diff --git a/README_PATCH.md b/README_PATCH.md
index bf6c938..07904e4 100644
--- a/README_PATCH.md
+++ b/README_PATCH.md
@@ -1,60 +1,35 @@
-# Patch: Reusable Esper runtime execution-state cleanup
+# Driver-working-time Esper contract refactoring
 
-## Purpose
+This patch removes tachograph-prefixed Esper contract names from the active source-neutral driver-working-time pipeline without changing processing behavior.
 
-Prevent retained Esper state from leaking between pipeline executions when `DriverWorkingTimeReusableProjectionBuilder` reuses a pooled runtime.
+## New canonical Esper contracts
 
-## Runtime lifecycle
+- `DriverWorkingTimeActivityPointInputEvent`
+- `DriverWorkingTimeVehicleUsagePointInputEvent`
+- `DriverWorkingTimeActivityIntervalInputEvent`
+- `DriverWorkingTimeVehicleUsageIntervalInputEvent`
+- `DriverWorkingTimeSupportEvidenceInputEvent`
+- `DriverWorkingTimeProjectionFinalizeEvent`
+- `DriverWorkingTimeVehicleUsageIntervalInputWindow`
 
-A pooled runtime now follows this lifecycle:
+`DriverWorkingTimeEsperContractNames` centralizes these names for Java-side registration, event sending, cleanup, and future common modules.
 
-```text
-acquire runtime
--> clear execution state before sending events
--> execute the complete derived-projection module
--> detach result listeners
--> clear execution state again in finally
--> return only a clean runtime to the pool
-```
+## Updated active common components
 
-If execution or cleanup fails, the runtime is marked unsafe and destroyed instead of being pooled.
+- `DriverWorkingTimeReusableProjectionBuilder`
+- `driver-working-time-derived-projections.epl`
+- `runtime-driver-event-interval-preprocessor.epl`
+- runtime cleanup query for the vehicle-usage input window
+- contract and cleanup regression tests
+- runtime-processing documentation
 
-## Resettable input retention
+## Compatibility
 
-The statement-local usages of:
+The tachograph-specific legacy resources and file-session compatibility code are intentionally not renamed. They remain isolated compatibility artifacts. No public request/response DTO, module key, plan key, or business rule is changed.
 
-```epl
-TachographVehicleUsageIntervalInputEvent#keepall
-```
+## Validation
 
-have been replaced with the public named window:
-
-```epl
-TachographVehicleUsageIntervalInputWindow#keepall
-```
-
-The window is populated from `TachographVehicleUsageIntervalInputEvent` and is part of the cleanup contract. This prevents odometer and vehicle-usage evidence from a previous execution from participating in a later execution.
-
-The earlier `VuCardAbsentIntervalWindow` fix is retained.
-
-## Cleanup contract
-
-All public named windows in `driver-working-time-derived-projections.epl`, including the context-scoped `PreviousVehicleUsageInterval`, have corresponding fire-and-forget delete queries.
-
-A regression test scans the EPL and fails when a newly introduced public named window is not added to the cleanup contract.
-
-## Metrics
-
-Runtime logging now reports separate values:
-
-- `runtimeResetBeforeMs`
-- `runtimeResetAfterMs`
-
-## Tests
-
-Added/retained tests for:
-
-- identical results when a warm runtime is reused;
-- no doubled card-absent coverage and coverage not exceeding 100%;
-- no retained vehicle-usage/odometer evidence in the next execution;
-- cleanup-query coverage for every public named window.
+- Verified that active common Java/EPL files contain no legacy tachograph input-contract names.
+- Verified that all public named windows still have cleanup coverage.
+- Compiled the new contract-name class with `javac`.
+- Maven tests were not run because Maven and a Maven wrapper are unavailable in the environment.
diff --git a/docs/runtime-driver-working-time-processing.md b/docs/runtime-driver-working-time-processing.md
index 96b5619..866b2ed 100644
--- a/docs/runtime-driver-working-time-processing.md
+++ b/docs/runtime-driver-working-time-processing.md
@@ -79,6 +79,20 @@ tachograph-driving-derived-projection-bundle.epl
 
 New runtime-processing code should use the driver-working-time names.
 
