diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.8.0.0 — 2026-07-04
+
+### Breaking Changes
+
+- Version bumped to track `shibuya-core` 0.8.0.0.
+- The Prometheus endpoint no longer emits
+  `shibuya_messages_dropped_total`; `shibuya-core` removed the always-zero
+  `StreamStats.dropped` counter.
+- Internal imports moved from `Shibuya.Runner.Master` and
+  `Shibuya.Runner.Metrics` to the new public paths `Shibuya.App` and
+  `Shibuya.Core.Metrics`. Application code using `shibuya-metrics` through
+  `Shibuya.Metrics` does not need to change.
+
 ## 0.7.1.0 — 2026-06-15
 
 Version bumped to track `shibuya-core` 0.7.1.0. No user-visible changes
diff --git a/shibuya-metrics.cabal b/shibuya-metrics.cabal
--- a/shibuya-metrics.cabal
+++ b/shibuya-metrics.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.12
 name: shibuya-metrics
-version: 0.7.1.0
+version: 0.8.0.0
 synopsis: Metrics web server for Shibuya queue processing framework
 description:
   Provides HTTP/JSON, Prometheus, and WebSocket endpoints for
@@ -48,11 +48,10 @@
     containers ^>=0.7,
     http-types ^>=0.12,
     prometheus-client ^>=1.1,
-    shibuya-core ^>=0.7.1.0,
+    shibuya-core ^>=0.8.0.0,
     stm ^>=2.5,
     text ^>=2.1,
     time ^>=1.14,
-    unliftio ^>=0.2,
     wai ^>=3.2,
     wai-websockets ^>=3.0,
     warp ^>=3.4,
diff --git a/src/Shibuya/Metrics/Health.hs b/src/Shibuya/Metrics/Health.hs
--- a/src/Shibuya/Metrics/Health.hs
+++ b/src/Shibuya/Metrics/Health.hs
@@ -30,8 +30,8 @@
 import Data.Maybe (isJust)
 import Data.Text (Text)
 import Data.Time.Clock (NominalDiffTime, UTCTime, diffUTCTime, getCurrentTime)
-import Shibuya.Runner.Master (Master, getAllMetricsIO)
-import Shibuya.Runner.Metrics
+import Shibuya.App (Master, getAllMetricsIO)
+import Shibuya.Core.Metrics
   ( MetricsMap,
     ProcessorMetrics (..),
     ProcessorState (..),
diff --git a/src/Shibuya/Metrics/JSON.hs b/src/Shibuya/Metrics/JSON.hs
--- a/src/Shibuya/Metrics/JSON.hs
+++ b/src/Shibuya/Metrics/JSON.hs
@@ -16,6 +16,8 @@
     status503,
   )
 import Network.Wai (Application, Response, pathInfo, responseLBS)
+import Shibuya.App (Master, getAllMetricsIO, getProcessorMetricsIO)
+import Shibuya.Core.Metrics (ProcessorId (..))
 import Shibuya.Metrics.Health
   ( DependencyCheck,
     HealthConfig,
@@ -26,8 +28,6 @@
     checkReadiness,
     defaultHealthConfig,
   )
-import Shibuya.Runner.Master (Master, getAllMetricsIO, getProcessorMetricsIO)
-import Shibuya.Runner.Metrics (ProcessorId (..))
 
