ object SimClustersInterestedInCandidateGeneration {
     val simClustersAddressBookInterestedInMinScore = params(
       InterestedInParams.MinScoreAddressBookParam)
 
-    // InterestedIn embeddings parameters
+    // InterestedIn embeddings parameters.
     val interestedInEmbedding = params(InterestedInParams.InterestedInEmbeddingIdParam)
     val nextInterestedInEmbedding = params(InterestedInParams.NextInterestedInEmbeddingIdParam)
     val addressbookInterestedInEmbedding = params(
       InterestedInParams.AddressBookInterestedInEmbeddingIdParam)
 
-    // Prod SimClustersANN Query
+    // Prod SimClustersANN Query.
     val interestedInSimClustersANNQuery =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -446,7 +446,7 @@ object SimClustersInterestedInCandidateGeneration {
         simClustersANNConfigId,
         params)
 
-    // Experimental SANN cluster Query
+    // Experimental SANN cluster Query.
     val interestedInExperimentalSimClustersANNQuery =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -471,7 +471,7 @@ object SimClustersInterestedInCandidateGeneration {
         experimentalSimClustersANNConfigId,
         params)
 
-    // SimClusters ANN cluster 1 Query
+    // SimClusters ANN cluster 1 Query.
     val interestedInSimClustersANN1Query =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -496,7 +496,7 @@ object SimClustersInterestedInCandidateGeneration {
         simClustersANN1ConfigId,
         params)
 
-    // SimClusters ANN cluster 2 Query
+    // SimClusters ANN cluster 2 Query.
     val interestedInSimClustersANN2Query =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -521,7 +521,7 @@ object SimClustersInterestedInCandidateGeneration {
         simClustersANN2ConfigId,
         params)
 
-    // SimClusters ANN cluster 3 Query
+    // SimClusters ANN cluster 3 Query.
     val interestedInSimClustersANN3Query =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -546,7 +546,7 @@ object SimClustersInterestedInCandidateGeneration {
         simClustersANN3ConfigId,
         params)
 
-    // SimClusters ANN cluster 5 Query
+    // SimClusters ANN cluster 5 Query.
     val interestedInSimClustersANN5Query =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,
@@ -554,7 +554,8 @@ object SimClustersInterestedInCandidateGeneration {
         simClustersModelVersion,
         simClustersANN5ConfigId,
         params)
-    // SimClusters ANN cluster 4 Query
+
+    // SimClusters ANN cluster 4 Query.
     val interestedInSimClustersANN4Query =
       SimClustersANNSimilarityEngine.fromParams(
         internalId,

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/TopicTweetCandidateGenerator.scala

@@ -116,7 +116,7 @@ class TopicTweetCandidateGenerator @Inject() (
         val tweetIds = candidates.map(_.tweetId).toSet
         val numTweetsPreFilter = tweetIds.size
         Future.collect(tweetInfoStore.multiGet(tweetIds)).map { tweetInfos =>
-          /** *
+          /**
            * If tweetInfo does not exist, we will filter out this tweet candidate.
            */
           val tweetyPieFilteredInitialCandidates = candidates.collect {
@@ -142,7 +142,6 @@ class TopicTweetCandidateGenerator @Inject() (
           topicId -> tweetyPieFilteredInitialCandidates
         }
     }
-
     Future.collect(initialCandidates.toSeq).map(_.toMap)
   }
 
@@ -152,7 +151,6 @@ class TopicTweetCandidateGenerator @Inject() (
     isVideoOnly: Boolean,
     excludeTweetIds: Set[TweetId]
   ): Future[Map[TopicId, Seq[InitialCandidate]]] = {
-
     val earliestTweetId = SnowflakeId.firstIdFor(Time.now - maxTweetAge)
 
     val filteredResults = topicTweetMap.map {

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/candidate_generation/UtegTweetCandidateGenerator.scala

@@ -46,18 +46,16 @@ class UtegTweetCandidateGenerator @Inject() (
   def get(
     query: UtegTweetCandidateGeneratorQuery
   ): Future[Seq[TweetWithScoreAndSocialProof]] = {
-
     val allStats = stats.scope("all")
     val perProductStats = stats.scope("perProduct", query.product.toString)
     StatsUtil.trackItemsStats(allStats) {
       StatsUtil.trackItemsStats(perProductStats) {
-
         /**
          * The candidate we return in the end needs a social proof field, which isn't
          * supported by the any existing Candidate type, so we created TweetWithScoreAndSocialProof
          * instead.
          *
-         * However, filters and light ranker expect Candidate-typed param to work. In order to minimise the
+         * However, filters and light ranker expect Candidate-typed param to work. In order to minimize the
          * changes to them, we are doing conversions from/to TweetWithScoreAndSocialProof to/from Candidate
          * in this method.
          */
@@ -111,7 +109,6 @@ class UtegTweetCandidateGenerator @Inject() (
         candidate.toRankedCandidate(score)
       }
     )
-
   }
 
   def fetchCandidates(
@@ -136,7 +133,7 @@ class UtegTweetCandidateGenerator @Inject() (
   ): Future[Seq[InitialCandidate]] = {
     val tweetIds = candidates.map(_.tweetId).toSet
     Future.collect(tweetInfoStore.multiGet(tweetIds)).map { tweetInfos =>
-      /** *
+      /**
        * If tweetInfo does not exist, we will filter out this tweet candidate.
        */
       candidates.collect {
@@ -172,7 +169,7 @@ class UtegTweetCandidateGenerator @Inject() (
             candidate.predictionScore,
             tweet.socialProofByType
           )
-        // The exception should never be thrown
+        // The exception should never be thrown.
         }.getOrElse(throw new Exception("Cannot find ranked candidate in original UTEG tweets"))
     }
   }

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/config/SimClustersANNConfig.scala

@@ -41,12 +41,11 @@ object SimClustersANNConfig {
     annAlgorithm = ScoringAlgorithm.CosineSimilarity,
   )
 
-  /*
-  SimClustersANNConfigId: String
-  Format: Prod - “EmbeddingType_ModelVersion_Default”
-  Format: Experiment - “EmbeddingType_ModelVersion_Date_Two-Digit-Serial-Number”. Date : YYYYMMDD
+  /**
+   * SimClustersANNConfigId: String
+   * Format: Prod - “EmbeddingType_ModelVersion_Default”
+   * Format: Experiment - “EmbeddingType_ModelVersion_Date_Two-Digit-Serial-Number”. Date : YYYYMMDD
    */
-
   private val FavBasedProducer_Model20m145k2020_Default = DefaultConfig.copy()
 
   // Chunnan's exp on maxTweetCandidateAgeDays 2
@@ -142,12 +141,14 @@ object SimClustersANNConfig {
       candidateEmbeddingType = EmbeddingType.LogFavBasedRealTimeTweet,
       maxTweetCandidateAge = 1.hours
     )
+
   // SANN-4 config
   private val LogFavLongestL2EmbeddingTweet_Model20m145k2020_20221220 =
     LogFavLongestL2EmbeddingTweet_Model20m145k2020_Default.copy(
       candidateEmbeddingType = EmbeddingType.LogFavBasedEvergreenTweet,
       maxTweetCandidateAge = 48.hours
     )
+
   private val UnfilteredUserInterestedIn_Model20m145k2020_Default = DefaultConfig.copy()
 
   // Chunnan's exp on maxTweetCandidateAgeDays 2
@@ -199,6 +200,7 @@ object SimClustersANNConfig {
       candidateEmbeddingType = EmbeddingType.LogFavBasedEvergreenTweet,
       maxTweetCandidateAge = 48.hours
     )
+
   private val LogFavBasedUserInterestedInFromAPE_Model20m145k2020_Default = DefaultConfig.copy()
 
   // Chunnan's exp on maxTweetCandidateAgeDays 2
@@ -302,6 +304,7 @@ object SimClustersANNConfig {
       candidateEmbeddingType = EmbeddingType.LogFavBasedEvergreenTweet,
       maxTweetCandidateAge = 48.hours
     )
+
   private val UserNextInterestedIn_Model20m145k2020_Default = DefaultConfig.copy()
 
   // Chunnan's exp on maxTweetCandidateAgeDays 2
@@ -353,7 +356,8 @@ object SimClustersANNConfig {
       candidateEmbeddingType = EmbeddingType.LogFavBasedEvergreenTweet,
       maxTweetCandidateAge = 48.hours
     )
-  // Vincent's experiment on using FollowBasedProducer as query embedding type for UserFollow
+
+  // Vincent's experiment on using FollowBasedProducer as query embedding type for UserFollow.
   private val FollowBasedProducer_Model20m145k2020_Default =
     FavBasedProducer_Model20m145k2020_Default.copy()
 
@@ -400,6 +404,7 @@ object SimClustersANNConfig {
       candidateEmbeddingType = EmbeddingType.LogFavBasedEvergreenTweet,
       maxTweetCandidateAge = 48.hours
     )
+    
   val DefaultConfigMappings: Map[String, SimClustersANNConfig] = Map(
     "FavBasedProducer_Model20m145k2020_Default" -> FavBasedProducer_Model20m145k2020_Default,
     "FavBasedProducer_Model20m145k2020_20220617_06" -> FavBasedProducer_Model20m145k2020_20220617_06,

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/config/TimeoutConfig.scala

@@ -3,22 +3,22 @@ package com.twitter.cr_mixer.config
 import com.twitter.util.Duration
 
 case class TimeoutConfig(
-  /* Default timeouts for candidate generator */
+  // Default timeouts for candidate generator.
   serviceTimeout: Duration,
   signalFetchTimeout: Duration,
   similarityEngineTimeout: Duration,
   annServiceClientTimeout: Duration,
-  /* For Uteg Candidate Generator */
+  // For Uteg Candidate Generator.
   utegSimilarityEngineTimeout: Duration,
-  /* For User State Store */
+  // For User State Store
   userStateUnderlyingStoreTimeout: Duration,
   userStateStoreTimeout: Duration,
-  /* For FRS based tweets */
-  // Timeout passed to EarlyBird server
+  // For FRS based tweets .
+  // Timeout passed to EarlyBird server.
   earlybirdServerTimeout: Duration,
   // Timeout set on CrMixer side
   earlybirdSimilarityEngineTimeout: Duration,
   frsBasedTweetEndpointTimeout: Duration,
   topicTweetEndpointTimeout: Duration,
-  // Timeout Settings for Navi gRPC Client
+  // Timeout Settings for Navi gRPC Client.
   naviRequestTimeout: Duration)

cr-mixer/server/src/main/scala/com/twitter/cr_mixer/controller/CrMixerThriftController.scala

@@ -101,7 +101,7 @@ class CrMixerThriftController @Inject() (
       ExceptionUtils.getStackTrace(e)
     ).mkString("\n")
 
-    /** *
+    /**
      * We chose logger.info() here to print message instead of logger.error since that
      * logger.error sometimes suppresses detailed stacktrace.
      */
@@ -109,8 +109,7 @@ class CrMixerThriftController @Inject() (
   }
 
   private def generateRequestUUID(): Long = {
-
-    /** *
+    /**
      * We generate unique UUID via bitwise operations. See the below link for more:
      * https://stackoverflow.com/questions/15184820/how-to-generate-unique-positive-long-using-uuid
      */
@@ -119,7 +118,6 @@ class CrMixerThriftController @Inject() (
 
   handle(t.CrMixer.GetTweetRecommendations) { args: t.CrMixer.GetTweetRecommendations.Args =>
     val endpointName = "getTweetRecommendations"
-
     val requestUUID = generateRequestUUID()
     val startTime = Time.now.inMilliseconds
     val userId = args.request.clientContext.userId.getOrElse(
@@ -168,10 +166,9 @@ class CrMixerThriftController @Inject() (
           Future(CrMixerTweetResponse(Seq.empty))
       }
     }
-
   }
 
-  /** *
+  /**
    * GetRelatedTweetsForQueryTweet and GetRelatedTweetsForQueryAuthor are essentially
    * doing very similar things, except that one passes in TweetId which calls TweetBased engine,
    * and the other passes in AuthorId which calls ProducerBased engine.
@@ -221,7 +218,6 @@ class CrMixerThriftController @Inject() (
           Future(RelatedTweetResponse(Seq.empty))
       }
     }
-
   }
 
   private def getRelatedVideoTweets(
@@ -330,7 +326,6 @@ class CrMixerThriftController @Inject() (
           Future(AdsResponse(Seq.empty))
       }
     }
-
   }
 
   private def buildCrCandidateGeneratorQuery(
@@ -338,7 +333,6 @@ class CrMixerThriftController @Inject() (
     requestUUID: Long,
     userId: Long
   ): Future[CrCandidateGeneratorQuery] = {
-
     val product = thriftRequest.product
     val productContext = thriftRequest.productContext
     val scopedStats = statsReceiver
@@ -357,7 +351,7 @@ class CrMixerThriftController @Inject() (
             userState
           )
 
-        // Specify product-specific behavior mapping here
+        // Specify product-specific behavior mapping here.
         val maxNumResults = (product, productContext) match {
           case (t.Product.Home, Some(t.ProductContext.HomeContext(homeContext))) =>
             homeContext.maxResults.getOrElse(9999)
@@ -392,7 +386,6 @@ class CrMixerThriftController @Inject() (
     thriftRequest: RelatedTweetRequest,
     requestUUID: Long
   ): Future[RelatedTweetCandidateGeneratorQuery] = {
-
     val product = thriftRequest.product
     val scopedStats = statsReceiver
       .scope(product.toString).scope("RelatedTweetRequest")
@@ -409,8 +402,8 @@ class CrMixerThriftController @Inject() (
           thriftRequest.product,
           userState)
 
-      // Specify product-specific behavior mapping here
-      // Currently, Home takes 10, and RUX takes 100
+      // Specify product-specific behavior mapping here.
+      // Currently, Home takes 10, and RUX takes 100.
       val maxNumResults = params(RelatedTweetGlobalParams.MaxCandidatesPerRequestParam)
 
       RelatedTweetCandidateGeneratorQuery(
@@ -458,7 +451,6 @@ class CrMixerThriftController @Inject() (
     thriftRequest: RelatedVideoTweetRequest,
     requestUUID: Long
   ): Future[RelatedVideoTweetCandidateGeneratorQuery] = {
-
     val product = thriftRequest.product
     val scopedStats = statsReceiver
       .scope(product.toString).scope("RelatedVideoTweetRequest")
@@ -487,14 +479,12 @@ class CrMixerThriftController @Inject() (
         requestUUID = requestUUID
       )
     }
-
   }
 
   private def buildUtegTweetQuery(
     thriftRequest: UtegTweetRequest,
     requestUUID: Long
   ): Future[UtegTweetCandidateGeneratorQuery] = {
-
     val userId = thriftRequest.clientContext.userId.getOrElse(
       throw new IllegalArgumentException("userId must be present in the Thrift clientContext")
     )
@@ -536,7 +526,6 @@ class CrMixerThriftController @Inject() (
           requestUUID = requestUUID
         )
       }
-
   }
 
   private def buildTopicTweetQuery(
@@ -550,7 +539,7 @@ class CrMixerThriftController @Inject() (
     val product = thriftRequest.product
     val productContext = thriftRequest.productContext
 
-    // Specify product-specific behavior mapping here
+    // Specify product-specific behavior mapping here.
     val isVideoOnly = (product, productContext) match {
       case (t.Product.ExploreTopics, Some(t.ProductContext.ExploreContext(context))) =>
         context.isVideoOnly
@@ -646,7 +635,6 @@ class CrMixerThriftController @Inject() (
   private def buildThriftResponse(
     candidates: Seq[RankedCandidate]
   ): CrMixerTweetResponse = {
-
     val tweets = candidates.map { candidate =>
       TweetRecommendation(
         tweetId = candidate.tweetId,
@@ -663,7 +651,7 @@ class CrMixerThriftController @Inject() (
   private def scribeTweetScoreFunnelSeries(
     candidates: Seq[RankedCandidate]
   ): Seq[RankedCandidate] = {
-    // 202210210901 is a random number for code search of Lensview
+    // 202210210901 is a random number for code search of Lensview.
     tweetScoreFunnelSeries.startNewSpan(
       name = "GetTweetRecommendationsTopLevelTweetSimilarityEngineType",
       codePtr = 202210210901L) {
@@ -734,7 +722,6 @@ class CrMixerThriftController @Inject() (
     request: CrMixerTweetRequest,
     response: Future[CrMixerTweetResponse]
   ): Unit = {
-
     val userId = request.clientContext.userId.getOrElse(
       throw new IllegalArgumentException(
         "userId must be present in getTweetRecommendations() Thrift clientContext"))

home-mixer/README.md

@@ -74,7 +74,7 @@ Timeline tabs powered by Home Mixer.
             - ScoredTweetsRecommendationPipelineConfig (main Tweet recommendation layer)
                 - Fetch Tweet Candidates
                     - ScoredTweetsInNetworkCandidatePipelineConfig
-                    - ScoredTweetsCrMixerCandidatePipelineConfig
+                    - ScoredTweetsTweetMixerCandidatePipelineConfig
                     - ScoredTweetsUtegCandidatePipelineConfig
                     - ScoredTweetsFrsCandidatePipelineConfig
                 - Feature Hydration and Scoring
@@ -99,4 +99,3 @@ Timeline tabs powered by Home Mixer.
         - ListTweetsTimelineServiceCandidatePipelineConfig (fetch tweets from timeline service)
         - ConversationServiceCandidatePipelineConfig (fetch ancestors for conversation modules)
         - ListTweetsAdsCandidatePipelineConfig (fetch ads)
-

home-mixer/server/src/main/scala/com/twitter/home_mixer/BUILD.bazel

@@ -21,6 +21,7 @@ scala_library(
         "finatra/inject/inject-utils/src/main/scala",
         "home-mixer/server/src/main/resources",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/controller",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/federated",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/module",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/product",
@@ -31,6 +32,10 @@ scala_library(
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/module/stringcenter",
         "product-mixer/core/src/main/thrift/com/twitter/product_mixer/core:thrift-scala",
         "src/thrift/com/twitter/timelines/render:thrift-scala",
+        "strato/config/columns/auth-context:auth-context-strato-client",
+        "strato/config/columns/gizmoduck:gizmoduck-strato-client",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
         "stringcenter/client",
         "stringcenter/client/src/main/java",
         "stringcenter/client/src/main/scala/com/twitter/stringcenter/client",

home-mixer/server/src/main/scala/com/twitter/home_mixer/HomeMixerHttpServerWarmupHandler.scala

