diff --git a/contract-tests/client_entity.rb b/contract-tests/client_entity.rb
index 871c6b2b..dc932691 100644
--- a/contract-tests/client_entity.rb
+++ b/contract-tests/client_entity.rb
@@ -3,6 +3,7 @@
 require 'net/http'
 require 'launchdarkly-server-sdk'
 require './big_segment_store_fixture'
+require './hook'
 require 'http'
 
 class ClientEntity
@@ -62,6 +63,12 @@ def initialize(log, config)
       }
     end
 
+    if config[:hooks]
+      opts[:hooks] = config[:hooks][:hooks].map do |hook|
+        Hook.new(hook[:name], hook[:callbackUri], hook[:data] || {})
+      end
+    end
+
     startWaitTimeMs = config[:startWaitTimeMs] || 5_000
 
     @client = LaunchDarkly::LDClient.new(
diff --git a/contract-tests/hook.rb b/contract-tests/hook.rb
new file mode 100644
index 00000000..89690ce9
--- /dev/null
+++ b/contract-tests/hook.rb
@@ -0,0 +1,68 @@
+require 'ldclient-rb'
+
+class Hook
+  include LaunchDarkly::Interfaces::Hooks::Hook
+
+  #
+  # @param name [String]
+  # @param callback_uri [String]
+  # @param data [Hash]
+  #
+  def initialize(name, callback_uri, data)
+    @metadata = LaunchDarkly::Interfaces::Hooks::Metadata.new(name)
+    @callback_uri = callback_uri
+    @data = data
+    @context_filter = LaunchDarkly::Impl::ContextFilter.new(false, [])
+  end
+
+  def metadata
+    @metadata
+  end
+
+  #
+  # @param evaluation_series_context [LaunchDarkly::Interfaces::Hooks::EvaluationSeriesContext]
+  # @param data [Hash]
+  #
+  def before_evaluation(evaluation_series_context, data)
+    payload = {
+      evaluationSeriesContext: {
+        flagKey: evaluation_series_context.key,
+        context: @context_filter.filter(evaluation_series_context.context),
+        defaultValue: evaluation_series_context.default_value,
+        method: evaluation_series_context.method,
+      },
+      evaluationSeriesData: data,
+      stage: 'beforeEvaluation',
+    }
+    result = HTTP.post(@callback_uri, json: payload)
+
+    (data || {}).merge(@data[:beforeEvaluation] || {})
+  end
+
+
+  #
+  # @param evaluation_series_context [LaunchDarkly::Interfaces::Hooks::EvaluationSeriesContext]
+  # @param data [Hash]
+  # @param detail [LaunchDarkly::EvaluationDetail]
+  #
+  def after_evaluation(evaluation_series_context, data, detail)
+    payload = {
+      evaluationSeriesContext: {
+        flagKey: evaluation_series_context.key,
+        context: @context_filter.filter(evaluation_series_context.context),
+        defaultValue: evaluation_series_context.default_value,
+        method: evaluation_series_context.method,
+      },
+      evaluationSeriesData: data,
+      evaluationDetail: {
+        value: detail.value,
+        variationIndex: detail.variation_index,
+        reason: detail.reason,
+      },
+      stage: 'afterEvaluation',
+    }
+    HTTP.post(@callback_uri, json: payload)
+
+    (data || {}).merge(@data[:afterEvaluation] || {})
+  end
+end
diff --git a/contract-tests/service.rb b/contract-tests/service.rb
index 10d66e16..5f252970 100644
--- a/contract-tests/service.rb
+++ b/contract-tests/service.rb
@@ -39,6 +39,7 @@
       'polling-gzip',
       'inline-context',
       'anonymous-redaction',
+      'evaluation-hooks',
     ],
   }.to_json
 end
diff --git a/lib/ldclient-rb/interfaces.rb b/lib/ldclient-rb/interfaces.rb
index c76683a9..956a5f6a 100644
--- a/lib/ldclient-rb/interfaces.rb
+++ b/lib/ldclient-rb/interfaces.rb
@@ -916,7 +916,7 @@ def metadata
         # @return [Hash] Data to use when executing the next state of the hook in the evaluation series.
         #
         def before_evaluation(evaluation_series_context, data)
-          {}
+          data
         end
 
         #
@@ -953,19 +953,19 @@ def initialize(name)
       class EvaluationSeriesContext
         attr_reader :key
         attr_reader :context
-        attr_reader :value
+        attr_reader :default_value
         attr_reader :method
 
         #
         # @param key [String]
         # @param context [LaunchDarkly::LDContext]
-        # @param value [any]
+        # @param default_value [any]
         # @param method [Symbol]
         #
-        def initialize(key, context, value, method)
+        def initialize(key, context, default_value, method)
           @key = key
           @context = context
-          @value = value
+          @default_value = default_value
           @method = method
         end
       end
diff --git a/lib/ldclient-rb/ldclient.rb b/lib/ldclient-rb/ldclient.rb
index 3495dce3..e86e9955 100644
--- a/lib/ldclient-rb/ldclient.rb
+++ b/lib/ldclient-rb/ldclient.rb
@@ -245,6 +245,7 @@ def variation(key, context, default)
     # @return [EvaluationDetail] an object describing the result
     #
     def variation_detail(key, context, default)
+      context = Impl::Context::make_context(context)
       detail, _, _ = evaluate_with_hooks(key, context, default, :variation_detail) do
         evaluate_internal(key, context, default, true)
       end
@@ -264,8 +265,8 @@ def variation_detail(key, context, default)
     # ```
     #
     # @param key [String]
-    # @param context [String]
-    # @param default [String]
+    # @param context [LDContext]
+    # @param default [any]
     # @param method [Symbol]
     # @param &block [#call] Implicit passed block
     #
@@ -633,6 +634,7 @@ def create_default_data_source(sdk_key, config, diagnostic_accumulator)
     # @return [Array<EvaluationDetail, [LaunchDarkly::Impl::Model::FeatureFlag, nil], [String, nil]>]
     #
     def variation_with_flag(key, context, default)
+      context = Impl::Context::make_context(context)
       evaluate_with_hooks(key, context, default, :variation_detail) do
         evaluate_internal(key, context, default, false)
       end
@@ -640,7 +642,7 @@ def variation_with_flag(key, context, default)
 
     #
     # @param key [String]
-    # @param context [Hash, LDContext]
+    # @param context [LDContext]
     # @param default [Object]
     # @param with_reasons [Boolean]
     #
@@ -657,7 +659,6 @@ def evaluate_internal(key, context, default, with_reasons)
         return detail, nil, "no context provided"
       end
 
-      context = Impl::Context::make_context(context)
       unless context.valid?
         @config.logger.error { "[LDClient] Context was invalid for evaluation of flag '#{key}' (#{context.error}); returning default value" }
         detail = Evaluator.error_result(EvaluationReason::ERROR_USER_NOT_SPECIFIED, default)