+The common Esper contract is source-neutral as well:
+
+```text
+DriverWorkingTimeActivityPointInputEvent
+DriverWorkingTimeVehicleUsagePointInputEvent
+DriverWorkingTimeActivityIntervalInputEvent
+DriverWorkingTimeVehicleUsageIntervalInputEvent
+DriverWorkingTimeSupportEvidenceInputEvent
+DriverWorkingTimeProjectionFinalizeEvent
+DriverWorkingTimeVehicleUsageIntervalInputWindow
+```
+
+Tachograph-prefixed Esper types remain only inside the compatibility resources listed above.
+
 ## EPL-backed phase modules
 
 The driver working-time plan now contains first-class EPL-backed phase modules for event-to-interval conversion:
diff --git a/docs/runtime-event-processing.md b/docs/runtime-event-processing.md
index beab185..9427ebb 100644
--- a/docs/runtime-event-processing.md
+++ b/docs/runtime-event-processing.md
@@ -22,12 +22,6 @@ POST /api/eventhub/runtime-processing/event-processing
 
 but it should be treated as a legacy profile adapter. New clients should use `processingPlanKey`, not `profileKey`.
 
-## Assembly terminology
-
-`runtime-event-assembly` collects driver seed events and, when enabled, additional events for vehicles discovered in the driver scope. The resulting collection is an **aggregated runtime scope**. It is only canonically de-duplicated and ordered at this stage; semantic card/VU evidence mixing and vehicle-usage interval reconciliation are performed by later modules.
-
-For API compatibility, `UnifiedRuntimeEventBundle` still exposes this collection as `mergedEvents`. New internal assembly-stage code uses the alias `aggregatedEvents`, and assembly-module metadata exposes `aggregatedEventCount` while retaining `mergedEventCount` as a compatibility alias.
-
 ## First predefined plan
 
 The first predefined plan is:
@@ -174,6 +168,10 @@ RuntimeDriverWorkingTimeScopeProcessingService
 
 Legacy tachograph names are kept as compatibility adapters for existing file-session endpoints and Postman requests. New runtime code should use the `driver-working-time-*` classes/resources and the `driver-working-time-v1` processing plan.
 
+The active common EPL contracts use `DriverWorkingTime*InputEvent` and
+`DriverWorkingTimeVehicleUsageIntervalInputWindow` names. Tachograph-prefixed Esper input
+contracts are limited to legacy compatibility resources.
+
 ## Module execution results
 