@@ -2,7 +2,7 @@ package com.twitter.home_mixer
 
 import com.twitter.finatra.http.routing.HttpWarmup
 import com.twitter.finatra.httpclient.RequestBuilder._
-import com.twitter.inject.Logging
+import com.twitter.util.logging.Logging
 import com.twitter.inject.utils.Handler
 import com.twitter.util.Try
 import javax.inject.Inject

home-mixer/server/src/main/scala/com/twitter/home_mixer/HomeMixerServer.scala

@@ -12,57 +12,63 @@ import com.twitter.finatra.thrift.ThriftServer
 import com.twitter.finatra.thrift.filters._
 import com.twitter.finatra.thrift.routing.ThriftRouter
 import com.twitter.home_mixer.controller.HomeThriftController
+import com.twitter.home_mixer.federated.HomeMixerColumn
 import com.twitter.home_mixer.module._
 import com.twitter.home_mixer.param.GlobalParamConfigModule
 import com.twitter.home_mixer.product.HomeMixerProductModule
 import com.twitter.home_mixer.{thriftscala => st}
 import com.twitter.product_mixer.component_library.module.AccountRecommendationsMixerModule
-import com.twitter.product_mixer.component_library.module.CrMixerClientModule
 import com.twitter.product_mixer.component_library.module.DarkTrafficFilterModule
 import com.twitter.product_mixer.component_library.module.EarlybirdModule
 import com.twitter.product_mixer.component_library.module.ExploreRankerClientModule
 import com.twitter.product_mixer.component_library.module.GizmoduckClientModule
 import com.twitter.product_mixer.component_library.module.OnboardingTaskServiceModule
 import com.twitter.product_mixer.component_library.module.SocialGraphServiceModule
-import com.twitter.product_mixer.component_library.module.TimelineMixerClientModule
 import com.twitter.product_mixer.component_library.module.TimelineRankerClientModule
 import com.twitter.product_mixer.component_library.module.TimelineScorerClientModule
 import com.twitter.product_mixer.component_library.module.TimelineServiceClientModule
 import com.twitter.product_mixer.component_library.module.TweetImpressionStoreModule
+import com.twitter.product_mixer.component_library.module.TweetMixerClientModule
 import com.twitter.product_mixer.component_library.module.UserSessionStoreModule
 import com.twitter.product_mixer.core.controllers.ProductMixerController
 import com.twitter.product_mixer.core.module.LoggingThrowableExceptionMapper
 import com.twitter.product_mixer.core.module.ProductMixerModule
-import com.twitter.product_mixer.core.module.StratoClientModule
 import com.twitter.product_mixer.core.module.stringcenter.ProductScopeStringCenterModule
+import com.twitter.strato.fed.StratoFed
+import com.twitter.strato.fed.server.StratoFedServer
 
 object HomeMixerServerMain extends HomeMixerServer
 
-class HomeMixerServer extends ThriftServer with Mtls with HttpServer with HttpMtls {
+class HomeMixerServer
+    extends StratoFedServer
+    with ThriftServer
+    with Mtls
+    with HttpServer
+    with HttpMtls {
   override val name = "home-mixer-server"
 
   override val modules: Seq[Module] = Seq(
     AccountRecommendationsMixerModule,
     AdvertiserBrandSafetySettingsStoreModule,
+    BlenderClientModule,
     ClientSentImpressionsPublisherModule,
     ConversationServiceModule,
-    CrMixerClientModule,
     EarlybirdModule,
     ExploreRankerClientModule,
+    FeedbackHistoryClientModule,
     GizmoduckClientModule,
     GlobalParamConfigModule,
     HomeAdsCandidateSourceModule,
     HomeMixerFlagsModule,
     HomeMixerProductModule,
     HomeMixerResourcesModule,
-    HomeNaviModelClientModule,
     ImpressionBloomFilterModule,
     InjectionHistoryClientModule,
-    FeedbackHistoryClientModule,
     ManhattanClientsModule,
     ManhattanFeatureRepositoryModule,
     ManhattanTweetImpressionStoreModule,
     MemcachedFeatureRepositoryModule,
+    NaviModelClientModule,
     OnboardingTaskServiceModule,
     OptimizedStratoClientModule,
     PeopleDiscoveryServiceModule,
@@ -74,24 +80,23 @@ class HomeMixerServer extends ThriftServer with Mtls with HttpServer with HttpMt
     SimClustersRecentEngagementsClientModule,
     SocialGraphServiceModule,
     StaleTweetsCacheModule,
-    StratoClientModule,
     ThriftFeatureRepositoryModule,
-    TimelineMixerClientModule,
     TimelineRankerClientModule,
     TimelineScorerClientModule,
     TimelineServiceClientModule,
     TimelinesPersistenceStoreClientModule,
+    TopicSocialProofClientModule,
     TweetImpressionStoreModule,
-    TweetyPieClientModule,
+    TweetMixerClientModule,
+    TweetypieClientModule,
     TweetypieStaticEntitiesCacheClientModule,
-    UserMetadataStoreModule,
     UserSessionStoreModule,
     new DarkTrafficFilterModule[st.HomeMixer.ReqRepServicePerEndpoint](),
     new MtlsThriftWebFormsModule[st.HomeMixer.MethodPerEndpoint](this),
     new ProductScopeStringCenterModule()
   )
 
-  def configureThrift(router: ThriftRouter): Unit = {
+  override def configureThrift(router: ThriftRouter): Unit = {
     router
       .filter[LoggingMDCFilter]
       .filter[TraceIdMDCFilter]
@@ -111,6 +116,11 @@ class HomeMixerServer extends ThriftServer with Mtls with HttpServer with HttpMt
         this.injector,
         st.HomeMixer.ExecutePipeline))
 
+  override val dest: String = "/s/home-mixer/home-mixer:strato"
+
+  override val columns: Seq[Class[_ <: StratoFed.Column]] =
+    Seq(classOf[HomeMixerColumn])
+
   override protected def warmup(): Unit = {
     handle[HomeMixerThriftServerWarmupHandler]()
     handle[HomeMixerHttpServerWarmupHandler]()

home-mixer/server/src/main/scala/com/twitter/home_mixer/HomeMixerThriftServerWarmupHandler.scala

@@ -3,7 +3,7 @@ package com.twitter.home_mixer
 import com.twitter.finagle.thrift.ClientId
 import com.twitter.finatra.thrift.routing.ThriftWarmup
 import com.twitter.home_mixer.{thriftscala => st}
-import com.twitter.inject.Logging
+import com.twitter.util.logging.Logging
 import com.twitter.inject.utils.Handler
 import com.twitter.product_mixer.core.{thriftscala => pt}
 import com.twitter.scrooge.Request

home-mixer/server/src/main/scala/com/twitter/home_mixer/candidate_pipeline/BUILD.bazel

@@ -5,19 +5,13 @@ scala_library(
     tags = ["bazel-compatible"],
     dependencies = [
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/candidate_source",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/gate",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/query_transformer",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/marshaller/timelines",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/following/model",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/following/param",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/service",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/tweetconvosvc",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/decorator/urt",
@@ -25,10 +19,6 @@ scala_library(
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/gate",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/model/candidate",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/transformer",
-        "timelinemixer/common/src/main/scala/com/twitter/timelinemixer/clients/manhattan",
-        "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/store/persistence",
-        "timelines/src/main/scala/com/twitter/timelines/injection/scribe",
-        "timelineservice/common/src/main/scala/com/twitter/timelineservice/model",
     ],
     exports = [
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/tweetconvosvc",

home-mixer/server/src/main/scala/com/twitter/home_mixer/candidate_pipeline/ConversationServiceCandidatePipelineConfig.scala

@@ -1,18 +1,23 @@
 package com.twitter.home_mixer.candidate_pipeline
 
+import com.twitter.home_mixer.functional_component.feature_hydrator.InNetworkFeatureHydrator
 import com.twitter.home_mixer.functional_component.feature_hydrator.NamesFeatureHydrator
-import com.twitter.home_mixer.functional_component.feature_hydrator.SocialGraphServiceFeatureHydrator
 import com.twitter.home_mixer.functional_component.feature_hydrator.TweetypieFeatureHydrator
 import com.twitter.home_mixer.functional_component.filter.InvalidConversationModuleFilter
-import com.twitter.home_mixer.functional_component.filter.PredicateFeatureFilter
+import com.twitter.home_mixer.functional_component.filter.InvalidSubscriptionTweetFilter
 import com.twitter.home_mixer.functional_component.filter.RetweetDeduplicationFilter
+import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.InReplyToTweetIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsHydratedFeature
 import com.twitter.home_mixer.model.HomeFeatures.QuotedTweetDroppedFeature
+import com.twitter.home_mixer.model.HomeFeatures.SourceTweetIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.SourceUserIdFeature
 import com.twitter.home_mixer.service.HomeMixerAlertConfig
 import com.twitter.product_mixer.component_library.candidate_source.tweetconvosvc.ConversationServiceCandidateSource
 import com.twitter.product_mixer.component_library.candidate_source.tweetconvosvc.ConversationServiceCandidateSourceRequest
 import com.twitter.product_mixer.component_library.candidate_source.tweetconvosvc.TweetWithConversationMetadata
 import com.twitter.product_mixer.component_library.filter.FeatureFilter
+import com.twitter.product_mixer.component_library.filter.PredicateFeatureFilter
 import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
 import com.twitter.product_mixer.core.functional_component.candidate_source.BaseCandidateSource
 import com.twitter.product_mixer.core.functional_component.decorator.CandidateDecorator
@@ -33,8 +38,8 @@ import com.twitter.product_mixer.core.pipeline.candidate.DependentCandidatePipel
 class ConversationServiceCandidatePipelineConfig[Query <: PipelineQuery](
   conversationServiceCandidateSource: ConversationServiceCandidateSource,
   tweetypieFeatureHydrator: TweetypieFeatureHydrator,
-  socialGraphServiceFeatureHydrator: SocialGraphServiceFeatureHydrator,
   namesFeatureHydrator: NamesFeatureHydrator,
+  invalidSubscriptionTweetFilter: InvalidSubscriptionTweetFilter,
   override val gates: Seq[BaseGate[Query]],
   override val decorator: Option[CandidateDecorator[Query, TweetCandidate]])
     extends DependentCandidatePipelineConfig[
@@ -62,10 +67,10 @@ class ConversationServiceCandidatePipelineConfig[Query <: PipelineQuery](
     val tweetsWithConversationMetadata = candidates.map { candidate =>
       TweetWithConversationMetadata(
         tweetId = candidate.candidateIdLong,
-        userId = None,
-        sourceTweetId = None,
-        sourceUserId = None,
-        inReplyToTweetId = None,
+        userId = candidate.features.getOrElse(AuthorIdFeature, None),
+        sourceTweetId = candidate.features.getOrElse(SourceTweetIdFeature, None),
+        sourceUserId = candidate.features.getOrElse(SourceUserIdFeature, None),
+        inReplyToTweetId = candidate.features.getOrElse(InReplyToTweetIdFeature, None),
         conversationId = None,
         ancestors = Seq.empty
       )
@@ -84,7 +89,10 @@ class ConversationServiceCandidatePipelineConfig[Query <: PipelineQuery](
 
   override val preFilterFeatureHydrationPhase1: Seq[
     BaseCandidateFeatureHydrator[Query, TweetCandidate, _]
-  ] = Seq(tweetypieFeatureHydrator, socialGraphServiceFeatureHydrator)
+  ] = Seq(
+    tweetypieFeatureHydrator,
+    InNetworkFeatureHydrator,
+  )
 
   override def filters: Seq[Filter[Query, TweetCandidate]] = Seq(
     RetweetDeduplicationFilter,
@@ -93,6 +101,7 @@ class ConversationServiceCandidatePipelineConfig[Query <: PipelineQuery](
       FilterIdentifier(QuotedTweetDroppedFilterId),
       shouldKeepCandidate = { features => !features.getOrElse(QuotedTweetDroppedFeature, false) }
     ),
+    invalidSubscriptionTweetFilter,
     InvalidConversationModuleFilter
   )
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/candidate_pipeline/ConversationServiceCandidatePipelineConfigBuilder.scala

@@ -1,9 +1,9 @@
 package com.twitter.home_mixer.candidate_pipeline
 
-import com.twitter.product_mixer.component_library.candidate_source.tweetconvosvc.ConversationServiceCandidateSource
 import com.twitter.home_mixer.functional_component.feature_hydrator.NamesFeatureHydrator
-import com.twitter.home_mixer.functional_component.feature_hydrator.SocialGraphServiceFeatureHydrator
 import com.twitter.home_mixer.functional_component.feature_hydrator.TweetypieFeatureHydrator
+import com.twitter.home_mixer.functional_component.filter.InvalidSubscriptionTweetFilter
+import com.twitter.product_mixer.component_library.candidate_source.tweetconvosvc.ConversationServiceCandidateSource
 import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
 import com.twitter.product_mixer.core.functional_component.decorator.CandidateDecorator
 import com.twitter.product_mixer.core.functional_component.gate.BaseGate
@@ -15,7 +15,7 @@ import javax.inject.Singleton
 class ConversationServiceCandidatePipelineConfigBuilder[Query <: PipelineQuery] @Inject() (
   conversationServiceCandidateSource: ConversationServiceCandidateSource,
   tweetypieFeatureHydrator: TweetypieFeatureHydrator,
-  socialGraphServiceFeatureHydrator: SocialGraphServiceFeatureHydrator,
+  invalidSubscriptionTweetFilter: InvalidSubscriptionTweetFilter,
   namesFeatureHydrator: NamesFeatureHydrator) {
 
   def build(
@@ -25,8 +25,8 @@ class ConversationServiceCandidatePipelineConfigBuilder[Query <: PipelineQuery]
     new ConversationServiceCandidatePipelineConfig(
       conversationServiceCandidateSource,
       tweetypieFeatureHydrator,
-      socialGraphServiceFeatureHydrator,
       namesFeatureHydrator,
+      invalidSubscriptionTweetFilter,
       gates,
       decorator
     )

home-mixer/server/src/main/scala/com/twitter/home_mixer/candidate_pipeline/EditedTweetsCandidatePipelineConfig.scala

@@ -1,7 +1,7 @@
 package com.twitter.home_mixer.candidate_pipeline
 
 import com.twitter.home_mixer.functional_component.candidate_source.StaleTweetsCacheCandidateSource
-import com.twitter.home_mixer.functional_component.decorator.HomeFeedbackActionInfoBuilder
+import com.twitter.home_mixer.functional_component.decorator.urt.builder.HomeFeedbackActionInfoBuilder
 import com.twitter.home_mixer.functional_component.feature_hydrator.NamesFeatureHydrator
 import com.twitter.home_mixer.functional_component.query_transformer.EditedTweetsCandidatePipelineQueryTransformer
 import com.twitter.home_mixer.service.HomeMixerAlertConfig

home-mixer/server/src/main/scala/com/twitter/home_mixer/controller/BUILD.bazel

@@ -13,8 +13,5 @@ scala_library(
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/service/debug_query",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/service/urt",
         "snowflake/src/main/scala/com/twitter/snowflake/id",
-        "src/thrift/com/twitter/context:twitter-context-scala",
-        "src/thrift/com/twitter/timelines/render:thrift-scala",
-        "twitter-context/src/main/scala",
     ],
 )

home-mixer/server/src/main/scala/com/twitter/home_mixer/controller/HomeThriftController.scala

@@ -7,6 +7,7 @@ import com.twitter.home_mixer.service.ScoredTweetsService
 import com.twitter.home_mixer.{thriftscala => t}
 import com.twitter.product_mixer.core.controllers.DebugTwitterContext
 import com.twitter.product_mixer.core.functional_component.configapi.ParamsBuilder
+import com.twitter.product_mixer.core.service.debug_query.DebugQueryService
 import com.twitter.product_mixer.core.service.urt.UrtService
 import com.twitter.snowflake.id.SnowflakeId
 import com.twitter.stitch.Stitch

home-mixer/server/src/main/scala/com/twitter/home_mixer/federated/BUILD.bazel

@@ -0,0 +1,24 @@
+scala_library(
+    sources = ["*.scala"],
+    compiler_option_sets = ["fatal_warnings"],
+    strict_deps = True,
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/marshaller/request",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
+        "home-mixer/thrift/src/main/thrift:thrift-scala",
+        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/configapi",
+        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/pipeline/product",
+        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/product/registry",
+        "product-mixer/core/src/main/thrift/com/twitter/product_mixer/core:thrift-scala",
+        "src/thrift/com/twitter/gizmoduck:thrift-scala",
+        "src/thrift/com/twitter/timelines/render:thrift-scala",
+        "stitch/stitch-repo/src/main/scala",
+        "strato/config/columns/auth-context:auth-context-strato-client",
+        "strato/config/columns/gizmoduck:gizmoduck-strato-client",
+        "strato/config/src/thrift/com/twitter/strato/graphql/timelines:graphql-timelines-scala",
+        "strato/src/main/scala/com/twitter/strato/callcontext",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)

home-mixer/server/src/main/scala/com/twitter/home_mixer/federated/HomeMixerColumn.scala