 -- | WAI application for JSON endpoints (without dependency checks).
 -- Handles:
diff --git a/src/Shibuya/Metrics/Prometheus.hs b/src/Shibuya/Metrics/Prometheus.hs
--- a/src/Shibuya/Metrics/Prometheus.hs
+++ b/src/Shibuya/Metrics/Prometheus.hs
@@ -11,8 +11,8 @@
 import Data.Text.Encoding qualified as Text
 import Network.HTTP.Types (hContentType, status200)
 import Network.Wai (Application, responseLBS)
-import Shibuya.Runner.Master (Master, getAllMetricsIO)
-import Shibuya.Runner.Metrics
+import Shibuya.App (Master, getAllMetricsIO)
+import Shibuya.Core.Metrics
   ( InFlightInfo (..),
     MetricsMap,
     ProcessorId (..),
@@ -43,9 +43,6 @@
       renderHelp "shibuya_messages_processed_total" "Total messages successfully processed",
       renderType "shibuya_messages_processed_total" "counter",
       renderGaugeMetrics "shibuya_messages_processed_total" (fromIntegral . (.stats.processed)) metrics,
-      renderHelp "shibuya_messages_dropped_total" "Total messages dropped due to backpressure",
-      renderType "shibuya_messages_dropped_total" "counter",
-      renderGaugeMetrics "shibuya_messages_dropped_total" (fromIntegral . (.stats.dropped)) metrics,
       renderHelp "shibuya_messages_failed_total" "Total messages that failed processing",
       renderType "shibuya_messages_failed_total" "counter",
       renderGaugeMetrics "shibuya_messages_failed_total" (fromIntegral . (.stats.failed)) metrics,
diff --git a/src/Shibuya/Metrics/Server.hs b/src/Shibuya/Metrics/Server.hs
--- a/src/Shibuya/Metrics/Server.hs
+++ b/src/Shibuya/Metrics/Server.hs
@@ -23,13 +23,13 @@
 import Network.Wai.Handler.Warp qualified as Warp
 import Network.Wai.Handler.WebSockets qualified as WaiWS
 import Network.WebSockets qualified as WS
+import Shibuya.App (Master)
 import Shibuya.Metrics.Config (MetricsServerConfig (..), defaultConfig)
 import Shibuya.Metrics.Health (DependencyCheck, HealthConfig (..))
 import Shibuya.Metrics.JSON (jsonAppWithHealth)
 import Shibuya.Metrics.Prometheus (prometheusApp)
 import Shibuya.Metrics.Types (MetricsServer (..))
 import Shibuya.Metrics.WebSocket (WebSocketState, newWebSocketState, websocketApp)
-import Shibuya.Runner.Master (Master)
 
 -- | Start the metrics server without dependency checks.
 -- Returns a handle that can be used to stop the server.
diff --git a/src/Shibuya/Metrics/Types.hs b/src/Shibuya/Metrics/Types.hs
--- a/src/Shibuya/Metrics/Types.hs
+++ b/src/Shibuya/Metrics/Types.hs
@@ -22,7 +22,7 @@
 import Data.Text qualified as Text
 import GHC.Generics (Generic)
 import Network.Wai.Handler.Warp (Port)
-import Shibuya.Runner.Metrics (MetricsMap, ProcessorId, ProcessorMetrics)
+import Shibuya.Core.Metrics (MetricsMap, ProcessorId, ProcessorMetrics)
 
 --------------------------------------------------------------------------------
 -- WebSocket Protocol
diff --git a/src/Shibuya/Metrics/WebSocket.hs b/src/Shibuya/Metrics/WebSocket.hs
--- a/src/Shibuya/Metrics/WebSocket.hs
+++ b/src/Shibuya/Metrics/WebSocket.hs
@@ -24,10 +24,10 @@
 import Data.Set (Set)
 import Data.Set qualified as Set
 import Network.WebSockets qualified as WS
+import Shibuya.App (Master, getAllMetricsIO)
+import Shibuya.Core.Metrics (MetricsMap, ProcessorId (..), ProcessorMetrics)
 import Shibuya.Metrics.Config (MetricsServerConfig (..))
 import Shibuya.Metrics.Types (ClientMessage (..), ServerMessage (..))
-import Shibuya.Runner.Master (Master, getAllMetricsIO)
-import Shibuya.Runner.Metrics (MetricsMap, ProcessorId (..), ProcessorMetrics)
 
 --------------------------------------------------------------------------------
 -- WebSocket State