 `/api/eventhub/runtime-processing/executions` now exposes module execution metadata explicitly.
diff --git a/src/main/java/at/procon/eventhub/processing/driverworkingtime/esper/DriverWorkingTimeEsperContractNames.java b/src/main/java/at/procon/eventhub/processing/driverworkingtime/esper/DriverWorkingTimeEsperContractNames.java
new file mode 100644
index 0000000..481f701
--- /dev/null
+++ b/src/main/java/at/procon/eventhub/processing/driverworkingtime/esper/DriverWorkingTimeEsperContractNames.java
@@ -0,0 +1,28 @@
+package at.procon.eventhub.processing.driverworkingtime.esper;
+
+/**
+ * Canonical Esper type and state names used by the source-neutral driver-working-time pipeline.
+ *
+ * <p>Source-specific adapters may keep their own compatibility names, but common runtime modules
+ * must use these contracts after source events have been normalized.</p>
+ */
+public final class DriverWorkingTimeEsperContractNames {
+
+    public static final String ACTIVITY_POINT_INPUT_EVENT_TYPE =
+            "DriverWorkingTimeActivityPointInputEvent";
+    public static final String VEHICLE_USAGE_POINT_INPUT_EVENT_TYPE =
+            "DriverWorkingTimeVehicleUsagePointInputEvent";
+    public static final String ACTIVITY_INTERVAL_INPUT_EVENT_TYPE =
+            "DriverWorkingTimeActivityIntervalInputEvent";
+    public static final String VEHICLE_USAGE_INTERVAL_INPUT_EVENT_TYPE =
+            "DriverWorkingTimeVehicleUsageIntervalInputEvent";
+    public static final String SUPPORT_EVIDENCE_INPUT_EVENT_TYPE =
+            "DriverWorkingTimeSupportEvidenceInputEvent";
+    public static final String PROJECTION_FINALIZE_EVENT_TYPE =
+            "DriverWorkingTimeProjectionFinalizeEvent";
+    public static final String VEHICLE_USAGE_INTERVAL_INPUT_WINDOW =
+            "DriverWorkingTimeVehicleUsageIntervalInputWindow";
+
+    private DriverWorkingTimeEsperContractNames() {
+    }
+}
diff --git a/src/main/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilder.java b/src/main/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilder.java
index de94cd8..ef46d54 100644
--- a/src/main/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilder.java
+++ b/src/main/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilder.java
@@ -11,6 +11,7 @@ import com.espertech.esper.runtime.client.EPDeployment;
 import com.espertech.esper.runtime.client.EPRuntime;
 import com.espertech.esper.runtime.client.EPRuntimeProvider;
 import at.procon.eventhub.config.EventHubProperties;
+import at.procon.eventhub.processing.driverworkingtime.esper.DriverWorkingTimeEsperContractNames;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeActivityInterval;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeDerivedProjectionBundle;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeDrivingInterruptionInterval;
@@ -59,7 +60,7 @@ public class DriverWorkingTimeReusableProjectionBuilder {
     private static final Map<String, Object> SUPPORT_GEO_EVIDENCE_INPUT_DEFINITION = supportGeoEvidenceInputDefinitionStatic();
     private static final int MAX_IDLE_RUNTIMES_PER_DEFINITION = 2;
     static final List<String> REUSABLE_RUNTIME_STATE_CLEANUP_QUERIES = List.of(
-            "delete from TachographVehicleUsageIntervalInputWindow",
+            "delete from " + DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_WINDOW,
             "delete from PreviousRestCandidateCoverageInterval",
             "delete from OpenPotentialInVehicleTripState",
             "delete from SupportGeoEvidenceWindow",
@@ -440,15 +441,15 @@ public class DriverWorkingTimeReusableProjectionBuilder {
     private Configuration createRuntimeConfiguration() {
         Configuration configuration = new Configuration();
         configuration.getCommon().addEventType(
-                "TachographActivityIntervalInputEvent",
+                DriverWorkingTimeEsperContractNames.ACTIVITY_INTERVAL_INPUT_EVENT_TYPE,
                 activityIntervalInputDefinition()
         );
         configuration.getCommon().addEventType(
-                "TachographVehicleUsageIntervalInputEvent",
+                DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_EVENT_TYPE,
                 vehicleUsageIntervalInputDefinition()
         );
         configuration.getCommon().addEventType(
-                "TachographSupportGeoEvidenceInputEvent",
+                DriverWorkingTimeEsperContractNames.SUPPORT_EVIDENCE_INPUT_EVENT_TYPE,
                 supportGeoEvidenceInputDefinition()
         );
         return configuration;
@@ -1179,19 +1180,19 @@ public class DriverWorkingTimeReusableProjectionBuilder {
 
         private void sendSupportGeoEvent(Map<String, Object> event) {
             long startedAtNanos = System.nanoTime();
-            delegate.getEventService().sendEventMap(event, "TachographSupportGeoEvidenceInputEvent");
+            delegate.getEventService().sendEventMap(event, DriverWorkingTimeEsperContractNames.SUPPORT_EVIDENCE_INPUT_EVENT_TYPE);
             sendSupportGeoMs += elapsedMillisStatic(startedAtNanos);
         }
 
         private void sendVehicleUsageEvent(Map<String, Object> event) {
             long startedAtNanos = System.nanoTime();
-            delegate.getEventService().sendEventMap(event, "TachographVehicleUsageIntervalInputEvent");
+            delegate.getEventService().sendEventMap(event, DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_EVENT_TYPE);
             sendVehicleUsageMs += elapsedMillisStatic(startedAtNanos);
         }
 
         private void sendActivityEvent(Map<String, Object> event) {
             long startedAtNanos = System.nanoTime();
-            delegate.getEventService().sendEventMap(event, "TachographActivityIntervalInputEvent");
+            delegate.getEventService().sendEventMap(event, DriverWorkingTimeEsperContractNames.ACTIVITY_INTERVAL_INPUT_EVENT_TYPE);
             sendActivityMs += elapsedMillisStatic(startedAtNanos);
         }
 
diff --git a/src/main/resources/esper/driver-working-time-derived-projections.epl b/src/main/resources/esper/driver-working-time-derived-projections.epl
index 02ee189..05eeda9 100644
--- a/src/main/resources/esper/driver-working-time-derived-projections.epl
+++ b/src/main/resources/esper/driver-working-time-derived-projections.epl
@@ -288,13 +288,13 @@ create schema DailyWeeklyRestCandidateCoverageEmittedKey(
     endedAtEpochSecond long
 );
 
-@public create context PerDriver partition by driverKey from TachographVehicleUsageIntervalInputEvent;
+@public create context PerDriver partition by driverKey from DriverWorkingTimeVehicleUsageIntervalInputEvent;
 