@@ -0,0 +1,217 @@
+package com.twitter.home_mixer.federated
+
+import com.twitter.gizmoduck.{thriftscala => gd}
+import com.twitter.home_mixer.marshaller.request.HomeMixerRequestUnmarshaller
+import com.twitter.home_mixer.model.request.HomeMixerRequest
+import com.twitter.home_mixer.{thriftscala => hm}
+import com.twitter.product_mixer.core.functional_component.configapi.ParamsBuilder
+import com.twitter.product_mixer.core.pipeline.product.ProductPipelineRequest
+import com.twitter.product_mixer.core.pipeline.product.ProductPipelineResult
+import com.twitter.product_mixer.core.product.registry.ProductPipelineRegistry
+import com.twitter.product_mixer.core.{thriftscala => pm}
+import com.twitter.stitch.Arrow
+import com.twitter.stitch.Stitch
+import com.twitter.strato.callcontext.CallContext
+import com.twitter.strato.catalog.OpMetadata
+import com.twitter.strato.config._
+import com.twitter.strato.data._
+import com.twitter.strato.fed.StratoFed
+import com.twitter.strato.generated.client.auth_context.AuditIpClientColumn
+import com.twitter.strato.generated.client.gizmoduck.CompositeOnUserClientColumn
+import com.twitter.strato.graphql.timelines.{thriftscala => gql}
+import com.twitter.strato.thrift.ScroogeConv
+import com.twitter.timelines.render.{thriftscala => tr}
+import com.twitter.util.Try
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class HomeMixerColumn @Inject() (
+  homeMixerRequestUnmarshaller: HomeMixerRequestUnmarshaller,
+  compositeOnUserClientColumn: CompositeOnUserClientColumn,
+  auditIpClientColumn: AuditIpClientColumn,
+  paramsBuilder: ParamsBuilder,
+  productPipelineRegistry: ProductPipelineRegistry)
+    extends StratoFed.Column(HomeMixerColumn.Path)
+    with StratoFed.Fetch.Arrow {
+
+  override val contactInfo: ContactInfo = ContactInfo(
+    contactEmail = "",
+    ldapGroup = "",
+    slackRoomId = ""
+  )
+
+  override val metadata: OpMetadata =
+    OpMetadata(
+      lifecycle = Some(Lifecycle.Production),
+      description =
+        Some(Description.PlainText("Federated Strato column for Timelines served via Home Mixer"))
+    )
+
+  private val bouncerAccess: Seq[Policy] = Seq(BouncerAccess())
+  private val finatraTestServiceIdentifiers: Seq[Policy] = Seq(
+    ServiceIdentifierPattern(
+      role = "",
+      service = "",
+      env = "",
+      zone = Seq(""))
+  )
+
+  override val policy: Policy = AnyOf(bouncerAccess ++ finatraTestServiceIdentifiers)
+
+  override type Key = gql.TimelineKey
+  override type View = gql.HomeTimelineView
+  override type Value = tr.Timeline
+
+  override val keyConv: Conv[Key] = ScroogeConv.fromStruct[gql.TimelineKey]
+  override val viewConv: Conv[View] = ScroogeConv.fromStruct[gql.HomeTimelineView]
+  override val valueConv: Conv[Value] = ScroogeConv.fromStruct[tr.Timeline]
+
+  private def createHomeMixerRequestArrow(
+    compositeOnUserClientColumn: CompositeOnUserClientColumn,
+    auditIpClientColumn: AuditIpClientColumn
+  ): Arrow[(Key, View), hm.HomeMixerRequest] = {
+
+    val populateUserRolesAndIp: Arrow[(Key, View), (Option[Set[String]], Option[String])] = {
+      val gizmoduckView: (gd.LookupContext, Set[gd.QueryFields]) =
+        (gd.LookupContext(), Set(gd.QueryFields.Roles))
+
+      val populateUserRoles = Arrow
+        .flatMap[(Key, View), Option[Set[String]]] { _ =>
+          Stitch.collect {
+            CallContext.twitterUserId.map { userId =>
+              compositeOnUserClientColumn.fetcher
+                .callStack(HomeMixerColumn.FetchCallstack)
+                .fetch(userId, gizmoduckView).map(_.v)
+                .map {
+                  _.flatMap(_.roles.map(_.roles.toSet)).getOrElse(Set.empty)
+                }
+            }
+          }
+        }
+
+      val populateIpAddress = Arrow
+        .flatMap[(Key, View), Option[String]](_ =>
+          auditIpClientColumn.fetcher
+            .callStack(HomeMixerColumn.FetchCallstack)
+            .fetch((), ()).map(_.v))
+
+      Arrow.join(
+        populateUserRoles,
+        populateIpAddress
+      )
+    }
+
+    Arrow.zipWithArg(populateUserRolesAndIp).map {
+      case ((key, view), (roles, ipAddress)) =>
+        val deviceContextOpt = Some(
+          hm.DeviceContext(
+            isPolling = CallContext.isPolling,
+            requestContext = view.requestContext,
+            latestControlAvailable = view.latestControlAvailable,
+            autoplayEnabled = view.autoplayEnabled
+          ))
+        val seenTweetIds = view.seenTweetIds.filter(_.nonEmpty)
+
+        val (product, productContext) = key match {
+          case gql.TimelineKey.HomeTimeline(_) | gql.TimelineKey.HomeTimelineV2(_) =>
+            (
+              hm.Product.ForYou,
+              hm.ProductContext.ForYou(
+                hm.ForYou(
+                  deviceContextOpt,
+                  seenTweetIds,
+                  view.dspClientContext,
+                  view.pushToHomeTweetId
+                )
+              ))
+          case gql.TimelineKey.HomeLatestTimeline(_) | gql.TimelineKey.HomeLatestTimelineV2(_) =>
+            (
+              hm.Product.Following,
+              hm.ProductContext.Following(
+                hm.Following(deviceContextOpt, seenTweetIds, view.dspClientContext)))
+          case gql.TimelineKey.CreatorSubscriptionsTimeline(_) =>
+            (
+              hm.Product.Subscribed,
+              hm.ProductContext.Subscribed(hm.Subscribed(deviceContextOpt, seenTweetIds)))
+          case _ => throw new UnsupportedOperationException(s"Unknown product: $key")
+        }
+
+        val clientContext = pm.ClientContext(
+          userId = CallContext.twitterUserId,
+          guestId = CallContext.guestId,
+          guestIdAds = CallContext.guestIdAds,
+          guestIdMarketing = CallContext.guestIdMarketing,
+          appId = CallContext.clientApplicationId,
+          ipAddress = ipAddress,
+          userAgent = CallContext.userAgent,
+          countryCode = CallContext.requestCountryCode,
+          languageCode = CallContext.requestLanguageCode,
+          isTwoffice = CallContext.isInternalOrTwoffice,
+          userRoles = roles,
+          deviceId = CallContext.deviceId,
+          mobileDeviceId = CallContext.mobileDeviceId,
+          mobileDeviceAdId = CallContext.adId,
+          limitAdTracking = CallContext.limitAdTracking
+        )
+
+        hm.HomeMixerRequest(
+          clientContext = clientContext,
+          product = product,
+          productContext = Some(productContext),
+          maxResults = Try(view.count.get.toInt).toOption.orElse(HomeMixerColumn.MaxCount),
+          cursor = view.cursor.filter(_.nonEmpty)
+        )
+    }
+  }
+
+  override val fetch: Arrow[(Key, View), Result[Value]] = {
+    val transformThriftIntoPipelineRequest: Arrow[
+      (Key, View),
+      ProductPipelineRequest[HomeMixerRequest]
+    ] = {
+      Arrow
+        .identity[(Key, View)]
+        .andThen {
+          createHomeMixerRequestArrow(compositeOnUserClientColumn, auditIpClientColumn)
+        }
+        .map {
+          case thriftRequest =>
+            val request = homeMixerRequestUnmarshaller(thriftRequest)
+            val params = paramsBuilder.build(
+              clientContext = request.clientContext,
+              product = request.product,
+              featureOverrides =
+                request.debugParams.flatMap(_.featureOverrides).getOrElse(Map.empty),
+            )
+            ProductPipelineRequest(request, params)
+        }
+    }
+
+    val underlyingProduct: Arrow[
+      ProductPipelineRequest[HomeMixerRequest],
+      ProductPipelineResult[tr.TimelineResponse]
+    ] = Arrow
+      .identity[ProductPipelineRequest[HomeMixerRequest]]
+      .map { pipelineRequest =>
+        val pipelineArrow = productPipelineRegistry
+          .getProductPipeline[HomeMixerRequest, tr.TimelineResponse](
+            pipelineRequest.request.product)
+          .arrow
+        (pipelineArrow, pipelineRequest)
+      }.applyArrow
+
+    transformThriftIntoPipelineRequest.andThen(underlyingProduct).map {
+      _.result match {
+        case Some(result) => found(result.timeline)
+        case _ => missing
+      }
+    }
+  }
+}
+
+object HomeMixerColumn {
+  val Path = "home-mixer/homeMixer.Timeline"
+  private val FetchCallstack = s"$Path:fetch"
+  private val MaxCount: Option[Int] = Some(100)
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/candidate_source/BUILD.bazel

@@ -10,11 +10,8 @@ scala_library(
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/candidate_source",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/pipeline",
-        "src/thrift/com/twitter/hermit/candidate:hermit-candidate-scala",
         "src/thrift/com/twitter/search:earlybird-scala",
         "stitch/stitch-timelineservice/src/main/scala",
-        "strato/config/columns/recommendations/similarity:similarity-strato-client",
-        "strato/src/main/scala/com/twitter/strato/client",
     ],
     exports = [
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/candidate_source",

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/BUILD.bazel

@@ -6,13 +6,11 @@ scala_library(
     dependencies = [
         "finagle/finagle-core/src/main",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/following/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/util",
-        "joinkey/src/main/scala/com/twitter/joinkey/context",
-        "joinkey/src/main/thrift/com/twitter/joinkey/context:joinkey-context-scala",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/decorator/urt",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/model/candidate",
         "product-mixer/core/src/main/java/com/twitter/product_mixer/core/product/guice/scope",
@@ -25,8 +23,6 @@ scala_library(
         "src/thrift/com/twitter/timelineservice/server/suggests/logging:thrift-scala",
         "stringcenter/client",
         "stringcenter/client/src/main/java",
-        "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/model/candidate",
-        "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/translation",
         "timelines/src/main/scala/com/twitter/timelines/injection/scribe",
     ],
 )

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/HomeConversationServiceCandidateDecorator.scala

@@ -1,6 +1,8 @@
 package com.twitter.home_mixer.functional_component.decorator
 
 import com.twitter.home_mixer.functional_component.decorator.builder.HomeConversationModuleMetadataBuilder
+import com.twitter.home_mixer.functional_component.decorator.builder.HomeTimelinesScoreInfoBuilder
+import com.twitter.home_mixer.functional_component.decorator.urt.builder.HomeFeedbackActionInfoBuilder
 import com.twitter.home_mixer.model.HomeFeatures.ConversationModuleFocalTweetIdFeature
 import com.twitter.product_mixer.component_library.decorator.urt.UrtItemCandidateDecorator
 import com.twitter.product_mixer.component_library.decorator.urt.UrtMultipleModulesDecorator

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/BUILD.bazel

@@ -8,7 +8,9 @@ scala_library(
         "finagle/finagle-core/src/main",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/following/model",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
+        "joinkey/src/main/scala/com/twitter/joinkey/context",
+        "joinkey/src/main/thrift/com/twitter/joinkey/context:joinkey-context-scala",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/model/candidate",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/decorator/urt/builder",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/marshaller/response/urt",
@@ -18,6 +20,7 @@ scala_library(
         "src/thrift/com/twitter/timelinescorer/common/scoredtweetcandidate:thrift-scala",
         "src/thrift/com/twitter/timelineservice/server/internal:thrift-scala",
         "src/thrift/com/twitter/timelineservice/server/suggests/logging:thrift-scala",
+        "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/model/candidate",
         "timelines/src/main/scala/com/twitter/timelines/injection/scribe",
     ],
 )

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/HomeAdsClientEventDetailsBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.builder
 
 import com.twitter.finagle.tracing.Trace
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/HomeClientEventDetailsBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.builder
 
 import com.twitter.bijection.Base64String
 import com.twitter.bijection.scrooge.BinaryScalaCodec

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/HomeTimelinesScoreInfoBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.ScoreFeature
 import com.twitter.home_mixer.param.HomeGlobalParams.EnableSendScoresToClient

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/HomeTweetTypePredicates.scala

@@ -1,8 +1,10 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.builder
 
 import com.twitter.conversions.DurationOps._
 import com.twitter.home_mixer.model.HomeFeatures._
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.BasicTopicContextFunctionalityType
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RecommendationTopicContextFunctionalityType
 import com.twitter.timelinemixer.injection.model.candidate.SemanticCoreFeatures
 import com.twitter.tweetypie.{thriftscala => tpt}
 
@@ -25,74 +27,76 @@ object HomeTweetTypePredicates {
     (
       "has_exclusive_conversation_author_id",
       _.getOrElse(ExclusiveConversationAuthorIdFeature, None).nonEmpty),
-    ("is_eligible_for_connect_boost", _.getOrElse(AuthorIsEligibleForConnectBoostFeature, false)),
+    ("is_eligible_for_connect_boost", _ => false),
     ("hashtag", _.getOrElse(EarlybirdFeature, None).exists(_.numHashtags > 0)),
     ("has_scheduled_space", _.getOrElse(AudioSpaceMetaDataFeature, None).exists(_.isScheduled)),
     ("has_recorded_space", _.getOrElse(AudioSpaceMetaDataFeature, None).exists(_.isRecorded)),
     ("is_read_from_cache", _.getOrElse(IsReadFromCacheFeature, false)),
-    (
-      "is_self_thread_tweet",
-      _.getOrElse(ConversationFeature, None).exists(_.isSelfThreadTweet.contains(true))),
     ("get_initial", _.getOrElse(GetInitialFeature, false)),
     ("get_newer", _.getOrElse(GetNewerFeature, false)),
     ("get_middle", _.getOrElse(GetMiddleFeature, false)),
     ("get_older", _.getOrElse(GetOlderFeature, false)),
     ("pull_to_refresh", _.getOrElse(PullToRefreshFeature, false)),
     ("polling", _.getOrElse(PollingFeature, false)),
-    ("tls_size_20_plus", _ => false),
-    ("near_empty", _ => false),
-    ("ranked_request", _ => false),
+    ("near_empty", _.getOrElse(ServedSizeFeature, None).exists(_ < 3)),
+    ("is_request_context_launch", _.getOrElse(IsLaunchRequestFeature, false)),
     ("mutual_follow", _.getOrElse(EarlybirdFeature, None).exists(_.fromMutualFollow)),
+    (
+      "less_than_10_mins_since_lnpt",
+      _.getOrElse(LastNonPollingTimeFeature, None).exists(_.untilNow < 10.minutes)),
+    ("served_in_conversation_module", _.getOrElse(ServedInConversationModuleFeature, false)),
     ("has_ticketed_space", _.getOrElse(AudioSpaceMetaDataFeature, None).exists(_.hasTickets)),
     ("in_utis_top5", _.getOrElse(PositionFeature, None).exists(_ < 5)),
-    ("is_utis_pos0", _.getOrElse(PositionFeature, None).exists(_ == 0)),
-    ("is_utis_pos1", _.getOrElse(PositionFeature, None).exists(_ == 1)),
-    ("is_utis_pos2", _.getOrElse(PositionFeature, None).exists(_ == 2)),
-    ("is_utis_pos3", _.getOrElse(PositionFeature, None).exists(_ == 3)),
-    ("is_utis_pos4", _.getOrElse(PositionFeature, None).exists(_ == 4)),
     (
-      "is_signup_request",
-      candidate => candidate.getOrElse(AccountAgeFeature, None).exists(_.untilNow < 30.minutes)),
-    ("empty_request", _ => false),
-    ("served_size_less_than_5", _.getOrElse(ServedSizeFeature, None).exists(_ < 5)),
-    ("served_size_less_than_10", _.getOrElse(ServedSizeFeature, None).exists(_ < 10)),
-    ("served_size_less_than_20", _.getOrElse(ServedSizeFeature, None).exists(_ < 20)),
+      "conversation_module_has_2_displayed_tweets",
+      _.getOrElse(ConversationModule2DisplayedTweetsFeature, false)),
+    ("empty_request", _.getOrElse(ServedSizeFeature, None).exists(_ == 0)),
     ("served_size_less_than_50", _.getOrElse(ServedSizeFeature, None).exists(_ < 50)),
     (
       "served_size_between_50_and_100",
       _.getOrElse(ServedSizeFeature, None).exists(size => size >= 50 && size < 100)),
     ("authored_by_contextual_user", _.getOrElse(AuthoredByContextualUserFeature, false)),
+    (
+      "is_self_thread_tweet",
+      _.getOrElse(ConversationFeature, None).exists(_.isSelfThreadTweet.contains(true))),
     ("has_ancestors", _.getOrElse(AncestorsFeature, Seq.empty).nonEmpty),
     ("full_scoring_succeeded", _.getOrElse(FullScoringSucceededFeature, false)),
+    ("served_size_less_than_20", _.getOrElse(ServedSizeFeature, None).exists(_ < 20)),
+    ("served_size_less_than_10", _.getOrElse(ServedSizeFeature, None).exists(_ < 10)),
+    ("served_size_less_than_5", _.getOrElse(ServedSizeFeature, None).exists(_ < 5)),
     (
       "account_age_less_than_30_minutes",
       _.getOrElse(AccountAgeFeature, None).exists(_.untilNow < 30.minutes)),
+    ("conversation_module_has_gap", _.getOrElse(ConversationModuleHasGapFeature, false)),
+    (
+      "directed_at_user_is_in_first_degree",
+      _.getOrElse(EarlybirdFeature, None).exists(_.directedAtUserIdIsInFirstDegree.contains(true))),
+    (
+      "has_semantic_core_annotation",
+      _.getOrElse(EarlybirdFeature, None).exists(_.semanticCoreAnnotations.nonEmpty)),
+    ("is_request_context_foreground", _.getOrElse(IsForegroundRequestFeature, false)),
     (
       "account_age_less_than_1_day",
       _.getOrElse(AccountAgeFeature, None).exists(_.untilNow < 1.day)),
     (
       "account_age_less_than_7_days",
       _.getOrElse(AccountAgeFeature, None).exists(_.untilNow < 7.days)),
-    (
-      "directed_at_user_is_in_first_degree",
-      _.getOrElse(EarlybirdFeature, None).exists(_.directedAtUserIdIsInFirstDegree.contains(true))),
-    ("root_user_is_in_first_degree", _ => false),
-    (
-      "has_semantic_core_annotation",
-      _.getOrElse(EarlybirdFeature, None).exists(_.semanticCoreAnnotations.nonEmpty)),
-    ("is_request_context_foreground", _.getOrElse(IsForegroundRequestFeature, false)),
     (
       "part_of_utt",
       _.getOrElse(EarlybirdFeature, None)
         .exists(_.semanticCoreAnnotations.exists(_.exists(annotation =>
           annotation.domainId == SemanticCoreFeatures.UnifiedTwitterTaxonomy)))),
+    (
+      "has_home_latest_request_past_week",
+      _.getOrElse(FollowingLastNonPollingTimeFeature, None).exists(_.untilNow < 7.days)),
+    ("is_utis_pos0", _.getOrElse(PositionFeature, None).exists(_ == 0)),
+    ("is_utis_pos1", _.getOrElse(PositionFeature, None).exists(_ == 1)),
+    ("is_utis_pos2", _.getOrElse(PositionFeature, None).exists(_ == 2)),
+    ("is_utis_pos3", _.getOrElse(PositionFeature, None).exists(_ == 3)),
+    ("is_utis_pos4", _.getOrElse(PositionFeature, None).exists(_ == 4)),
     ("is_random_tweet", _.getOrElse(IsRandomTweetFeature, false)),
     ("has_random_tweet_in_response", _.getOrElse(HasRandomTweetFeature, false)),
     ("is_random_tweet_above_in_utis", _.getOrElse(IsRandomTweetAboveFeature, false)),
-    ("is_request_context_launch", _.getOrElse(IsLaunchRequestFeature, false)),
-    ("viewer_is_employee", _ => false),
-    ("viewer_is_timelines_employee", _ => false),
-    ("viewer_follows_any_topics", _.getOrElse(UserFollowedTopicsCountFeature, None).exists(_ > 0)),
     (
       "has_ancestor_authored_by_viewer",
       candidate =>
@@ -100,11 +104,6 @@ object HomeTweetTypePredicates {
           .getOrElse(AncestorsFeature, Seq.empty).exists(ancestor =>
             candidate.getOrElse(ViewerIdFeature, 0L) == ancestor.userId)),
     ("ancestor", _.getOrElse(IsAncestorCandidateFeature, false)),
-    (
-      "root_ancestor",
-      candidate =>
-        candidate.getOrElse(IsAncestorCandidateFeature, false) && candidate
-          .getOrElse(InReplyToTweetIdFeature, None).isEmpty),
     (
       "deep_reply",
       candidate =>
@@ -119,23 +118,22 @@ object HomeTweetTypePredicates {
       "tweet_age_less_than_15_seconds",
       _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
         .exists(_.untilNow <= 15.seconds)),
-    ("is_followed_topic_tweet", _ => false),
-    ("is_recommended_topic_tweet", _ => false),
-    ("is_topic_tweet", _ => false),
-    ("preferred_language_matches_tweet_language", _ => false),
+    (
+      "less_than_1_hour_since_lnpt",
+      _.getOrElse(LastNonPollingTimeFeature, None).exists(_.untilNow < 1.hour)),
+    ("has_gte_10_favs", _.getOrElse(EarlybirdFeature, None).exists(_.favCountV2.exists(_ >= 10))),
     (
       "device_language_matches_tweet_language",
       candidate =>
         candidate.getOrElse(TweetLanguageFeature, None) ==
           candidate.getOrElse(DeviceLanguageFeature, None)),
+    (
+      "root_ancestor",
+      candidate =>
+        candidate.getOrElse(IsAncestorCandidateFeature, false) && candidate
+          .getOrElse(InReplyToTweetIdFeature, None).isEmpty),
     ("question", _.getOrElse(EarlybirdFeature, None).exists(_.hasQuestion.contains(true))),
-    ("in_network", _.getOrElse(FromInNetworkSourceFeature, true)),
-    ("viewer_follows_original_author", _ => false),
-    ("has_account_follow_prompt", _ => false),
-    ("has_relevance_prompt", _ => false),
-    ("has_topic_annotation_haug_prompt", _ => false),
-    ("has_topic_annotation_random_precision_prompt", _ => false),
-    ("has_topic_annotation_prompt", _ => false),
+    ("in_network", _.getOrElse(InNetworkFeature, true)),
     (
       "has_political_annotation",
       _.getOrElse(EarlybirdFeature, None).exists(
@@ -153,9 +151,14 @@ object HomeTweetTypePredicates {
       _.getOrElse(EarlybirdFeature, None)
         .exists(_.conversationControl.exists(_.isInstanceOf[tpt.ConversationControl.Community]))),
     ("has_zero_score", _.getOrElse(ScoreFeature, None).exists(_ == 0.0)),
-    ("is_viewer_not_invited_to_reply", _ => false),
-    ("is_viewer_invited_to_reply", _ => false),
-    ("has_gte_10_favs", _.getOrElse(EarlybirdFeature, None).exists(_.favCountV2.exists(_ >= 10))),
+    (
+      "is_followed_topic_tweet",
+      _.getOrElse(TopicContextFunctionalityTypeFeature, None)
+        .exists(_ == BasicTopicContextFunctionalityType)),
+    (
+      "is_recommended_topic_tweet",
+      _.getOrElse(TopicContextFunctionalityTypeFeature, None)
+        .exists(_ == RecommendationTopicContextFunctionalityType)),
     ("has_gte_100_favs", _.getOrElse(EarlybirdFeature, None).exists(_.favCountV2.exists(_ >= 100))),
     ("has_gte_1k_favs", _.getOrElse(EarlybirdFeature, None).exists(_.favCountV2.exists(_ >= 1000))),
     (
@@ -164,8 +167,6 @@ object HomeTweetTypePredicates {
     (
       "has_gte_100k_favs",
       _.getOrElse(EarlybirdFeature, None).exists(_.favCountV2.exists(_ >= 100000))),
-    ("above_neighbor_is_topic_tweet", _ => false),
-    ("is_topic_tweet_with_neighbor_below", _ => false),
     ("has_audio_space", _.getOrElse(AudioSpaceMetaDataFeature, None).exists(_.hasSpace)),
     ("has_live_audio_space", _.getOrElse(AudioSpaceMetaDataFeature, None).exists(_.isLive)),
     (
@@ -187,6 +188,7 @@ object HomeTweetTypePredicates {
     (
       "has_toxicity_score_above_threshold",
       _.getOrElse(EarlybirdFeature, None).exists(_.toxicityScore.exists(_ > 0.91))),
+    ("is_topic_tweet", _.getOrElse(TopicIdSocialContextFeature, None).isDefined),
     (
       "text_only",
       candidate =>
@@ -204,23 +206,50 @@ object HomeTweetTypePredicates {
     ("has_3_images", _.getOrElse(NumImagesFeature, None).exists(_ == 3)),
     ("has_4_images", _.getOrElse(NumImagesFeature, None).exists(_ == 4)),
     ("has_card", _.getOrElse(EarlybirdFeature, None).exists(_.hasCard)),
-    ("3_or_more_consecutive_not_in_network", _ => false),
-    ("2_or_more_consecutive_not_in_network", _ => false),
-    ("5_out_of_7_not_in_network", _ => false),
-    ("7_out_of_7_not_in_network", _ => false),
-    ("5_out_of_5_not_in_network", _ => false),
     ("user_follow_count_gte_50", _.getOrElse(UserFollowingCountFeature, None).exists(_ > 50)),
-    ("has_liked_by_social_context", _ => false),
-    ("has_followed_by_social_context", _ => false),
-    ("has_topic_social_context", _ => false),
-    ("timeline_entry_has_banner", _ => false),
-    ("served_in_conversation_module", _.getOrElse(ServedInConversationModuleFeature, false)),
     (
-      "conversation_module_has_2_displayed_tweets",
-      _.getOrElse(ConversationModule2DisplayedTweetsFeature, false)),
-    ("conversation_module_has_gap", _.getOrElse(ConversationModuleHasGapFeature, false)),
-    ("served_in_recap_tweet_candidate_module_injection", _ => false),
-    ("served_in_threaded_conversation_module", _ => false)
+      "has_liked_by_social_context",
+      candidateFeatures =>
+        candidateFeatures
+          .getOrElse(SGSValidLikedByUserIdsFeature, Seq.empty)
+          .exists(candidateFeatures
+            .getOrElse(PerspectiveFilteredLikedByUserIdsFeature, Seq.empty).toSet.contains)),
+    (
+      "has_followed_by_social_context",
+      _.getOrElse(SGSValidFollowedByUserIdsFeature, Seq.empty).nonEmpty),
+    (
+      "has_topic_social_context",
+      candidateFeatures =>
+        candidateFeatures
+          .getOrElse(TopicIdSocialContextFeature, None)
+          .isDefined &&
+          candidateFeatures.getOrElse(TopicContextFunctionalityTypeFeature, None).isDefined),
+    ("video_lte_10_sec", _.getOrElse(VideoDurationMsFeature, None).exists(_ <= 10000)),
+    (
+      "video_bt_10_60_sec",
+      _.getOrElse(VideoDurationMsFeature, None).exists(duration =>
+        duration > 10000 && duration <= 60000)),
+    ("video_gt_60_sec", _.getOrElse(VideoDurationMsFeature, None).exists(_ > 60000)),
+    (
+      "tweet_age_lte_30_minutes",
+      _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
+        .exists(_.untilNow <= 30.minutes)),
+    (
+      "tweet_age_lte_1_hour",
+      _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
+        .exists(_.untilNow <= 1.hour)),
+    (
+      "tweet_age_lte_6_hours",
+      _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
+        .exists(_.untilNow <= 6.hours)),
+    (
+      "tweet_age_lte_12_hours",
+      _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
+        .exists(_.untilNow <= 12.hours)),
+    (
+      "tweet_age_gte_24_hours",
+      _.getOrElse(OriginalTweetCreationTimeFromSnowflakeFeature, None)
+        .exists(_.untilNow >= 24.hours)),
   )
 
   val PredicateMap = CandidatePredicates.toMap

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/builder/ListClientEventDetailsBuilder.scala

@@ -8,7 +8,7 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ti
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.timelineservice.suggests.{thriftscala => st}
 
-object ListClientEventDetailsBuilder
+case class ListClientEventDetailsBuilder(suggestType: st.SuggestType)
     extends BaseClientEventDetailsBuilder[PipelineQuery, UniversalNoun[Any]] {
 
   override def apply(
@@ -20,7 +20,7 @@ object ListClientEventDetailsBuilder
       conversationDetails = None,
       timelinesDetails = Some(
         TimelinesDetails(
-          injectionType = Some(st.SuggestType.OrganicListTweet.name),
+          injectionType = Some(suggestType.name),
           controllerData = None,
           sourceData = None)),
       articleDetails = None,

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/AuthorChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.ScreenNamesFeature
 import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
@@ -9,7 +9,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ch
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
 import com.twitter.timelines.service.{thriftscala => t}
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/BUILD.bazel

@@ -4,9 +4,16 @@ scala_library(
     strict_deps = True,
     tags = ["bazel-compatible"],
     dependencies = [
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/following/model",
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/util",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/decorator/urt",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/premarshaller/urt/builder",
+        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/marshaller/response/urt",
         "src/thrift/com/twitter/timelines/service:thrift-scala",
         "src/thrift/com/twitter/timelineservice/server/internal:thrift-scala",
+        "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/model/candidate",
     ],
 )

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/BlockUserChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsRetweetFeature
@@ -13,7 +13,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ri
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RichFeedbackBehaviorBlockUser
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/DontLikeFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.conversions.DurationOps._
 import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
@@ -17,7 +17,6 @@ import com.twitter.timelines.common.{thriftscala => tlc}
 import com.twitter.timelineservice.model.FeedbackInfo
 import com.twitter.timelineservice.model.FeedbackMetadata
 import com.twitter.timelineservice.{thriftscala => tls}
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/EngagerSocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.RealNamesFeature
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/ExtendedReplySocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.FocalTweetAuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.FocalTweetInNetworkFeature

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/FeedbackStrings.scala

@@ -0,0 +1,18 @@
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
+
+import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
+import com.twitter.stringcenter.client.ExternalStringRegistry
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+
+@Singleton
+class FeedbackStrings @Inject() (
+  @ProductScoped externalStringRegistryProvider: Provider[ExternalStringRegistry]) {
+  private val externalStringRegistry = externalStringRegistryProvider.get()
+
+  val seeLessOftenFeedbackString =
+    externalStringRegistry.createProdString("Feedback.seeLessOften")
+  val seeLessOftenConfirmationFeedbackString =
+    externalStringRegistry.createProdString("Feedback.seeLessOftenConfirmation")
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/FeedbackUtil.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.conversions.DurationOps._
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.ChildFeedbackAction

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/FollowedBySocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
 import com.twitter.home_mixer.model.HomeFeatures.SGSValidFollowedByUserIdsFeature

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/HomeFeedbackActionInfoBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
 import com.twitter.home_mixer.model.request.FollowingProduct
@@ -12,7 +12,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Fe
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.timelines.service.{thriftscala => t}
 import com.twitter.timelines.util.FeedbackMetadataSerializer
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/HomeTweetSocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.ConversationModuleFocalTweetIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.ConversationModuleIdFeature
@@ -14,10 +14,13 @@ import javax.inject.Singleton
 @Singleton
 case class HomeTweetSocialContextBuilder @Inject() (
   likedBySocialContextBuilder: LikedBySocialContextBuilder,
+  listsSocialContextBuilder: ListsSocialContextBuilder,
   followedBySocialContextBuilder: FollowedBySocialContextBuilder,
   topicSocialContextBuilder: TopicSocialContextBuilder,
   extendedReplySocialContextBuilder: ExtendedReplySocialContextBuilder,
-  receivedReplySocialContextBuilder: ReceivedReplySocialContextBuilder)
+  receivedReplySocialContextBuilder: ReceivedReplySocialContextBuilder,
+  popularVideoSocialContextBuilder: PopularVideoSocialContextBuilder,
+  popularInYourAreaSocialContextBuilder: PopularInYourAreaSocialContextBuilder)
     extends BaseSocialContextBuilder[PipelineQuery, TweetCandidate] {
 
   def apply(
@@ -31,6 +34,9 @@ case class HomeTweetSocialContextBuilder @Inject() (
           likedBySocialContextBuilder(query, candidate, features)
             .orElse(followedBySocialContextBuilder(query, candidate, features))
             .orElse(topicSocialContextBuilder(query, candidate, features))
+            .orElse(popularVideoSocialContextBuilder(query, candidate, features))
+            .orElse(listsSocialContextBuilder(query, candidate, features))
+            .orElse(popularInYourAreaSocialContextBuilder(query, candidate, features))
         case Some(_) =>
           val conversationId = features.getOrElse(ConversationModuleIdFeature, None)
           // Only hydrate the social context into the root tweet in a conversation module

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/HomeWhoToFollowFeedbackActionInfoBuilder.scala

@@ -5,7 +5,6 @@ import com.twitter.product_mixer.component_library.model.candidate.UserCandidate
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
 import com.twitter.product_mixer.core.functional_component.decorator.urt.builder.metadata.BaseFeedbackActionInfoBuilder
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
-import com.twitter.stringcenter.client.ExternalStringRegistry
 import com.twitter.stringcenter.client.StringCenter
 import javax.inject.Inject
 import javax.inject.Provider
@@ -32,12 +31,13 @@ object HomeWhoToFollowFeedbackActionInfoBuilder {
 
 @Singleton
 case class HomeWhoToFollowFeedbackActionInfoBuilder @Inject() (
-  @ProductScoped externalStringRegistryProvider: Provider[ExternalStringRegistry],
+  feedbackStrings: FeedbackStrings,
   @ProductScoped stringCenterProvider: Provider[StringCenter])
     extends BaseFeedbackActionInfoBuilder[PipelineQuery, UserCandidate] {
 
   private val whoToFollowFeedbackActionInfoBuilder = WhoToFollowFeedbackActionInfoBuilder(
-    externalStringRegistry = externalStringRegistryProvider.get(),
+    seeLessOftenFeedbackString = feedbackStrings.seeLessOftenFeedbackString,
+    seeLessOftenConfirmationFeedbackString = feedbackStrings.seeLessOftenConfirmationFeedbackString,
     stringCenter = stringCenterProvider.get(),
     encodedFeedbackRequest = Some(HomeWhoToFollowFeedbackActionInfoBuilder.EncodedFeedbackRequest)
   )

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/HomeWhoToSubscribeFeedbackActionInfoBuilder.scala

@@ -0,0 +1,52 @@
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
+
+import com.twitter.product_mixer.component_library.decorator.urt.builder.metadata.WhoToFollowFeedbackActionInfoBuilder
+import com.twitter.product_mixer.component_library.model.candidate.UserCandidate
+import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
+import com.twitter.product_mixer.core.functional_component.decorator.urt.builder.metadata.BaseFeedbackActionInfoBuilder
+import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
+import com.twitter.stringcenter.client.StringCenter
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.FeedbackActionInfo
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.timelines.service.{thriftscala => tl}
+import com.twitter.timelines.util.FeedbackRequestSerializer
+import com.twitter.timelineservice.suggests.thriftscala.SuggestType
+import com.twitter.timelineservice.thriftscala.FeedbackType
+
+object HomeWhoToSubscribeFeedbackActionInfoBuilder {
+  private val FeedbackMetadata = tl.FeedbackMetadata(
+    injectionType = Some(SuggestType.WhoToSubscribe),
+    engagementType = None,
+    entityIds = Seq.empty,
+    ttlMs = None
+  )
+  private val FeedbackRequest =
+    tl.DefaultFeedbackRequest2(FeedbackType.SeeFewer, FeedbackMetadata)
+  private val EncodedFeedbackRequest =
+    FeedbackRequestSerializer.serialize(tl.FeedbackRequest.DefaultFeedbackRequest2(FeedbackRequest))
+}
+
+@Singleton
+case class HomeWhoToSubscribeFeedbackActionInfoBuilder @Inject() (
+  feedbackStrings: FeedbackStrings,
+  @ProductScoped stringCenterProvider: Provider[StringCenter])
+    extends BaseFeedbackActionInfoBuilder[PipelineQuery, UserCandidate] {
+
+  private val whoToSubscribeFeedbackActionInfoBuilder = WhoToFollowFeedbackActionInfoBuilder(
+    seeLessOftenFeedbackString = feedbackStrings.seeLessOftenFeedbackString,
+    seeLessOftenConfirmationFeedbackString = feedbackStrings.seeLessOftenConfirmationFeedbackString,
+    stringCenter = stringCenterProvider.get(),
+    encodedFeedbackRequest =
+      Some(HomeWhoToSubscribeFeedbackActionInfoBuilder.EncodedFeedbackRequest)
+  )
+
+  override def apply(
+    query: PipelineQuery,
+    candidate: UserCandidate,
+    candidateFeatures: FeatureMap
+  ): Option[FeedbackActionInfo] =
+    whoToSubscribeFeedbackActionInfoBuilder.apply(query, candidate, candidateFeatures)
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/LikedBySocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.PerspectiveFilteredLikedByUserIdsFeature
 import com.twitter.home_mixer.model.HomeFeatures.SGSValidLikedByUserIdsFeature

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/ListsSocialContextBuilder.scala

@@ -0,0 +1,50 @@
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
+
+import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
+import com.twitter.home_mixer.model.HomeFeatures.UserScreenNameFeature
+import com.twitter.home_mixer.product.following.model.HomeMixerExternalStrings
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
+import com.twitter.product_mixer.core.functional_component.decorator.urt.builder.social_context.BaseSocialContextBuilder
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.SocialContext
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata._
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
+import com.twitter.stringcenter.client.StringCenter
+import com.twitter.timelineservice.suggests.{thriftscala => t}
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+
+/**
+ * "Your Lists" will be rendered for the context and a url link for your lists.
+ */
+@Singleton
+case class ListsSocialContextBuilder @Inject() (
+  externalStrings: HomeMixerExternalStrings,
+  @ProductScoped stringCenterProvider: Provider[StringCenter])
+    extends BaseSocialContextBuilder[PipelineQuery, TweetCandidate] {
+
+  private val stringCenter = stringCenterProvider.get()
+  private val listString = externalStrings.ownedSubscribedListsModuleHeaderString
+
+  def apply(
+    query: PipelineQuery,
+    candidate: TweetCandidate,
+    candidateFeatures: FeatureMap
+  ): Option[SocialContext] = {
+    candidateFeatures.get(SuggestTypeFeature) match {
+      case Some(suggestType) if suggestType == t.SuggestType.RankedListTweet =>
+        val userName = query.features.flatMap(_.getOrElse(UserScreenNameFeature, None))
+        Some(
+          GeneralContext(
+            contextType = ListGeneralContextType,
+            text = stringCenter.prepare(listString),
+            url = userName.map(name => ""),
+            contextImageUrls = None,
+            landingUrl = None
+          ))
+      case _ => None
+    }
+  }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/MuteUserChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsRetweetFeature
@@ -12,7 +12,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ri
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RichFeedbackBehaviorToggleMuteUser
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/NotInterestedTopicFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
 import com.twitter.home_mixer.model.HomeFeatures.PerspectiveFilteredLikedByUserIdsFeature
@@ -15,7 +15,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ri
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RichFeedbackBehaviorMarkNotInterestedTopic
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/NotRelevantChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
 import com.twitter.home_mixer.product.following.model.HomeMixerExternalStrings
@@ -12,7 +12,6 @@ import com.twitter.timelines.common.{thriftscala => tlc}
 import com.twitter.timelineservice.model.FeedbackInfo
 import com.twitter.timelineservice.model.FeedbackMetadata
 import com.twitter.timelineservice.{thriftscala => tlst}
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/PopularInYourAreaSocialContextBuilder.scala

@@ -0,0 +1,43 @@
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
+
+import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
+import com.twitter.home_mixer.product.following.model.HomeMixerExternalStrings
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
+import com.twitter.product_mixer.core.functional_component.decorator.urt.builder.social_context.BaseSocialContextBuilder
+import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata._
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
+import com.twitter.stringcenter.client.StringCenter
+import com.twitter.timelineservice.suggests.{thriftscala => st}
+import javax.inject.Inject
+import javax.inject.Provider
+import javax.inject.Singleton
+
+@Singleton
+case class PopularInYourAreaSocialContextBuilder @Inject() (
+  externalStrings: HomeMixerExternalStrings,
+  @ProductScoped stringCenterProvider: Provider[StringCenter])
+    extends BaseSocialContextBuilder[PipelineQuery, TweetCandidate] {
+
+  private val stringCenter = stringCenterProvider.get()
+  private val popularInYourAreaString = externalStrings.socialContextPopularInYourAreaString
+
+  def apply(
+    query: PipelineQuery,
+    candidate: TweetCandidate,
+    candidateFeatures: FeatureMap
+  ): Option[SocialContext] = {
+    val suggestTypeOpt = candidateFeatures.getOrElse(SuggestTypeFeature, None)
+    if (suggestTypeOpt.contains(st.SuggestType.RecommendedTrendTweet)) {
+      Some(
+        GeneralContext(
+          contextType = LocationGeneralContextType,
+          text = stringCenter.prepare(popularInYourAreaString),
+          url = None,
+          contextImageUrls = None,
+          landingUrl = None
+        ))
+    } else None
+  }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/PopularVideoSocialContextBuilder.scala

@@ -1,50 +1,48 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
-import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
-import com.twitter.home_mixer.model.HomeFeatures.IsRetweetFeature
+import com.twitter.home_mixer.model.HomeFeatures.SuggestTypeFeature
 import com.twitter.home_mixer.product.following.model.HomeMixerExternalStrings
 import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
 import com.twitter.product_mixer.core.functional_component.decorator.urt.builder.social_context.BaseSocialContextBuilder
-import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.SocialContext
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata._
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
+import com.twitter.timelineservice.suggests.{thriftscala => st}
 import javax.inject.Inject
 import javax.inject.Provider
 import javax.inject.Singleton
 