-@public create window TachographVehicleUsageIntervalInputWindow#keepall as TachographVehicleUsageIntervalInputEvent;
+@public create window DriverWorkingTimeVehicleUsageIntervalInputWindow#keepall as DriverWorkingTimeVehicleUsageIntervalInputEvent;
 
-insert into TachographVehicleUsageIntervalInputWindow
+insert into DriverWorkingTimeVehicleUsageIntervalInputWindow
 select *
-from TachographVehicleUsageIntervalInputEvent;
+from DriverWorkingTimeVehicleUsageIntervalInputEvent;
 
 create schema VuCardAbsentInterval(
     sessionId java.util.UUID,
@@ -481,7 +481,7 @@ select
     longitude,
     odometerKm,
     priority
-from TachographSupportGeoEvidenceInputEvent;
+from DriverWorkingTimeSupportEvidenceInputEvent;
 
 insert into SignificantDrivingInterval
 select
@@ -494,7 +494,7 @@ select
     durationSeconds,
     registrationKey,
     vehicleKey
-from TachographActivityIntervalInputEvent(activityType = 'DRIVE', durationSeconds > ${SIGNIFICANT_DRIVING_THRESHOLD_SECONDS});
+from DriverWorkingTimeActivityIntervalInputEvent(activityType = 'DRIVE', durationSeconds > ${SIGNIFICANT_DRIVING_THRESHOLD_SECONDS});
 
 @public create window PreviousSignificantDrivingInterval#unique(driverKey) as SignificantDrivingInterval;
 
@@ -657,7 +657,7 @@ select
         end
     ) as rankScore
 from DailyWeeklyRestCandidateCoverageCardResolvedInterval as c unidirectional,
-     TachographVehicleUsageIntervalInputWindow as v
+     DriverWorkingTimeVehicleUsageIntervalInputWindow as v
 where v.driverKey = c.driverKey
   and v.odometerBeginKm is not null
   and v.startedAtEpochSecond >= c.startedAtEpochSecond - ${REST_GEO_LOOKBACK_SECONDS}
@@ -704,7 +704,7 @@ select
         end
     ) as rankScore
 from DailyWeeklyRestCandidateCoverageCardResolvedInterval as c unidirectional,
-     TachographVehicleUsageIntervalInputWindow as v
+     DriverWorkingTimeVehicleUsageIntervalInputWindow as v
 where v.driverKey = c.driverKey
   and v.endedAtEpochSecond is not null
   and v.odometerEndKm is not null
@@ -780,7 +780,7 @@ select
         end
     ) as rankScore
 from DailyWeeklyRestCandidateCoverageCardResolvedInterval as c unidirectional,
-     TachographVehicleUsageIntervalInputWindow as v
+     DriverWorkingTimeVehicleUsageIntervalInputWindow as v
 where v.driverKey = c.driverKey
   and v.odometerBeginKm is not null
   and v.startedAtEpochSecond >= c.endedAtEpochSecond - ${REST_GEO_LOOKBACK_SECONDS}
@@ -827,7 +827,7 @@ select
         end
     ) as rankScore
 from DailyWeeklyRestCandidateCoverageCardResolvedInterval as c unidirectional,
-     TachographVehicleUsageIntervalInputWindow as v
+     DriverWorkingTimeVehicleUsageIntervalInputWindow as v
 where v.driverKey = c.driverKey
   and v.endedAtEpochSecond is not null
   and v.odometerEndKm is not null
@@ -1492,11 +1492,11 @@ select
 from DailyWeeklyRestCandidateCoverageInterval;
 
 @public context PerDriver
-create window PreviousVehicleUsageInterval#lastevent as TachographVehicleUsageIntervalInputEvent;
+create window PreviousVehicleUsageInterval#lastevent as DriverWorkingTimeVehicleUsageIntervalInputEvent;
 
 @Priority(30)
 context PerDriver
-on TachographVehicleUsageIntervalInputEvent as next
+on DriverWorkingTimeVehicleUsageIntervalInputEvent as next
 insert into VuCardAbsentInterval
 select
     priorInterval.sessionId as sessionId,
@@ -1517,12 +1517,12 @@ where priorInterval.endedAt is not null
 
 @Priority(20)
 context PerDriver
-on TachographVehicleUsageIntervalInputEvent
+on DriverWorkingTimeVehicleUsageIntervalInputEvent
 delete from PreviousVehicleUsageInterval;
 