-/**
- * Renders a fixed 'You Might Like' string above all OON Tweets.
- */
 @Singleton
-case class YouMightLikeSocialContextBuilder @Inject() (
+case class PopularVideoSocialContextBuilder @Inject() (
   externalStrings: HomeMixerExternalStrings,
   @ProductScoped stringCenterProvider: Provider[StringCenter])
     extends BaseSocialContextBuilder[PipelineQuery, TweetCandidate] {
 
   private val stringCenter = stringCenterProvider.get()
-  private val youMightLikeString = externalStrings.socialContextYouMightLikeString
+  private val popularVideoString = externalStrings.socialContextPopularVideoString
 
   def apply(
     query: PipelineQuery,
     candidate: TweetCandidate,
     candidateFeatures: FeatureMap
   ): Option[SocialContext] = {
-    val isInNetwork = candidateFeatures.getOrElse(InNetworkFeature, true)
-    val isRetweet = candidateFeatures.getOrElse(IsRetweetFeature, false)
-    if (!isInNetwork && !isRetweet) {
+    val suggestTypeOpt = candidateFeatures.getOrElse(SuggestTypeFeature, None)
+    if (suggestTypeOpt.contains(st.SuggestType.MediaTweet)) {
       Some(
         GeneralContext(
           contextType = SparkleGeneralContextType,
-          text = stringCenter.prepare(youMightLikeString),
+          text = stringCenter.prepare(popularVideoString),
           url = None,
           contextImageUrls = None,
-          landingUrl = None
+          landingUrl = Some(
+            Url(
+              urlType = DeepLink,
+              url = ""
+            )
+          )
         ))
-    } else {
-      None
-    }
+    } else None
   }
 }

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/ReceivedReplySocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.FocalTweetInNetworkFeature

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/ReportTweetChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.product.following.model.HomeMixerExternalStrings
 import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
@@ -8,7 +8,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ri
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RichFeedbackBehaviorReportTweet
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/RetweeterChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsRetweetFeature
@@ -10,7 +10,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ch
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
 import com.twitter.timelines.service.{thriftscala => t}
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/TopicSocialContextBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
 import com.twitter.home_mixer.model.HomeFeatures.TopicContextFunctionalityTypeFeature

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/decorator/urt/builder/UnfollowUserChildFeedbackActionBuilder.scala

@@ -1,4 +1,4 @@
-package com.twitter.home_mixer.functional_component.decorator
+package com.twitter.home_mixer.functional_component.decorator.urt.builder
 
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
@@ -11,7 +11,6 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.Ri
 import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RichFeedbackBehaviorToggleFollowUser
 import com.twitter.product_mixer.core.product.guice.scope.ProductScoped
 import com.twitter.stringcenter.client.StringCenter
-
 import javax.inject.Inject
 import javax.inject.Singleton
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/BUILD.bazel

@@ -4,95 +4,56 @@ scala_library(
     strict_deps = True,
     tags = ["bazel-compatible"],
     dependencies = [
-        "3rdparty/jvm/com/twitter/storehaus:core",
         "configapi/configapi-core/src/main/scala/com/twitter/timelines/configapi",
         "configapi/configapi-decider",
         "finatra/inject/inject-core/src/main/scala",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/author_features",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/content",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/earlybird",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/inferred_topic",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/twhin_embeddings",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/marshaller/timelines",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/scored_tweets/param",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/service",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/util",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/util/earlybird",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/util/tweetypie",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/util/tweetypie/content",
         "joinkey/src/main/scala/com/twitter/joinkey/context",
         "joinkey/src/main/thrift/com/twitter/joinkey/context:joinkey-context-scala",
-        "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/timeline_ranker",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/timelines_impression_store",
-        "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/topics",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/feature_hydrator/candidate/tweet_is_nsfw",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/feature_hydrator/candidate/tweet_visibility_reason",
+        "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/feature_hydrator/query/social_graph",
         "product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/model/candidate",
-        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/feature/datarecord",
-        "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/feature/featuremap/datarecord",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/candidate_source/strato",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/feature_hydrator",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/util",
-        "representation-scorer/server/src/main/scala/com/twitter/representationscorer/common",
-        "representation-scorer/server/src/main/thrift:thrift-scala",
-        "servo/repo/src/main/scala",
         "snowflake/src/main/scala/com/twitter/snowflake/id",
-        "src/java/com/twitter/ml/api/constant",
         "src/java/com/twitter/search/common/util/lang",
-        "src/scala/com/twitter/ml/api/util",
-        "src/scala/com/twitter/timelines/prediction/adapters/real_graph",
-        "src/scala/com/twitter/timelines/prediction/adapters/realtime_interaction_graph",
-        "src/scala/com/twitter/timelines/prediction/adapters/twistly",
-        "src/scala/com/twitter/timelines/prediction/adapters/two_hop_features",
-        "src/scala/com/twitter/timelines/prediction/common/util",
-        "src/scala/com/twitter/timelines/prediction/features/common",
-        "src/scala/com/twitter/timelines/prediction/features/realtime_interaction_graph",
-        "src/scala/com/twitter/timelines/prediction/features/recap",
-        "src/scala/com/twitter/timelines/prediction/features/time_features",
+        "src/scala/com/twitter/timelines/prediction/adapters/request_context",
         "src/thrift/com/twitter/gizmoduck:thrift-scala",
-        "src/thrift/com/twitter/ml/api:data-java",
-        "src/thrift/com/twitter/ml/api:embedding-java",
-        "src/thrift/com/twitter/onboarding/relevance/features:features-java",
         "src/thrift/com/twitter/recos/user_tweet_entity_graph:user_tweet_entity_graph-scala",
         "src/thrift/com/twitter/search:earlybird-scala",
         "src/thrift/com/twitter/search/common:constants-java",
         "src/thrift/com/twitter/socialgraph:thrift-scala",
         "src/thrift/com/twitter/spam/rtf:safety-result-scala",
         "src/thrift/com/twitter/timelineranker:thrift-scala",
-        "src/thrift/com/twitter/timelines/author_features:thrift-java",
-        "src/thrift/com/twitter/timelines/conversation_features:conversation_features-scala",
         "src/thrift/com/twitter/timelines/impression:thrift-scala",
         "src/thrift/com/twitter/timelines/impression_bloom_filter:thrift-scala",
         "src/thrift/com/twitter/timelines/real_graph:real_graph-scala",
         "src/thrift/com/twitter/timelinescorer/common/scoredtweetcandidate:thrift-scala",
-        "src/thrift/com/twitter/topic_recos:topic_recos-thrift-java",
         "src/thrift/com/twitter/tweetypie:service-scala",
         "src/thrift/com/twitter/tweetypie:tweet-scala",
         "src/thrift/com/twitter/user_session_store:thrift-java",
         "src/thrift/com/twitter/wtf/candidate:wtf-candidate-scala",
-        "src/thrift/com/twitter/wtf/real_time_interaction_graph:wtf-real_time_interaction_graph-thrift-java",
         "stitch/stitch-core",
         "stitch/stitch-gizmoduck",
         "stitch/stitch-socialgraph",
         "stitch/stitch-timelineservice",
         "stitch/stitch-tweetypie",
-        "strato/config/columns/topic-signals/tsp",
-        "strato/config/columns/topic-signals/tsp:tsp-strato-client",
         "timelinemixer/common/src/main/scala/com/twitter/timelinemixer/clients/feedback",
         "timelinemixer/common/src/main/scala/com/twitter/timelinemixer/clients/manhattan",
         "timelinemixer/common/src/main/scala/com/twitter/timelinemixer/clients/persistence",
-        "timelines/src/main/scala/com/twitter/timelines/clients/strato/twistly",
-        "timelines/src/main/scala/com/twitter/timelines/clients/user_tweet_entity_graph",
+        "timelines/src/main/scala/com/twitter/timelines/clients/manhattan/store",
         "timelines/src/main/scala/com/twitter/timelines/impressionstore/impressionbloomfilter",
         "timelines/src/main/scala/com/twitter/timelines/impressionstore/store",
         "timelineservice/common/src/main/scala/com/twitter/timelineservice/model",
-        "topic-social-proof/server/src/main/thrift:thrift-scala",
-        "topiclisting/topiclisting-core/src/main/scala/com/twitter/topiclisting",
-        "tweetconvosvc/thrift/src/main/thrift:thrift-scala",
-        "twitter-config/yaml",
         "user_session_store/src/main/scala/com/twitter/user_session_store",
         "util/util-core",
     ],

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/FeedbackHistoryQueryFeatureHydrator.scala

@@ -1,12 +1,10 @@
 package com.twitter.home_mixer.functional_component.feature_hydrator
 
 import com.twitter.home_mixer.model.HomeFeatures.FeedbackHistoryFeature
-import com.twitter.home_mixer.param.HomeGlobalParams.EnableFeedbackFatigueParam
 import com.twitter.product_mixer.core.feature.Feature
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
 import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
-import com.twitter.product_mixer.core.model.common.Conditionally
 import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.stitch.Stitch
@@ -17,16 +15,12 @@ import javax.inject.Singleton
 @Singleton
 case class FeedbackHistoryQueryFeatureHydrator @Inject() (
   feedbackHistoryClient: FeedbackHistoryManhattanClient)
-    extends QueryFeatureHydrator[PipelineQuery]
-    with Conditionally[PipelineQuery] {
+    extends QueryFeatureHydrator[PipelineQuery] {
 
   override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("FeedbackHistory")
 
   override val features: Set[Feature[_, _]] = Set(FeedbackHistoryFeature)
 
-  override def onlyIf(query: PipelineQuery): Boolean =
-    query.params(EnableFeedbackFatigueParam)
-
   override def hydrate(
     query: PipelineQuery
   ): Stitch[FeatureMap] =

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/FollowedTopicsQueryFeatureHydrator.scala

@@ -1,41 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.conversions.DurationOps._
-import com.twitter.home_mixer.model.HomeFeatures.UserFollowedTopicsCountFeature
-import com.twitter.home_mixer.service.HomeMixerAlertConfig
-import com.twitter.product_mixer.component_library.candidate_source.topics.FollowedTopicsCandidateSource
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.candidate_source.strato.StratoKeyView
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.stitch.Stitch
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-case class FollowedTopicsQueryFeatureHydrator @Inject() (
-  followedTopicsCandidateSource: FollowedTopicsCandidateSource)
-    extends QueryFeatureHydrator[PipelineQuery] {
-
-  override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("FollowedTopics")
-
-  override val features: Set[Feature[_, _]] = Set(UserFollowedTopicsCountFeature)
-
-  override def hydrate(query: PipelineQuery): Stitch[FeatureMap] = {
-    val request: StratoKeyView[Long, Unit] = StratoKeyView(query.getRequiredUserId, Unit)
-    followedTopicsCandidateSource(request)
-      .map { topics =>
-        FeatureMapBuilder().add(UserFollowedTopicsCountFeature, Some(topics.size)).build()
-      }.handle {
-        case _ => FeatureMapBuilder().add(UserFollowedTopicsCountFeature, None).build()
-      }
-  }
-
-  override val alerts = Seq(
-    HomeMixerAlertConfig.BusinessHours.defaultSuccessRateAlert(99.9),
-    HomeMixerAlertConfig.BusinessHours.defaultLatencyAlert(1500.millis)
-  )
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/GizmoduckAuthorSafetyFeatureHydrator.scala

@@ -1,58 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.gizmoduck.{thriftscala => gt}
-import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
-import com.twitter.home_mixer.model.HomeFeatures.AuthorIsBlueVerifiedFeature
-import com.twitter.home_mixer.param.HomeGlobalParams.EnableGizmoduckAuthorSafetyFeatureHydratorParam
-import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.CandidateFeatureHydrator
-import com.twitter.product_mixer.core.model.common.Conditionally
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.stitch.Stitch
-import com.twitter.stitch.gizmoduck.Gizmoduck
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class GizmoduckAuthorSafetyFeatureHydrator @Inject() (gizmoduck: Gizmoduck)
-    extends CandidateFeatureHydrator[PipelineQuery, TweetCandidate]
-    with Conditionally[PipelineQuery] {
-
-  override val identifier: FeatureHydratorIdentifier =
-    FeatureHydratorIdentifier("GizmoduckAuthorSafety")
-
-  override val features: Set[Feature[_, _]] = Set(AuthorIsBlueVerifiedFeature)
-
-  override def onlyIf(query: PipelineQuery): Boolean =
-    query.params(EnableGizmoduckAuthorSafetyFeatureHydratorParam)
-
-  private val queryFields: Set[gt.QueryFields] = Set(gt.QueryFields.Safety)
-
-  override def apply(
-    query: PipelineQuery,
-    candidate: TweetCandidate,
-    existingFeatures: FeatureMap
-  ): Stitch[FeatureMap] = {
-    val authorIdOption = existingFeatures.getOrElse(AuthorIdFeature, None)
-
-    val blueVerifiedStitch = authorIdOption
-      .map { authorId =>
-        gizmoduck
-          .getUserById(
-            userId = authorId,
-            queryFields = queryFields
-          )
-          .map { _.safety.flatMap(_.isBlueVerified).getOrElse(false) }
-      }.getOrElse(Stitch.False)
-
-    blueVerifiedStitch.map { isBlueVerified =>
-      FeatureMapBuilder()
-        .add(AuthorIsBlueVerifiedFeature, isBlueVerified)
-        .build()
-    }
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/ImpressionBloomFilterQueryFeatureHydrator.scala

@@ -3,6 +3,7 @@ package com.twitter.home_mixer.functional_component.feature_hydrator
 import com.twitter.conversions.DurationOps._
 import com.twitter.home_mixer.model.HomeFeatures.ImpressionBloomFilterFeature
 import com.twitter.home_mixer.model.request.HasSeenTweetIds
+import com.twitter.home_mixer.param.HomeGlobalParams.ImpressionBloomFilterFalsePositiveRateParam
 import com.twitter.home_mixer.service.HomeMixerAlertConfig
 import com.twitter.product_mixer.core.feature.Feature
 import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
@@ -11,7 +12,8 @@ import com.twitter.product_mixer.core.functional_component.feature_hydrator.Quer
 import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.stitch.Stitch
-import com.twitter.timelines.impressionbloomfilter.{thriftscala => t}
+import com.twitter.timelines.clients.manhattan.store.ManhattanStoreClient
+import com.twitter.timelines.impressionbloomfilter.{thriftscala => blm}
 import com.twitter.timelines.impressionstore.impressionbloomfilter.ImpressionBloomFilter
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -19,32 +21,35 @@ import javax.inject.Singleton
 @Singleton
 case class ImpressionBloomFilterQueryFeatureHydrator[
   Query <: PipelineQuery with HasSeenTweetIds] @Inject() (
-  bloomFilter: ImpressionBloomFilter)
-    extends QueryFeatureHydrator[Query] {
+  bloomFilterClient: ManhattanStoreClient[
+    blm.ImpressionBloomFilterKey,
+    blm.ImpressionBloomFilterSeq
+  ]) extends QueryFeatureHydrator[Query] {
 
   override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier(
     "ImpressionBloomFilter")
 
   private val ImpressionBloomFilterTTL = 7.day
-  private val ImpressionBloomFilterFalsePositiveRate = 0.002
 
   override val features: Set[Feature[_, _]] = Set(ImpressionBloomFilterFeature)
 
-  private val SurfaceArea = t.SurfaceArea.HomeTimeline
+  private val SurfaceArea = blm.SurfaceArea.HomeTimeline
 
   override def hydrate(query: Query): Stitch[FeatureMap] = {
     val userId = query.getRequiredUserId
-    bloomFilter.getBloomFilterSeq(userId, SurfaceArea).map { bloomFilterSeq =>
+    bloomFilterClient
+      .get(blm.ImpressionBloomFilterKey(userId, SurfaceArea))
+      .map(_.getOrElse(blm.ImpressionBloomFilterSeq(Seq.empty)))
+      .map { bloomFilterSeq =>
         val updatedBloomFilterSeq =
           if (query.seenTweetIds.forall(_.isEmpty)) bloomFilterSeq
           else {
-          bloomFilter.addElements(
-            userId = userId,
+            ImpressionBloomFilter.addSeenTweetIds(
               surfaceArea = SurfaceArea,
               tweetIds = query.seenTweetIds.get,
-            bloomFilterEntrySeq = bloomFilterSeq,
+              bloomFilterSeq = bloomFilterSeq,
               timeToLive = ImpressionBloomFilterTTL,
-            falsePositiveRate = ImpressionBloomFilterFalsePositiveRate
+              falsePositiveRate = query.params(ImpressionBloomFilterFalsePositiveRateParam)
             )
           }
         FeatureMapBuilder().add(ImpressionBloomFilterFeature, updatedBloomFilterSeq).build()

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/InNetworkFeatureHydrator.scala

@@ -0,0 +1,41 @@
+package com.twitter.home_mixer.functional_component.feature_hydrator
+
+import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
+import com.twitter.product_mixer.component_library.feature_hydrator.query.social_graph.SGSFollowedUsersFeature
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.feature.Feature
+import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
+import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
+import com.twitter.product_mixer.core.functional_component.feature_hydrator.BulkCandidateFeatureHydrator
+import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
+import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.stitch.Stitch
+
+object InNetworkFeatureHydrator
+    extends BulkCandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
+
+  override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("InNetwork")
+
+  override val features: Set[Feature[_, _]] = Set(InNetworkFeature)
+
+  override def apply(
+    query: PipelineQuery,
+    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
+  ): Stitch[Seq[FeatureMap]] = {
+    val viewerId = query.getRequiredUserId
+    val followedUserIds = query.features.get.get(SGSFollowedUsersFeature).toSet
+
+    val featureMaps = candidates.map { candidate =>
+      // We use authorId and not sourceAuthorId here so that retweets are defined as in network
+      val isInNetworkOpt = candidate.features.getOrElse(AuthorIdFeature, None).map { authorId =>
+        // Users cannot follow themselves but this is in network by definition
+        val isSelfTweet = authorId == viewerId
+        isSelfTweet || followedUserIds.contains(authorId)
+      }
+      FeatureMapBuilder().add(InNetworkFeature, isInNetworkOpt.getOrElse(true)).build()
+    }
+    Stitch.value(featureMaps)
+  }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/PersistenceStoreQueryFeatureHydrator.scala

@@ -2,8 +2,10 @@ package com.twitter.home_mixer.functional_component.feature_hydrator
 
 import com.twitter.conversions.DurationOps._
 import com.twitter.common_internal.analytics.twitter_client_user_agent_parser.UserAgent
+import com.twitter.finagle.stats.StatsReceiver
 import com.twitter.home_mixer.model.HomeFeatures.PersistenceEntriesFeature
 import com.twitter.home_mixer.model.HomeFeatures.ServedTweetIdsFeature
+import com.twitter.home_mixer.model.HomeFeatures.ServedTweetPreviewIdsFeature
 import com.twitter.home_mixer.model.HomeFeatures.WhoToFollowExcludedUserIdsFeature
 import com.twitter.home_mixer.model.request.FollowingProduct
 import com.twitter.home_mixer.model.request.ForYouProduct
@@ -27,17 +29,27 @@ import javax.inject.Singleton
 
 @Singleton
 case class PersistenceStoreQueryFeatureHydrator @Inject() (
-  timelineResponseBatchesClient: TimelineResponseBatchesClient[TimelineResponseV3])
+  timelineResponseBatchesClient: TimelineResponseBatchesClient[TimelineResponseV3],
+  statsReceiver: StatsReceiver)
     extends QueryFeatureHydrator[PipelineQuery] {
 
   override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("PersistenceStore")
 
+  private val scopedStatsReceiver = statsReceiver.scope(getClass.getSimpleName)
+  private val servedTweetIdsSizeStat = scopedStatsReceiver.stat("ServedTweetIdsSize")
+
   private val WhoToFollowExcludedUserIdsLimit = 1000
-  private val ServedTweetIdsDuration = 1.hour
+  private val ServedTweetIdsDuration = 10.minutes
   private val ServedTweetIdsLimit = 100
+  private val ServedTweetPreviewIdsDuration = 10.hours
+  private val ServedTweetPreviewIdsLimit = 10
 
   override val features: Set[Feature[_, _]] =
-    Set(ServedTweetIdsFeature, PersistenceEntriesFeature, WhoToFollowExcludedUserIdsFeature)
+    Set(
+      ServedTweetIdsFeature,
+      ServedTweetPreviewIdsFeature,
+      PersistenceEntriesFeature,
+      WhoToFollowExcludedUserIdsFeature)
 
   private val supportedClients = Seq(
     ClientPlatform.IPhone,
@@ -80,8 +92,19 @@ case class PersistenceStoreQueryFeatureHydrator @Inject() (
             .flatMap(
               _.entries.flatMap(_.tweetIds(includeSourceTweets = true)).take(ServedTweetIdsLimit))
 
+          servedTweetIdsSizeStat.add(servedTweetIds.size)
+
+          val servedTweetPreviewIds = timelineResponses
+            .filter(_.clientPlatform == clientPlatform)
+            .filter(_.servedTime >= Time.now - ServedTweetPreviewIdsDuration)
+            .sortBy(-_.servedTime.inMilliseconds)
+            .flatMap(_.entries
+              .filter(_.entityIdType == EntityIdType.TweetPreview)
+              .flatMap(_.tweetIds(includeSourceTweets = true)).take(ServedTweetPreviewIdsLimit))
+
           FeatureMapBuilder()
             .add(ServedTweetIdsFeature, servedTweetIds)
+            .add(ServedTweetPreviewIdsFeature, servedTweetPreviewIds)
             .add(PersistenceEntriesFeature, timelineResponses)
             .add(WhoToFollowExcludedUserIdsFeature, whoToFollowUserIds)
             .build()

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/PerspectiveFilteredSocialContextFeatureHydrator.scala

@@ -10,6 +10,7 @@ import com.twitter.product_mixer.core.functional_component.feature_hydrator.Bulk
 import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
 import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.product_mixer.core.util.OffloadFuturePools
 import com.twitter.stitch.Stitch
 import com.twitter.stitch.timelineservice.TimelineService
 import com.twitter.stitch.timelineservice.TimelineService.GetPerspectives
@@ -37,10 +38,10 @@ class PerspectiveFilteredSocialContextFeatureHydrator @Inject() (timelineService
   override def apply(
     query: PipelineQuery,
     candidates: Seq[CandidateWithFeatures[TweetCandidate]]
-  ): Stitch[Seq[FeatureMap]] = {
+  ): Stitch[Seq[FeatureMap]] = OffloadFuturePools.offloadStitch {
     val engagingUserIdtoTweetId = candidates.flatMap { candidate =>
       candidate.features
-        .get(FavoritedByUserIdsFeature).take(MaxCountUsers)
+        .getOrElse(FavoritedByUserIdsFeature, Seq.empty).take(MaxCountUsers)
         .map(favoritedBy => favoritedBy -> candidate.candidate.id)
     }
 
@@ -59,7 +60,7 @@ class PerspectiveFilteredSocialContextFeatureHydrator @Inject() (timelineService
 
       candidates.map { candidate =>
         val perspectiveFilteredFavoritedByUserIds: Seq[Long] = candidate.features
-          .get(FavoritedByUserIdsFeature).take(MaxCountUsers)
+          .getOrElse(FavoritedByUserIdsFeature, Seq.empty).take(MaxCountUsers)
           .filter { userId => validUserIdTweetIds.contains((userId, candidate.candidate.id)) }
 
         FeatureMapBuilder()

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/RealGraphInNetworkScoresQueryFeatureHydrator.scala

@@ -32,11 +32,15 @@ case class RealGraphInNetworkScoresQueryFeatureHydrator @Inject() (
       val realGraphScoresFeatures = realGraphFollowedUsers
         .getOrElse(Seq.empty)
         .sortBy(-_.score)
-        .map(candidate => candidate.userId -> candidate.score)
+        .map(candidate => candidate.userId -> scaleScore(candidate.score))
         .take(RealGraphCandidateCount)
         .toMap
 
       FeatureMapBuilder().add(RealGraphInNetworkScoresFeature, realGraphScoresFeatures).build()
     }
   }
+
+  // Rescale Real Graph v2 scores from [0,1] to the v1 scores distribution [1,2.97]
+  private def scaleScore(score: Double): Double =
+    if (score >= 0.0 && score <= 1.0) score * 1.97 + 1.0 else score
 }

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/RequestQueryFeatureHydrator.scala

@@ -17,9 +17,13 @@ import com.twitter.product_mixer.core.model.marshalling.response.urt.operation.G
 import com.twitter.product_mixer.core.model.marshalling.response.urt.operation.TopCursor
 import com.twitter.product_mixer.core.pipeline.HasPipelineCursor
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.product_mixer.core.pipeline.pipeline_failure.BadRequest
+import com.twitter.product_mixer.core.pipeline.pipeline_failure.PipelineFailure
 import com.twitter.search.common.util.lang.ThriftLanguageUtil
 import com.twitter.snowflake.id.SnowflakeId
 import com.twitter.stitch.Stitch
+import com.twitter.timelines.prediction.adapters.request_context.RequestContextAdapter.dowFromTimestamp
+import com.twitter.timelines.prediction.adapters.request_context.RequestContextAdapter.hourFromTimestamp
 import java.util.UUID
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -45,6 +49,9 @@ class RequestQueryFeatureHydrator[
     PullToRefreshFeature,
     RequestJoinIdFeature,
     ServedRequestIdFeature,
+    TimestampFeature,
+    TimestampGMTDowFeature,
+    TimestampGMTHourFeature,
     ViewerIdFeature
   )
 
@@ -67,6 +74,7 @@ class RequestQueryFeatureHydrator[
   override def hydrate(query: Query): Stitch[FeatureMap] = {
     val requestContext = query.deviceContext.flatMap(_.requestContextValue)
     val servedRequestId = UUID.randomUUID.getMostSignificantBits
+    val timestamp = query.queryTime.inMilliseconds
 
     val featureMap = FeatureMapBuilder()
       .add(AccountAgeFeature, query.getOptionalUserId.flatMap(SnowflakeId.timeFromIdOpt))
@@ -97,8 +105,15 @@ class RequestQueryFeatureHydrator[
       .add(PullToRefreshFeature, requestContext.contains(RequestContext.PullToRefresh))
       .add(ServedRequestIdFeature, Some(servedRequestId))
       .add(RequestJoinIdFeature, getRequestJoinId(servedRequestId))
+      .add(TimestampFeature, timestamp)
+      .add(TimestampGMTDowFeature, dowFromTimestamp(timestamp))
+      .add(TimestampGMTHourFeature, hourFromTimestamp(timestamp))
       .add(HasDarkRequestFeature, hasDarkRequest)
-      .add(ViewerIdFeature, query.getRequiredUserId)
+      .add(
+        ViewerIdFeature,
+        query.getOptionalUserId
+          .orElse(query.getGuestId).getOrElse(
+            throw PipelineFailure(BadRequest, "Missing viewer id")))
       .build()
 
     Stitch.value(featureMap)

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/SGSFollowedUsersQueryFeatureHydrator.scala

@@ -1,46 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.socialgraph.{thriftscala => sg}
-import com.twitter.stitch.Stitch
-import com.twitter.stitch.socialgraph.{SocialGraph => SocialGraphStitchClient}
-import javax.inject.Inject
-import javax.inject.Singleton
-
-object SGSFollowedUsersFeature extends Feature[PipelineQuery, Seq[Long]]
-
-@Singleton
-case class SGSFollowedUsersQueryFeatureHydrator @Inject() (
-  socialGraphStitchClient: SocialGraphStitchClient)
-    extends QueryFeatureHydrator[PipelineQuery] {
-
-  override val identifier: FeatureHydratorIdentifier =
-    FeatureHydratorIdentifier("SGSFollowedUsers")
-
-  override val features: Set[Feature[_, _]] = Set(SGSFollowedUsersFeature)
-
-  private val SocialGraphLimit = 14999
-
-  override def hydrate(query: PipelineQuery): Stitch[FeatureMap] = {
-    val userId = query.getRequiredUserId
-
-    val request = sg.IdsRequest(
-      relationships = Seq(
-        sg.SrcRelationship(userId, sg.RelationshipType.Following, hasRelationship = true),
-        sg.SrcRelationship(userId, sg.RelationshipType.Muting, hasRelationship = false)
-      ),
-      pageRequest = Some(sg.PageRequest(count = Some(SocialGraphLimit)))
-    )
-
-    socialGraphStitchClient
-      .ids(request).map(_.ids)
-      .map { followedUsers =>
-        FeatureMapBuilder().add(SGSFollowedUsersFeature, followedUsers).build()
-      }
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/SGSValidSocialContextFeatureHydrator.scala

@@ -12,6 +12,7 @@ import com.twitter.product_mixer.core.functional_component.feature_hydrator.Bulk
 import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
 import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.product_mixer.core.util.OffloadFuturePools
 import com.twitter.socialgraph.{thriftscala => sg}
 import com.twitter.stitch.Stitch
 import com.twitter.stitch.socialgraph.SocialGraph
@@ -41,8 +42,7 @@ class SGSValidSocialContextFeatureHydrator @Inject() (
   override def apply(
     query: PipelineQuery,
     candidates: Seq[CandidateWithFeatures[TweetCandidate]]
-  ): Stitch[Seq[FeatureMap]] = {
-
+  ): Stitch[Seq[FeatureMap]] = OffloadFuturePools.offloadStitch {
     val allSocialContextUserIds =
       candidates.flatMap { candidate =>
         candidate.features.getOrElse(FavoritedByUserIdsFeature, Nil).take(MaxCountUsers) ++

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/SocialGraphServiceFeatureHydrator.scala

@@ -1,67 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
-import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
-import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.BulkCandidateFeatureHydrator
-import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.socialgraph.{thriftscala => sg}
-import com.twitter.stitch.Stitch
-import com.twitter.stitch.socialgraph.{SocialGraph => SocialGraphStitchClient}
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class SocialGraphServiceFeatureHydrator @Inject() (socialGraphStitchClient: SocialGraphStitchClient)
-    extends BulkCandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
-
-  override val identifier: FeatureHydratorIdentifier =
-    FeatureHydratorIdentifier("SocialGraphService")
-
-  override val features: Set[Feature[_, _]] = Set(InNetworkFeature)
-
-  override def apply(
-    query: PipelineQuery,
-    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
-  ): Stitch[Seq[FeatureMap]] = {
-    val viewerId = query.getRequiredUserId
-
-    // We use authorId and not sourceAuthorId here so that retweets are defined as in network
-    val authorIds = candidates.map(_.features.getOrElse(AuthorIdFeature, None).getOrElse(0L))
-    val distinctNonSelfAuthorIds = authorIds.filter(_ != viewerId).distinct
-
-    val idsRequest = createIdsRequest(
-      userId = viewerId,
-      relationshipTypes = Set(sg.RelationshipType.Following),
-      targetIds = Some(distinctNonSelfAuthorIds)
-    )
-
-    socialGraphStitchClient
-      .ids(request = idsRequest, requestContext = None)
-      .map { idResult =>
-        authorIds.map { authorId =>
-          // Users cannot follow themselves but this is in network by definition
-          val isSelfTweet = authorId == viewerId
-          val inNetworkAuthorIds = idResult.ids.toSet
-          val isInNetwork = isSelfTweet || inNetworkAuthorIds.contains(authorId) || authorId == 0L
-          FeatureMapBuilder().add(InNetworkFeature, isInNetwork).build()
-        }
-      }
-  }
-
-  private def createIdsRequest(
-    userId: Long,
-    relationshipTypes: Set[sg.RelationshipType],
-    targetIds: Option[Seq[Long]] = None
-  ): sg.IdsRequest = sg.IdsRequest(
-    relationshipTypes.map { relationshipType =>
-      sg.SrcRelationship(userId, relationshipType, targets = targetIds)
-    }.toSeq,
-    Some(sg.PageRequest(selectAll = Some(true)))
-  )
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/TSPInferredTopicFeatureHydrator.scala

@@ -1,162 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.contentrecommender.{thriftscala => cr}
-import com.twitter.finagle.stats.StatsReceiver
-import com.twitter.home_mixer.functional_component.feature_hydrator.adapters.inferred_topic.InferredTopicAdapter
-import com.twitter.home_mixer.model.HomeFeatures.CandidateSourceIdFeature
-import com.twitter.home_mixer.model.HomeFeatures.TSPMetricTagFeature
-import com.twitter.home_mixer.model.HomeFeatures.TopicContextFunctionalityTypeFeature
-import com.twitter.home_mixer.model.HomeFeatures.TopicIdSocialContextFeature
-import com.twitter.ml.api.DataRecord
-import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.FeatureWithDefaultOnFailure
-import com.twitter.product_mixer.core.feature.datarecord.DataRecordInAFeature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.BulkCandidateFeatureHydrator
-import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.BasicTopicContextFunctionalityType
-import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.RecommendationTopicContextFunctionalityType
-import com.twitter.product_mixer.core.model.marshalling.response.urt.metadata.TopicContextFunctionalityType
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.stitch.Stitch
-import com.twitter.strato.generated.client.topic_signals.tsp.TopicSocialProofClientColumn
-import com.twitter.timelineservice.suggests.logging.candidate_tweet_source_id.{thriftscala => sid}
-import com.twitter.topiclisting.TopicListingViewerContext
-import com.twitter.tsp.{thriftscala => tsp}
-
-import javax.inject.Inject
-import javax.inject.Singleton
-import scala.collection.JavaConverters._
-
-object TSPInferredTopicFeature extends Feature[TweetCandidate, Map[Long, Double]]
-object TSPInferredTopicDataRecordFeature
-    extends DataRecordInAFeature[TweetCandidate]
-    with FeatureWithDefaultOnFailure[TweetCandidate, DataRecord] {
-  override def defaultValue: DataRecord = new DataRecord()
-}
-
-@Singleton
-class TSPInferredTopicFeatureHydrator @Inject() (
-  topicSocialProofClientColumn: TopicSocialProofClientColumn,
-  statsReceiver: StatsReceiver,
-) extends BulkCandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
-
-  override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("TSPInferredTopic")
-
-  override val features: Set[Feature[_, _]] =
-    Set(
-      TSPInferredTopicFeature,
-      TSPInferredTopicDataRecordFeature,
-      TopicIdSocialContextFeature,
-      TopicContextFunctionalityTypeFeature)
-
-  private val topK = 3
-
-  private val sourcesToSetSocialProof: Set[sid.CandidateTweetSourceId] = Set(
-    sid.CandidateTweetSourceId.Simcluster,
-    sid.CandidateTweetSourceId.CroonTweet
-  )
-
-  private val scopedStatsReceiver = statsReceiver.scope(getClass.getSimpleName)
-  private val keyFoundCounter = scopedStatsReceiver.counter("key/found")
-  private val keyLossCounter = scopedStatsReceiver.counter("key/loss")
-  private val requestFailCounter = scopedStatsReceiver.counter("request/fail")
-
-  private val DefaultFeatureMap = FeatureMapBuilder()
-    .add(TSPInferredTopicFeature, Map.empty[Long, Double])
-    .add(TSPInferredTopicDataRecordFeature, new DataRecord())
-    .add(TopicIdSocialContextFeature, None)
-    .add(TopicContextFunctionalityTypeFeature, None)
-    .build()
-
-  override def apply(
-    query: PipelineQuery,
-    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
-  ): Stitch[Seq[FeatureMap]] = {
-    val tags = candidates.collect {
-      case candidate if candidate.features.getTry(TSPMetricTagFeature).isReturn =>
-        candidate.candidate.id -> candidate.features
-          .getOrElse(TSPMetricTagFeature, Set.empty[tsp.MetricTag])
-    }.toMap
-
-    val topicSocialProofRequest =
-      tsp.TopicSocialProofRequest(
-        userId = query.getRequiredUserId,
-        tweetIds = candidates.map(_.candidate.id).toSet,
-        displayLocation = cr.DisplayLocation.HomeTimeline,
-        topicListingSetting = tsp.TopicListingSetting.Followable,
-        context = TopicListingViewerContext.fromClientContext(query.clientContext).toThrift,
-        bypassModes = None,
-        // Only CRMixer source has this data. Convert the CRMixer metric tag to tsp metric tag.
-        tags = if (tags.isEmpty) None else Some(tags)
-      )
-
-    topicSocialProofClientColumn.fetcher
-      .fetch(topicSocialProofRequest)
-      .map(_.v)
-      .map {
-        case Some(response) =>
-          candidates.map { candidate =>
-            val topicWithScores = response.socialProofs.getOrElse(candidate.candidate.id, Seq.empty)
-            if (topicWithScores.nonEmpty) {
-              keyFoundCounter.incr()
-              val (socialProofId, socialProofFunctionalityType) =
-                if (candidate.features
-                    .getOrElse(CandidateSourceIdFeature, None)
-                    .exists(sourcesToSetSocialProof.contains)) {
-                  getSocialProof(topicWithScores)
-                } else {
-                  (None, None)
-                }
-              val inferredTopicFeatures = convertTopicWithScores(topicWithScores)
-              val inferredTopicDataRecord =
-                InferredTopicAdapter.adaptToDataRecords(inferredTopicFeatures).asScala.head
-              FeatureMapBuilder()
-                .add(TSPInferredTopicFeature, inferredTopicFeatures)
-                .add(TSPInferredTopicDataRecordFeature, inferredTopicDataRecord)
-                .add(TopicIdSocialContextFeature, socialProofId)
-                .add(TopicContextFunctionalityTypeFeature, socialProofFunctionalityType)
-                .build()
-            } else {
-              keyLossCounter.incr()
-              DefaultFeatureMap
-            }
-          }
-        case _ =>
-          requestFailCounter.incr()
-          candidates.map { _ =>
-            DefaultFeatureMap
-          }
-      }
-  }
-
-  private def getSocialProof(
-    topicWithScores: Seq[tsp.TopicWithScore]
-  ): (Option[Long], Option[TopicContextFunctionalityType]) = {
-    val followingTopicId = topicWithScores
-      .collectFirst {
-        case tsp.TopicWithScore(topicId, _, _, Some(tsp.TopicFollowType.Following)) =>
-          topicId
-      }
-    if (followingTopicId.nonEmpty) {
-      return (followingTopicId, Some(BasicTopicContextFunctionalityType))
-    }
-    val implicitFollowingId = topicWithScores.collectFirst {
-      case tsp.TopicWithScore(topicId, _, _, Some(tsp.TopicFollowType.ImplicitFollow)) =>
-        topicId
-    }
-    if (implicitFollowingId.nonEmpty) {
-      return (implicitFollowingId, Some(RecommendationTopicContextFunctionalityType))
-    }
-    (None, None)
-  }
-
-  private def convertTopicWithScores(
-    topicWithScores: Seq[tsp.TopicWithScore],
-  ): Map[Long, Double] = {
-    topicWithScores.sortBy(-_.score).take(topK).map(a => (a.topicId, a.score)).toMap
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/TimeFeaturesHydrator.scala