 @Priority(10)
 context PerDriver
-on TachographVehicleUsageIntervalInputEvent as current
+on DriverWorkingTimeVehicleUsageIntervalInputEvent as current
 insert into PreviousVehicleUsageInterval
 select *;
 
diff --git a/src/main/resources/esper/runtime-driver-event-interval-preprocessor.epl b/src/main/resources/esper/runtime-driver-event-interval-preprocessor.epl
index cb11eea..e1b3b8d 100644
--- a/src/main/resources/esper/runtime-driver-event-interval-preprocessor.epl
+++ b/src/main/resources/esper/runtime-driver-event-interval-preprocessor.epl
@@ -1,8 +1,8 @@
 /*
  * Source-neutral event-input adapter for driver-working-time-derived-projections.epl.
  *
- * The old bundle consumes resolved interval input streams. This preprocessor lets the same
- * derived rules consume EventHub point events by pairing START/END activity events and
+ * The projection bundle consumes resolved interval input streams. This preprocessor lets the
+ * same derived rules consume EventHub point events by pairing START/END activity events and
  * INSERT/WITHDRAW card-vehicle usage events inside Esper.
  *
  * Vehicle-usage intervals are additionally coalesced in EPL before they are forwarded to
@@ -11,15 +11,15 @@
  * common midnight continuation 23:59:59 -> 00:00:00 on the next day.
  */
 
-create window OpenActivityPoint#unique(driverKey, intervalId) as TachographActivityPointInputEvent;
+create window OpenActivityPoint#unique(driverKey, intervalId) as DriverWorkingTimeActivityPointInputEvent;
 
 insert into OpenActivityPoint
 select *
-from TachographActivityPointInputEvent(lifecycle = 'START');
+from DriverWorkingTimeActivityPointInputEvent(lifecycle = 'START');
 
 @Priority(20)
-on TachographActivityPointInputEvent(lifecycle = 'END') as endEvent
-insert into TachographActivityIntervalInputEvent
+on DriverWorkingTimeActivityPointInputEvent(lifecycle = 'END') as endEvent
+insert into DriverWorkingTimeActivityIntervalInputEvent
 select
     startEvent.sessionId as sessionId,
     startEvent.driverKey as driverKey,
@@ -48,7 +48,7 @@ where startEvent.driverKey = endEvent.driverKey
   and endEvent.occurredAtEpochSecond > startEvent.occurredAtEpochSecond;
 
 @Priority(10)
-on TachographActivityPointInputEvent(lifecycle = 'END') as endEvent
+on DriverWorkingTimeActivityPointInputEvent(lifecycle = 'END') as endEvent
 delete from OpenActivityPoint as openEvent
 where openEvent.driverKey = endEvent.driverKey
   and openEvent.intervalId = endEvent.intervalId;
@@ -72,14 +72,14 @@ create schema RawVehicleUsageInterval(
     sourceIntervalIds java.util.List
 );
 
-create window OpenVehicleUsagePoint#unique(driverKey, intervalId) as TachographVehicleUsagePointInputEvent;
+create window OpenVehicleUsagePoint#unique(driverKey, intervalId) as DriverWorkingTimeVehicleUsagePointInputEvent;
 
 insert into OpenVehicleUsagePoint
 select *
-from TachographVehicleUsagePointInputEvent(lifecycle = 'INSERT');
+from DriverWorkingTimeVehicleUsagePointInputEvent(lifecycle = 'INSERT');
 
 @Priority(20)
-on TachographVehicleUsagePointInputEvent(lifecycle = 'WITHDRAW') as withdrawEvent
+on DriverWorkingTimeVehicleUsagePointInputEvent(lifecycle = 'WITHDRAW') as withdrawEvent
 insert into RawVehicleUsageInterval
 select
     insertEvent.sessionId as sessionId,
@@ -104,7 +104,7 @@ where insertEvent.driverKey = withdrawEvent.driverKey
   and withdrawEvent.occurredAtEpochSecond > insertEvent.occurredAtEpochSecond;
 
 @Priority(10)
-on TachographVehicleUsagePointInputEvent(lifecycle = 'WITHDRAW') as withdrawEvent
+on DriverWorkingTimeVehicleUsagePointInputEvent(lifecycle = 'WITHDRAW') as withdrawEvent
 delete from OpenVehicleUsagePoint as openEvent
 where openEvent.driverKey = withdrawEvent.driverKey
   and openEvent.intervalId = withdrawEvent.intervalId;
@@ -192,7 +192,7 @@ where current.driverKey = next.driverKey
  */
 @Priority(70)
 on RawVehicleUsageInterval as next
-insert into TachographVehicleUsageIntervalInputEvent
+insert into DriverWorkingTimeVehicleUsageIntervalInputEvent
 select
     current.sessionId as sessionId,
     current.driverKey as driverKey,
@@ -316,12 +316,12 @@ where candidate.driverKey = next.driverKey;
 