@@ -1,251 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator
-
-import com.twitter.conversions.DurationOps._
-import com.twitter.home_mixer.model.HomeFeatures.EarlybirdFeature
-import com.twitter.home_mixer.model.HomeFeatures.NonPollingTimesFeature
-import com.twitter.home_mixer.model.HomeFeatures.SourceTweetIdFeature
-import com.twitter.ml.api.DataRecord
-import com.twitter.ml.api.RichDataRecord
-import com.twitter.ml.api.util.FDsl._
-import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.feature.FeatureWithDefaultOnFailure
-import com.twitter.product_mixer.core.feature.datarecord.DataRecordInAFeature
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
-import com.twitter.product_mixer.core.functional_component.feature_hydrator.CandidateFeatureHydrator
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.search.common.features.{thriftscala => sc}
-import com.twitter.snowflake.id.SnowflakeId
-import com.twitter.stitch.Stitch
-import com.twitter.timelines.prediction.features.time_features.AccountAgeInterval
-import com.twitter.timelines.prediction.features.time_features.TimeDataRecordFeatures._
-import com.twitter.timelines.prediction.features.time_features.TimeFeatures
-import com.twitter.util.Duration
-import scala.collection.Searching._
-
-object TimeFeaturesDataRecordFeature
-    extends DataRecordInAFeature[TweetCandidate]
-    with FeatureWithDefaultOnFailure[TweetCandidate, DataRecord] {
-  override def defaultValue: DataRecord = new DataRecord()
-}
-
-object TimeFeaturesHydrator extends CandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
-
-  override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("TimeFeatures")
-
-  override val features: Set[Feature[_, _]] = Set(TimeFeaturesDataRecordFeature)
-
-  override def apply(
-    query: PipelineQuery,
-    candidate: TweetCandidate,
-    existingFeatures: FeatureMap
-  ): Stitch[FeatureMap] = {
-    Stitch.value {
-      val richDataRecord = new RichDataRecord()
-      setTimeFeatures(richDataRecord, candidate, existingFeatures, query)
-      FeatureMapBuilder()
-        .add(TimeFeaturesDataRecordFeature, richDataRecord.getRecord)
-        .build()
-    }
-  }
-
-  private def setTimeFeatures(
-    richDataRecord: RichDataRecord,
-    candidate: TweetCandidate,
-    existingFeatures: FeatureMap,
-    query: PipelineQuery,
-  ): Unit = {
-    val timeFeaturesOpt = getTimeFeatures(query, candidate, existingFeatures)
-    timeFeaturesOpt.foreach(timeFeatures => setFeatures(timeFeatures, richDataRecord))
-  }
-
-  private[feature_hydrator] def getTimeFeatures(
-    query: PipelineQuery,
-    candidate: TweetCandidate,
-    existingFeatures: FeatureMap,
-  ): Option[TimeFeatures] = {
-    for {
-      requestTimestampMs <- Some(query.queryTime.inMilliseconds)
-      tweetId <- Some(candidate.id)
-      viewerId <- query.getOptionalUserId
-      tweetCreationTimeMs <- timeFromTweetOrUserId(tweetId)
-      timeSinceTweetCreation = requestTimestampMs - tweetCreationTimeMs
-      accountAgeDurationOpt = timeFromTweetOrUserId(viewerId).map { viewerAccountCreationTimeMs =>
-        Duration.fromMilliseconds(requestTimestampMs - viewerAccountCreationTimeMs)
-      }
-      timeSinceSourceTweetCreation =
-        existingFeatures
-          .getOrElse(SourceTweetIdFeature, None)
-          .flatMap { sourceTweetId =>
-            timeFromTweetOrUserId(sourceTweetId).map { sourceTweetCreationTimeMs =>
-              requestTimestampMs - sourceTweetCreationTimeMs
-            }
-          }
-          .getOrElse(timeSinceTweetCreation)
-      if (timeSinceTweetCreation > 0 && timeSinceSourceTweetCreation > 0)
-    } yield {
-      val timeFeatures = TimeFeatures(
-        timeSinceTweetCreation = timeSinceTweetCreation,
-        timeSinceSourceTweetCreation = timeSinceSourceTweetCreation,
-        timeSinceViewerAccountCreationSecs = accountAgeDurationOpt.map(_.inSeconds),
-        isDay30NewUser = accountAgeDurationOpt.map(_ < 30.days).getOrElse(false),
-        isMonth12NewUser = accountAgeDurationOpt.map(_ < 365.days).getOrElse(false),
-        accountAgeInterval = accountAgeDurationOpt.flatMap(AccountAgeInterval.fromDuration),
-        isTweetRecycled = false // only set in RecyclableTweetCandidateFilter, but it's not used
-      )
-
-      val timeFeaturesWithLastEngagement = addLastEngagementTimeFeatures(
-        existingFeatures.getOrElse(EarlybirdFeature, None),
-        timeFeatures,
-        timeSinceSourceTweetCreation
-      ).getOrElse(timeFeatures)
-
-      val nonPollingTimestampsMs =
-        query.features.map(_.getOrElse(NonPollingTimesFeature, Seq.empty))
-      val timeFeaturesWithNonPollingOpt = addNonPollingTimeFeatures(
-        timeFeaturesWithLastEngagement,
-        requestTimestampMs,
-        tweetCreationTimeMs,
-        nonPollingTimestampsMs
-      )
-      timeFeaturesWithNonPollingOpt.getOrElse(timeFeaturesWithLastEngagement)
-    }
-  }
-
-  private def timeFromTweetOrUserId(tweetOrUserId: Long): Option[Long] = {
-    if (SnowflakeId.isSnowflakeId(tweetOrUserId))
-      Some(SnowflakeId(tweetOrUserId).time.inMilliseconds)
-    else None
-  }
-
-  private def addLastEngagementTimeFeatures(
-    tweetFeaturesOpt: Option[sc.ThriftTweetFeatures],
-    timeFeatures: TimeFeatures,
-    timeSinceSourceTweetCreation: Long
-  ): Option[TimeFeatures] = {
-    tweetFeaturesOpt.map { tweetFeatures =>
-      val lastFavSinceCreationHrs = tweetFeatures.lastFavSinceCreationHrs.map(_.toDouble)
-      val lastRetweetSinceCreationHrs = tweetFeatures.lastRetweetSinceCreationHrs.map(_.toDouble)
-      val lastReplySinceCreationHrs = tweetFeatures.lastReplySinceCreationHrs.map(_.toDouble)
-      val lastQuoteSinceCreationHrs = tweetFeatures.lastQuoteSinceCreationHrs.map(_.toDouble)
-
-      timeFeatures.copy(
-        lastFavSinceCreationHrs = lastFavSinceCreationHrs,
-        lastRetweetSinceCreationHrs = lastRetweetSinceCreationHrs,
-        lastReplySinceCreationHrs = lastReplySinceCreationHrs,
-        lastQuoteSinceCreationHrs = lastQuoteSinceCreationHrs,
-        timeSinceLastFavoriteHrs = getTimeSinceLastEngagementHrs(
-          lastFavSinceCreationHrs,
-          timeSinceSourceTweetCreation
-        ),
-        timeSinceLastRetweetHrs = getTimeSinceLastEngagementHrs(
-          lastRetweetSinceCreationHrs,
-          timeSinceSourceTweetCreation
-        ),
-        timeSinceLastReplyHrs = getTimeSinceLastEngagementHrs(
-          lastReplySinceCreationHrs,
-          timeSinceSourceTweetCreation
-        ),
-        timeSinceLastQuoteHrs = getTimeSinceLastEngagementHrs(
-          lastQuoteSinceCreationHrs,
-          timeSinceSourceTweetCreation
-        )
-      )
-    }
-  }
-
-  private def addNonPollingTimeFeatures(
-    timeFeatures: TimeFeatures,
-    requestTimestampMs: Long,
-    creationTimeMs: Long,
-    nonPollingTimestampsMs: Option[Seq[Long]]
-  ): Option[TimeFeatures] = {
-    for {
-      nonPollingTimestampsMs <- nonPollingTimestampsMs
-      lastNonPollingTimestampMs <- nonPollingTimestampsMs.headOption
-      earliestNonPollingTimestampMs <- nonPollingTimestampsMs.lastOption
-    } yield {
-      val timeSinceLastNonPollingRequest = requestTimestampMs - lastNonPollingTimestampMs
-      val tweetAgeRatio = timeSinceLastNonPollingRequest / math.max(
-        1.0,
-        timeFeatures.timeSinceTweetCreation
-      )
-      /*
-       * Non-polling timestamps are stored in chronological order.
-       * The latest timestamps occur first, therefore we need to explicitly search in reverse order.
-       */
-      val nonPollingRequestsSinceTweetCreation =
-        if (nonPollingTimestampsMs.nonEmpty) {
-          nonPollingTimestampsMs.search(creationTimeMs)(Ordering[Long].reverse).insertionPoint
-        } else {
-          0
-        }
-      /*
-       * Calculate the average time between non-polling requests; include
-       * request time in this calculation as latest timestamp.
-       */
-      val timeBetweenNonPollingRequestsAvg =
-        (requestTimestampMs - earliestNonPollingTimestampMs) / math
-          .max(1.0, nonPollingTimestampsMs.size)
-      val timeFeaturesWithNonPolling = timeFeatures.copy(
-        timeBetweenNonPollingRequestsAvg = Some(timeBetweenNonPollingRequestsAvg),
-        timeSinceLastNonPollingRequest = Some(timeSinceLastNonPollingRequest),
-        nonPollingRequestsSinceTweetCreation = Some(nonPollingRequestsSinceTweetCreation),
-        tweetAgeRatio = Some(tweetAgeRatio)
-      )
-      timeFeaturesWithNonPolling
-    }
-  }
-
-  private[this] def getTimeSinceLastEngagementHrs(
-    lastEngagementTimeSinceCreationHrsOpt: Option[Double],
-    timeSinceTweetCreation: Long
-  ): Option[Double] = {
-    lastEngagementTimeSinceCreationHrsOpt.map { lastEngagementTimeSinceCreationHrs =>
-      val timeSinceTweetCreationHrs = (timeSinceTweetCreation / (60 * 60 * 1000)).toInt
-      timeSinceTweetCreationHrs - lastEngagementTimeSinceCreationHrs
-    }
-  }
-
-  private def setFeatures(features: TimeFeatures, richDataRecord: RichDataRecord): Unit = {
-    val record = richDataRecord.getRecord
-      .setFeatureValue(IS_TWEET_RECYCLED, features.isTweetRecycled)
-      .setFeatureValue(TIME_SINCE_TWEET_CREATION, features.timeSinceTweetCreation)
-      .setFeatureValueFromOption(
-        TIME_SINCE_VIEWER_ACCOUNT_CREATION_SECS,
-        features.timeSinceViewerAccountCreationSecs)
-      .setFeatureValue(
-        USER_ID_IS_SNOWFLAKE_ID,
-        features.timeSinceViewerAccountCreationSecs.isDefined
-      )
-      .setFeatureValueFromOption(ACCOUNT_AGE_INTERVAL, features.accountAgeInterval.map(_.id.toLong))
-      .setFeatureValue(IS_30_DAY_NEW_USER, features.isDay30NewUser)
-      .setFeatureValue(IS_12_MONTH_NEW_USER, features.isMonth12NewUser)
-      .setFeatureValueFromOption(LAST_FAVORITE_SINCE_CREATION_HRS, features.lastFavSinceCreationHrs)
-      .setFeatureValueFromOption(
-        LAST_RETWEET_SINCE_CREATION_HRS,
-        features.lastRetweetSinceCreationHrs
-      )
-      .setFeatureValueFromOption(LAST_REPLY_SINCE_CREATION_HRS, features.lastReplySinceCreationHrs)
-      .setFeatureValueFromOption(LAST_QUOTE_SINCE_CREATION_HRS, features.lastQuoteSinceCreationHrs)
-      .setFeatureValueFromOption(TIME_SINCE_LAST_FAVORITE_HRS, features.timeSinceLastFavoriteHrs)
-      .setFeatureValueFromOption(TIME_SINCE_LAST_RETWEET_HRS, features.timeSinceLastRetweetHrs)
-      .setFeatureValueFromOption(TIME_SINCE_LAST_REPLY_HRS, features.timeSinceLastReplyHrs)
-      .setFeatureValueFromOption(TIME_SINCE_LAST_QUOTE_HRS, features.timeSinceLastQuoteHrs)
-    /*
-     * set features whose values are optional as some users do not have non-polling timestamps
-     */
-    features.timeBetweenNonPollingRequestsAvg.foreach(
-      record.setFeatureValue(TIME_BETWEEN_NON_POLLING_REQUESTS_AVG, _)
-    )
-    features.timeSinceLastNonPollingRequest.foreach(
-      record.setFeatureValue(TIME_SINCE_LAST_NON_POLLING_REQUEST, _)
-    )
-    features.nonPollingRequestsSinceTweetCreation.foreach(
-      record.setFeatureValue(NON_POLLING_REQUESTS_SINCE_TWEET_CREATION, _)
-    )
-    features.tweetAgeRatio.foreach(record.setFeatureValue(TWEET_AGE_RATIO, _))
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/TweetImpressionsQueryFeatureHydrator.scala

@@ -24,8 +24,8 @@ case class TweetImpressionsQueryFeatureHydrator[
   manhattanTweetImpressionStoreClient: ManhattanTweetImpressionStoreClient)
     extends QueryFeatureHydrator[Query] {
 
-  private val TweetImpressionTTL = 1.day
-  private val TweetImpressionCap = 3000
+  private val TweetImpressionTTL = 2.days
+  private val TweetImpressionCap = 5000
 
   override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("TweetImpressions")
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/TweetypieFeatureHydrator.scala

@@ -1,6 +1,9 @@
 package com.twitter.home_mixer.functional_component.feature_hydrator
 
+import com.twitter.finagle.stats.StatsReceiver
 import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.ExclusiveConversationAuthorIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
 import com.twitter.home_mixer.model.HomeFeatures.InReplyToTweetIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsHydratedFeature
 import com.twitter.home_mixer.model.HomeFeatures.IsNsfwFeature
@@ -10,11 +13,13 @@ import com.twitter.home_mixer.model.HomeFeatures.QuotedTweetIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.QuotedUserIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.SourceTweetIdFeature
 import com.twitter.home_mixer.model.HomeFeatures.SourceUserIdFeature
+import com.twitter.home_mixer.model.HomeFeatures.TweetLanguageFeature
 import com.twitter.home_mixer.model.HomeFeatures.TweetTextFeature
 import com.twitter.home_mixer.model.request.FollowingProduct
 import com.twitter.home_mixer.model.request.ForYouProduct
 import com.twitter.home_mixer.model.request.ListTweetsProduct
 import com.twitter.home_mixer.model.request.ScoredTweetsProduct
+import com.twitter.home_mixer.model.request.SubscribedProduct
 import com.twitter.home_mixer.util.tweetypie.RequestFields
 import com.twitter.product_mixer.component_library.feature_hydrator.candidate.tweet_is_nsfw.IsNsfw
 import com.twitter.product_mixer.component_library.feature_hydrator.candidate.tweet_visibility_reason.VisibilityReason
@@ -29,17 +34,22 @@ import com.twitter.spam.rtf.{thriftscala => rtf}
 import com.twitter.stitch.Stitch
 import com.twitter.stitch.tweetypie.{TweetyPie => TweetypieStitchClient}
 import com.twitter.tweetypie.{thriftscala => tp}
+import com.twitter.util.logging.Logging
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitchClient)
-    extends CandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
+class TweetypieFeatureHydrator @Inject() (
+  tweetypieStitchClient: TweetypieStitchClient,
+  statsReceiver: StatsReceiver)
+    extends CandidateFeatureHydrator[PipelineQuery, TweetCandidate]
+    with Logging {
 
   override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("Tweetypie")
 
   override val features: Set[Feature[_, _]] = Set(
     AuthorIdFeature,
+    ExclusiveConversationAuthorIdFeature,
     InReplyToTweetIdFeature,
     IsHydratedFeature,
     IsNsfw,
@@ -51,6 +61,7 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
     SourceTweetIdFeature,
     SourceUserIdFeature,
     TweetTextFeature,
+    TweetLanguageFeature,
     VisibilityReason
   )
 
@@ -70,9 +81,12 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
   ): Stitch[FeatureMap] = {
     val safetyLevel = query.product match {
       case FollowingProduct => rtf.SafetyLevel.TimelineHomeLatest
-      case ForYouProduct => rtf.SafetyLevel.TimelineHome
+      case ForYouProduct =>
+        val inNetwork = existingFeatures.getOrElse(InNetworkFeature, true)
+        if (inNetwork) rtf.SafetyLevel.TimelineHome else rtf.SafetyLevel.TimelineHomeRecommendations
       case ScoredTweetsProduct => rtf.SafetyLevel.TimelineHome
       case ListTweetsProduct => rtf.SafetyLevel.TimelineLists
+      case SubscribedProduct => rtf.SafetyLevel.TimelineHomeSubscribed
       case unknown => throw new UnsupportedOperationException(s"Unknown product: $unknown")
     }
 
@@ -82,9 +96,12 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
       includeQuotedTweet = true,
       visibilityPolicy = tp.TweetVisibilityPolicy.UserVisible,
       safetyLevel = Some(safetyLevel),
-      forUserId = Some(query.getRequiredUserId)
+      forUserId = query.getOptionalUserId
     )
 
+    val exclusiveAuthorIdOpt =
+      existingFeatures.getOrElse(ExclusiveConversationAuthorIdFeature, None)
+
     tweetypieStitchClient.getTweetFields(tweetId = candidate.id, options = tweetFieldsOptions).map {
       case tp.GetTweetFieldsResult(_, tp.TweetFieldsResultState.Found(found), quoteOpt, _) =>
         val coreData = found.tweet.coreData
@@ -106,6 +123,7 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
           found.retweetedTweet.exists(_.coreData.exists(data => data.nsfwAdmin || data.nsfwUser))
 
         val tweetText = coreData.map(_.text)
+        val tweetLanguage = found.tweet.language.map(_.language)
 
         val tweetAuthorId = coreData.map(_.userId)
         val inReplyToTweetId = coreData.flatMap(_.reply.flatMap(_.inReplyToStatusId))
@@ -127,6 +145,7 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
 
         FeatureMapBuilder()
           .add(AuthorIdFeature, tweetAuthorId)
+          .add(ExclusiveConversationAuthorIdFeature, exclusiveAuthorIdOpt)
           .add(InReplyToTweetIdFeature, inReplyToTweetId)
           .add(IsHydratedFeature, true)
           .add(IsNsfw, Some(isNsfw))
@@ -137,20 +156,24 @@ class TweetypieFeatureHydrator @Inject() (tweetypieStitchClient: TweetypieStitch
           .add(QuotedUserIdFeature, quotedTweetUserId)
           .add(SourceTweetIdFeature, retweetedTweetId)
           .add(SourceUserIdFeature, retweetedTweetUserId)
+          .add(TweetLanguageFeature, tweetLanguage)
           .add(TweetTextFeature, tweetText)
           .add(VisibilityReason, found.suppressReason)
           .build()
 