 /*
  * The last accumulated interval cannot be emitted by looking at the next interval, so Java
- * sends one TachographProjectionFinalizeEvent per driver after all vehicle-usage point
+ * sends one DriverWorkingTimeProjectionFinalizeEvent per driver after all vehicle-usage point
  * events and before activity point events.
  */
 @Priority(20)
-on TachographProjectionFinalizeEvent as finalizeEvent
-insert into TachographVehicleUsageIntervalInputEvent
+on DriverWorkingTimeProjectionFinalizeEvent as finalizeEvent
+insert into DriverWorkingTimeVehicleUsageIntervalInputEvent
 select
     current.sessionId as sessionId,
     current.driverKey as driverKey,
@@ -343,6 +343,6 @@ from MergedVehicleUsageAccumulator as current
 where current.driverKey = finalizeEvent.driverKey;
 
 @Priority(10)
-on TachographProjectionFinalizeEvent as finalizeEvent
+on DriverWorkingTimeProjectionFinalizeEvent as finalizeEvent
 delete from MergedVehicleUsageAccumulator as current
 where current.driverKey = finalizeEvent.driverKey;
diff --git a/src/test/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilderTest.java b/src/test/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilderTest.java
index 987d389..1ba8df4 100644
--- a/src/test/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilderTest.java
+++ b/src/test/java/at/procon/eventhub/processing/driverworkingtime/service/DriverWorkingTimeReusableProjectionBuilderTest.java
@@ -3,6 +3,7 @@ package at.procon.eventhub.processing.driverworkingtime.service;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import at.procon.eventhub.config.EventHubProperties;
+import at.procon.eventhub.processing.driverworkingtime.esper.DriverWorkingTimeEsperContractNames;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeActivityInterval;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeDerivedProjectionBundle;
 import at.procon.eventhub.processing.driverworkingtime.model.DriverWorkingTimeProcessingInput;
@@ -22,6 +23,42 @@ import org.junit.jupiter.api.Test;
 
 class DriverWorkingTimeReusableProjectionBuilderTest {
 
+    @Test
+    void commonEplUsesSourceNeutralDriverWorkingTimeInputContracts() throws IOException {
+        String projectionEpl = StreamUtils.copyToString(
+                new ClassPathResource("esper/driver-working-time-derived-projections.epl").getInputStream(),
+                StandardCharsets.UTF_8
+        );
+        String preprocessorEpl = StreamUtils.copyToString(
+                new ClassPathResource("esper/runtime-driver-event-interval-preprocessor.epl").getInputStream(),
+                StandardCharsets.UTF_8
+        );
+
+        assertThat(projectionEpl)
+                .contains(DriverWorkingTimeEsperContractNames.ACTIVITY_INTERVAL_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.SUPPORT_EVIDENCE_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_WINDOW)
+                .doesNotContain("TachographActivityIntervalInputEvent")
+                .doesNotContain("TachographVehicleUsageIntervalInputEvent")
+                .doesNotContain("TachographSupportGeoEvidenceInputEvent")
+                .doesNotContain("TachographVehicleUsageIntervalInputWindow");
+
+        assertThat(preprocessorEpl)
+                .contains(DriverWorkingTimeEsperContractNames.ACTIVITY_POINT_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_POINT_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.ACTIVITY_INTERVAL_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_EVENT_TYPE)
+                .contains(DriverWorkingTimeEsperContractNames.PROJECTION_FINALIZE_EVENT_TYPE)
+                .doesNotContain("TachographActivityPointInputEvent")
+                .doesNotContain("TachographVehicleUsagePointInputEvent")
+                .doesNotContain("TachographProjectionFinalizeEvent");
+
+        assertThat(DriverWorkingTimeReusableProjectionBuilder.REUSABLE_RUNTIME_STATE_CLEANUP_QUERIES)
+                .contains("delete from "
+                        + DriverWorkingTimeEsperContractNames.VEHICLE_USAGE_INTERVAL_INPUT_WINDOW);
+    }
+
     @Test
     void reusesWarmRuntimeWithoutLeakingPreviousState() {
         DriverWorkingTimeReusableProjectionBuilder builder =