       // If no tweet result found, return default and pre-existing features
       case _ =>
-        DefaultFeatureMap +
-          (AuthorIdFeature, existingFeatures.getOrElse(AuthorIdFeature, None)) +
-          (InReplyToTweetIdFeature, existingFeatures.getOrElse(InReplyToTweetIdFeature, None)) +
-          (IsRetweetFeature, existingFeatures.getOrElse(IsRetweetFeature, false)) +
-          (QuotedTweetIdFeature, existingFeatures.getOrElse(QuotedTweetIdFeature, None)) +
-          (QuotedUserIdFeature, existingFeatures.getOrElse(QuotedUserIdFeature, None)) +
-          (SourceTweetIdFeature, existingFeatures.getOrElse(SourceTweetIdFeature, None)) +
-          (SourceUserIdFeature, existingFeatures.getOrElse(SourceUserIdFeature, None))
+        DefaultFeatureMap ++ FeatureMapBuilder()
+          .add(AuthorIdFeature, existingFeatures.getOrElse(AuthorIdFeature, None))
+          .add(ExclusiveConversationAuthorIdFeature, exclusiveAuthorIdOpt)
+          .add(InReplyToTweetIdFeature, existingFeatures.getOrElse(InReplyToTweetIdFeature, None))
+          .add(IsRetweetFeature, existingFeatures.getOrElse(IsRetweetFeature, false))
+          .add(QuotedTweetIdFeature, existingFeatures.getOrElse(QuotedTweetIdFeature, None))
+          .add(QuotedUserIdFeature, existingFeatures.getOrElse(QuotedUserIdFeature, None))
+          .add(SourceTweetIdFeature, existingFeatures.getOrElse(SourceTweetIdFeature, None))
+          .add(SourceUserIdFeature, existingFeatures.getOrElse(SourceUserIdFeature, None))
+          .add(TweetLanguageFeature, existingFeatures.getOrElse(TweetLanguageFeature, None))
+          .build()
     }
   }
 }

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/adapters/author_features/AuthorFeaturesAdapter.scala

@@ -1,59 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator.adapters.author_features
-
-import com.twitter.ml.api.DataRecordMerger
-import com.twitter.ml.api.Feature
-import com.twitter.ml.api.FeatureContext
-import com.twitter.ml.api.RichDataRecord
-import com.twitter.ml.api.util.CompactDataRecordConverter
-import com.twitter.ml.api.util.FDsl._
-import com.twitter.timelines.author_features.v1.{thriftjava => af}
-import com.twitter.timelines.prediction.common.adapters.TimelinesMutatingAdapterBase
-import com.twitter.timelines.prediction.common.aggregates.TimelinesAggregationConfig
-import com.twitter.timelines.prediction.features.user_health.UserHealthFeatures
-
-object AuthorFeaturesAdapter extends TimelinesMutatingAdapterBase[Option[af.AuthorFeatures]] {
-
-  private val originalAuthorAggregatesFeatures =
-    TimelinesAggregationConfig.originalAuthorReciprocalEngagementAggregates
-      .buildTypedAggregateGroups().flatMap(_.allOutputFeatures)
-  private val authorFeatures = originalAuthorAggregatesFeatures ++
-    Seq(
-      UserHealthFeatures.AuthorState,
-      UserHealthFeatures.NumAuthorFollowers,
-      UserHealthFeatures.NumAuthorConnectDays,
-      UserHealthFeatures.NumAuthorConnect)
-  private val featureContext = new FeatureContext(authorFeatures: _*)
-
-  override def getFeatureContext: FeatureContext = featureContext
-
-  override val commonFeatures: Set[Feature[_]] = Set.empty
-
-  private val compactDataRecordConverter = new CompactDataRecordConverter()
-  private val drMerger = new DataRecordMerger()
-
-  override def setFeatures(
-    authorFeaturesOpt: Option[af.AuthorFeatures],
-    richDataRecord: RichDataRecord
-  ): Unit = {
-    authorFeaturesOpt.foreach { authorFeatures =>
-      val dataRecord = richDataRecord.getRecord
-
-      dataRecord.setFeatureValue(
-        UserHealthFeatures.AuthorState,
-        authorFeatures.user_health.user_state.getValue.toLong)
-      dataRecord.setFeatureValue(
-        UserHealthFeatures.NumAuthorFollowers,
-        authorFeatures.user_health.num_followers.toDouble)
-      dataRecord.setFeatureValue(
-        UserHealthFeatures.NumAuthorConnectDays,
-        authorFeatures.user_health.num_connect_days.toDouble)
-      dataRecord.setFeatureValue(
-        UserHealthFeatures.NumAuthorConnect,
-        authorFeatures.user_health.num_connect.toDouble)
-
-      val originalAuthorAggregatesDataRecord =
-        compactDataRecordConverter.compactDataRecordToDataRecord(authorFeatures.aggregates)
-      drMerger.merge(dataRecord, originalAuthorAggregatesDataRecord)
-    }
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator/offline_aggregates/Phase2EdgeAggregateFeatureHydrator.scala

@@ -1,22 +0,0 @@
-package com.twitter.home_mixer.functional_component.feature_hydrator.offline_aggregates
-
-import com.twitter.home_mixer.functional_component.feature_hydrator.offline_aggregates.EdgeAggregateFeatures._
-import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class Phase2EdgeAggregateFeatureHydrator @Inject() extends BaseEdgeAggregateFeatureHydrator {
-
-  override val identifier: FeatureHydratorIdentifier =
-    FeatureHydratorIdentifier("Phase2EdgeAggregate")
-
-  override val aggregateFeatures: Set[BaseEdgeAggregateFeature] =
-    Set(
-      UserEngagerAggregateFeature,
-      UserEngagerGoodClickAggregateFeature,
-      UserInferredTopicAggregateFeature,
-      UserTopicAggregateFeature,
-      UserMediaUnderstandingAnnotationAggregateFeature
-    )
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/BUILD.bazel

@@ -4,6 +4,7 @@ scala_library(
     strict_deps = True,
     tags = ["bazel-compatible"],
     dependencies = [
+        "home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/feature_hydrator",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/scored_tweets/param",
@@ -16,9 +17,11 @@ scala_library(
         "src/thrift/com/twitter/tweetypie:service-scala",
         "src/thrift/com/twitter/tweetypie:tweet-scala",
         "stitch/stitch-core",
+        "stitch/stitch-socialgraph",
         "stitch/stitch-tweetypie",
         "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/store/persistence",
         "timelineservice/common/src/main/scala/com/twitter/timelineservice/model",
+        "util/util-slf4j-api/src/main/scala",
     ],
     exports = [
         "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/store/persistence",

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/FeedbackFatigueFilter.scala

@@ -72,7 +72,7 @@ object FeedbackFatigueFilter
 
       originalAuthorId.exists(authorsToFilter.contains) ||
       (likers.nonEmpty && eligibleLikers.isEmpty) ||
-      (followers.nonEmpty && eligibleFollowers.isEmpty) ||
+      (followers.nonEmpty && eligibleFollowers.isEmpty && likers.isEmpty) ||
       (candidate.features.getOrElse(IsRetweetFeature, false) &&
       authorId.exists(retweetersToFilter.contains))
     }

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/InvalidSubscriptionTweetFilter.scala

@@ -0,0 +1,70 @@
+package com.twitter.home_mixer.functional_component.filter
+
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.finagle.tracing.Trace
+import com.twitter.home_mixer.model.HomeFeatures.ExclusiveConversationAuthorIdFeature
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.functional_component.filter.Filter
+import com.twitter.product_mixer.core.functional_component.filter.FilterResult
+import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
+import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.socialgraph.{thriftscala => sg}
+import com.twitter.stitch.Stitch
+import com.twitter.stitch.socialgraph.SocialGraph
+import com.twitter.util.logging.Logging
+
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Exclude invalid subscription tweets - cases where the viewer is not subscribed to the author
+ *
+ * If SGS hydration fails, `SGSInvalidSubscriptionTweetFeature` will be set to None for
+ * subscription tweets, so we explicitly filter those tweets out.
+ */
+@Singleton
+case class InvalidSubscriptionTweetFilter @Inject() (
+  socialGraphClient: SocialGraph,
+  statsReceiver: StatsReceiver)
+    extends Filter[PipelineQuery, TweetCandidate]
+    with Logging {
+
+  override val identifier: FilterIdentifier = FilterIdentifier("InvalidSubscriptionTweet")
+
+  private val scopedStatsReceiver = statsReceiver.scope(identifier.toString)
+  private val validCounter = scopedStatsReceiver.counter("validExclusiveTweet")
+  private val invalidCounter = scopedStatsReceiver.counter("invalidExclusiveTweet")
+
+  override def apply(
+    query: PipelineQuery,
+    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
+  ): Stitch[FilterResult[TweetCandidate]] = Stitch
+    .traverse(candidates) { candidate =>
+      val exclusiveAuthorId =
+        candidate.features.getOrElse(ExclusiveConversationAuthorIdFeature, None)
+
+      if (exclusiveAuthorId.isDefined) {
+        val request = sg.ExistsRequest(
+          source = query.getRequiredUserId,
+          target = exclusiveAuthorId.get,
+          relationships =
+            Seq(sg.Relationship(sg.RelationshipType.TierOneSuperFollowing, hasRelationship = true)),
+        )
+        socialGraphClient.exists(request).map(_.exists).map { valid =>
+          if (!valid) invalidCounter.incr() else validCounter.incr()
+          valid
+        }
+      } else Stitch.value(true)
+    }.map { validResults =>
+      val (kept, removed) = candidates
+        .map(_.candidate)
+        .zip(validResults)
+        .partition { case (candidate, valid) => valid }
+
+      val keptCandidates = kept.map { case (candidate, _) => candidate }
+      val removedCandidates = removed.map { case (candidate, _) => candidate }
+
+      FilterResult(kept = keptCandidates, removed = removedCandidates)
+    }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/PredicateFeatureFilter.scala

@@ -1,59 +0,0 @@
-package com.twitter.home_mixer.functional_component.filter
-
-import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
-import com.twitter.product_mixer.core.functional_component.filter.Filter
-import com.twitter.product_mixer.core.functional_component.filter.FilterResult
-import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
-import com.twitter.product_mixer.core.model.common.UniversalNoun
-import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.stitch.Stitch
-
-/**
- * Predicate which will be applied to each candidate. True indicates that the candidate will be
- * @tparam Candidate - the type of the candidate
- */
-trait ShouldKeepCandidate {
-  def apply(features: FeatureMap): Boolean
-}
-
-object PredicateFeatureFilter {
-
-  /**
-   * Builds a simple Filter out of a predicate function from the candidate to a boolean. For clarity,
-   * we recommend including the name of the shouldKeepCandidate parameter.
-   *
-   * @param identifier A FilterIdentifier for the new filter
-   * @param shouldKeepCandidate A predicate function. Candidates will be kept when
-   *                            this function returns True.
-   */
-  def fromPredicate[Candidate <: UniversalNoun[Any]](
-    identifier: FilterIdentifier,
-    shouldKeepCandidate: ShouldKeepCandidate
-  ): Filter[PipelineQuery, Candidate] = {
-    val i = identifier
-
-    new Filter[PipelineQuery, Candidate] {
-      override val identifier: FilterIdentifier = i
-
-      /**
-       * Filter the list of candidates
-       *
-       * @return a FilterResult including both the list of kept candidate and the list of removed candidates
-       */
-      override def apply(
-        query: PipelineQuery,
-        candidates: Seq[CandidateWithFeatures[Candidate]]
-      ): Stitch[FilterResult[Candidate]] = {
-        val allowedIds = candidates
-          .filter(candidate => shouldKeepCandidate(candidate.features)).map(_.candidate.id).toSet
-
-        val (keptCandidates, removedCandidates) = candidates.map(_.candidate).partition {
-          candidate => allowedIds.contains(candidate.id)
-        }
-
-        Stitch.value(FilterResult(kept = keptCandidates, removed = removedCandidates))
-      }
-    }
-  }
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/PreviouslyServedTweetPreviewsFilter.scala

@@ -1,8 +1,6 @@
 package com.twitter.home_mixer.functional_component.filter
 
-import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
-import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
-import com.twitter.home_mixer.model.HomeFeatures.ScoreFeature
+import com.twitter.home_mixer.model.HomeFeatures.ServedTweetPreviewIdsFeature
 import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
 import com.twitter.product_mixer.core.functional_component.filter.Filter
 import com.twitter.product_mixer.core.functional_component.filter.FilterResult
@@ -11,24 +9,20 @@ import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
 import com.twitter.stitch.Stitch
 
-object KeepBestOutOfNetworkTweetPerAuthorFilter extends Filter[PipelineQuery, TweetCandidate] {
+object PreviouslyServedTweetPreviewsFilter extends Filter[PipelineQuery, TweetCandidate] {
 
-  override val identifier: FilterIdentifier = FilterIdentifier("KeepBestOutOfNetworkTweetPerAuthor")
+  override val identifier: FilterIdentifier = FilterIdentifier("PreviouslyServedTweetPreviews")
 
   override def apply(
     query: PipelineQuery,
     candidates: Seq[CandidateWithFeatures[TweetCandidate]]
   ): Stitch[FilterResult[TweetCandidate]] = {
-    // Set containing best OON tweet for each authorId
-    val bestCandidatesForAuthorId = candidates
-      .filter(!_.features.getOrElse(InNetworkFeature, true))
-      .groupBy(_.features.getOrElse(AuthorIdFeature, None))
-      .values.map(_.maxBy(_.features.getOrElse(ScoreFeature, None)))
-      .toSet
+
+    val servedTweetPreviewIds =
+      query.features.map(_.getOrElse(ServedTweetPreviewIdsFeature, Seq.empty)).toSeq.flatten.toSet
 
     val (removed, kept) = candidates.partition { candidate =>
-      !candidate.features.getOrElse(InNetworkFeature, true) &&
-      !bestCandidatesForAuthorId.contains(candidate)
+      servedTweetPreviewIds.contains(candidate.candidate.id)
     }
 
     Stitch.value(FilterResult(kept = kept.map(_.candidate), removed = removed.map(_.candidate)))

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/ReplyFilter.scala

@@ -0,0 +1,32 @@
+package com.twitter.home_mixer.functional_component.filter
+
+import com.twitter.home_mixer.model.HomeFeatures.InReplyToTweetIdFeature
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.functional_component.filter.Filter
+import com.twitter.product_mixer.core.functional_component.filter.FilterResult
+import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
+import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.stitch.Stitch
+
+object ReplyFilter extends Filter[PipelineQuery, TweetCandidate] {
+  override val identifier: FilterIdentifier = FilterIdentifier("Reply")
+
+  override def apply(
+    query: PipelineQuery,
+    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
+  ): Stitch[FilterResult[TweetCandidate]] = {
+
+    val (kept, removed) = candidates
+      .partition { candidate =>
+        candidate.features.getOrElse(InReplyToTweetIdFeature, None).isEmpty
+      }
+
+    val filterResult = FilterResult(
+      kept = kept.map(_.candidate),
+      removed = removed.map(_.candidate)
+    )
+
+    Stitch.value(filterResult)
+  }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/filter/RetweetFilter.scala

@@ -0,0 +1,32 @@
+package com.twitter.home_mixer.functional_component.filter
+
+import com.twitter.home_mixer.model.HomeFeatures.IsRetweetFeature
+import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
+import com.twitter.product_mixer.core.functional_component.filter.Filter
+import com.twitter.product_mixer.core.functional_component.filter.FilterResult
+import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
+import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
+import com.twitter.product_mixer.core.pipeline.PipelineQuery
+import com.twitter.stitch.Stitch
+
+object RetweetFilter extends Filter[PipelineQuery, TweetCandidate] {
+  override val identifier: FilterIdentifier = FilterIdentifier("Retweet")
+
+  override def apply(
+    query: PipelineQuery,
+    candidates: Seq[CandidateWithFeatures[TweetCandidate]]
+  ): Stitch[FilterResult[TweetCandidate]] = {
+
+    val (kept, removed) = candidates
+      .partition { candidate =>
+        !candidate.features.getOrElse(IsRetweetFeature, false)
+      }
+
+    val filterResult = FilterResult(
+      kept = kept.map(_.candidate),
+      removed = removed.map(_.candidate)
+    )
+
+    Stitch.value(filterResult)
+  }
+}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/gate/BUILD.bazel

@@ -14,7 +14,6 @@ scala_library(
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/functional_component/gate",
         "src/thrift/com/twitter/gizmoduck:thrift-scala",
         "stitch/stitch-socialgraph",
-        "timelinemixer/common/src/main/scala/com/twitter/timelinemixer/clients/manhattan",
         "timelinemixer/server/src/main/scala/com/twitter/timelinemixer/injection/store/persistence",
         "timelineservice/common/src/main/scala/com/twitter/timelineservice/model",
     ],

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/gate/DismissFatigueGate.scala

@@ -1,14 +1,14 @@
 package com.twitter.home_mixer.functional_component.gate
 
+import com.twitter.conversions.DurationOps._
+import com.twitter.product_mixer.core.feature.Feature
 import com.twitter.product_mixer.core.functional_component.gate.Gate
 import com.twitter.product_mixer.core.model.common.identifier.GateIdentifier
 import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.timelinemixer.clients.manhattan.DismissInfo
 import com.twitter.stitch.Stitch
-import com.twitter.util.Duration
-import com.twitter.conversions.DurationOps._
-import com.twitter.product_mixer.core.feature.Feature
+import com.twitter.timelinemixer.clients.manhattan.DismissInfo
 import com.twitter.timelineservice.suggests.thriftscala.SuggestType
+import com.twitter.util.Duration
 
 object DismissFatigueGate {
   // how long a dismiss action from user needs to be respected

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/gate/NonEmptySeqFeatureGate.scala

@@ -1,18 +0,0 @@
-package com.twitter.home_mixer.functional_component.gate
-
-import com.twitter.product_mixer.core.feature.Feature
-import com.twitter.product_mixer.core.functional_component.gate.Gate
-import com.twitter.product_mixer.core.model.common.identifier.GateIdentifier
-import com.twitter.product_mixer.core.pipeline.PipelineQuery
-import com.twitter.stitch.Stitch
-import scala.reflect.runtime.universe._
-
-case class NonEmptySeqFeatureGate[T: TypeTag](
-  feature: Feature[PipelineQuery, Seq[T]])
-    extends Gate[PipelineQuery] {
-
-  override val identifier: GateIdentifier = GateIdentifier(s"NonEmptySeq$feature")
-
-  override def shouldContinue(query: PipelineQuery): Stitch[Boolean] =
-    Stitch.value(query.features.exists(_.get(feature).nonEmpty))
-}

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/query_transformer/EditedTweetsCandidatePipelineQueryTransformer.scala

@@ -19,7 +19,7 @@ object EditedTweetsCandidatePipelineQueryTransformer
   override val identifier: TransformerIdentifier = TransformerIdentifier("EditedTweets")
 
   // The time window for which a tweet remains editable after creation.
-  private val EditTimeWindow = 30.minutes
+  private val EditTimeWindow = 60.minutes
 
   override def transform(query: PipelineQuery): Seq[Long] = {
     val applicableCandidates = getApplicableCandidates(query)
@@ -29,8 +29,8 @@ object EditedTweetsCandidatePipelineQueryTransformer
       // Any tweets in it could have become stale since being served.
       val previousTimelineLoadTime = applicableCandidates.head.servedTime
 
-      // The time window for editing a tweet is 30 minutes,
-      // so we ignore responses older than (PTL Time - 30 mins).
+      // The time window for editing a tweet is 60 minutes,
+      // so we ignore responses older than (PTL Time - 60 mins).
       val inWindowCandidates: Seq[PersistenceStoreEntry] = applicableCandidates
         .takeWhile(_.servedTime.until(previousTimelineLoadTime) < EditTimeWindow)
 

home-mixer/server/src/main/scala/com/twitter/home_mixer/functional_component/scorer/BUILD.bazel

@@ -6,7 +6,6 @@ scala_library(
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/model/request",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/param",
-        "home-mixer/server/src/main/scala/com/twitter/home_mixer/product/for_you/model",
         "home-mixer/server/src/main/scala/com/twitter/home_mixer/util",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/pipeline",
         "product-mixer/core/src/main/scala/com/twitter/product_mixer/core/product",