diff --git a/testing-framework/deployers/compose/src/deployer/orchestrator.rs b/testing-framework/deployers/compose/src/deployer/orchestrator.rs
index e8ae1eb..3025eaf 100644
--- a/testing-framework/deployers/compose/src/deployer/orchestrator.rs
+++ b/testing-framework/deployers/compose/src/deployer/orchestrator.rs
@@ -5,9 +5,9 @@ use testing_framework_core::{
     scenario::{
         ApplicationExternalProvider, CleanupGuard, ClusterWaitHandle, DeploymentPolicy, FeedHandle,
         FeedRuntime, HttpReadinessRequirement, Metrics, NodeClients, NodeControlHandle,
-        ObservabilityCapabilityProvider, ObservabilityInputs, RequiresNodeControl, RunContext,
-        Runner, RuntimeAssembly, Scenario, SourceOrchestrationPlan, SourceProviders,
-        StaticManagedProvider, build_source_orchestration_plan, orchestrate_sources_with_providers,
+        ObservabilityCapabilityProvider, ObservabilityInputs, RequiresNodeControl, Runner,
+        RuntimeAssembly, Scenario, SourceOrchestrationPlan, SourceProviders, StaticManagedProvider,
+        build_source_orchestration_plan, orchestrate_sources_with_providers,
     },
     topology::DeploymentDescriptor,
 };
@@ -157,7 +157,7 @@ impl<E: ComposeDeployEnv> DeploymentOrchestrator<E> {
         let node_control = self.attached_node_control::<Caps>(scenario)?;
         let cluster_wait = self.attached_cluster_wait(scenario)?;
         let (feed, feed_task) = spawn_block_feed_with_retry::<E>(&node_clients).await?;
-        let context = build_run_context(
+        let assembly = build_runtime_assembly(
             scenario.deployment().clone(),
             node_clients,
             scenario.duration(),
@@ -169,7 +169,7 @@ impl<E: ComposeDeployEnv> DeploymentOrchestrator<E> {
         );
 
         let cleanup_guard: Box<dyn CleanupGuard> = Box::new(feed_task);
-        Ok(RuntimeAssembly::from(context).build_runner(Some(cleanup_guard)))
+        Ok(assembly.build_runner(Some(cleanup_guard)))
     }
 
     fn source_providers(&self, managed_clients: Vec<E::NodeClient>) -> SourceProviders<E> {
@@ -283,7 +283,7 @@ impl<E: ComposeDeployEnv> DeploymentOrchestrator<E> {
             "compose runtime prepared"
         );
 
-        Ok(RuntimeAssembly::from(runtime.context).build_runner(Some(cleanup_guard)))
+        Ok(runtime.assembly.build_runner(Some(cleanup_guard)))
     }
 
     fn maybe_node_control<Caps>(
@@ -379,7 +379,7 @@ struct DeployedNodes<E: ComposeDeployEnv> {
 }
 
 struct ComposeRuntime<E: ComposeDeployEnv> {
-    context: RunContext<E>,
+    assembly: RuntimeAssembly<E>,
     feed_task: FeedHandle,
 }
 
@@ -408,7 +408,7 @@ async fn build_compose_runtime<E: ComposeDeployEnv>(
         .start_block_feed(&node_clients, input.environment)
         .await?;
 
-    let context = build_run_context(
+    let assembly = build_runtime_assembly(
         input.descriptors,
         node_clients,
         input.duration,
@@ -419,7 +419,10 @@ async fn build_compose_runtime<E: ComposeDeployEnv>(
         input.cluster_wait,
     );
 
-    Ok(ComposeRuntime { context, feed_task })
+    Ok(ComposeRuntime {
+        assembly,
+        feed_task,
+    })
 }
 
 async fn deploy_nodes<E: ComposeDeployEnv>(
@@ -452,7 +455,7 @@ async fn deploy_nodes<E: ComposeDeployEnv>(
     })
 }
 
-fn build_run_context<E: ComposeDeployEnv>(
+fn build_runtime_assembly<E: ComposeDeployEnv>(
     descriptors: E::Deployment,
     node_clients: NodeClients<E>,
     run_duration: Duration,
@@ -461,7 +464,7 @@ fn build_run_context<E: ComposeDeployEnv>(
     feed: <E::FeedRuntime as FeedRuntime>::Feed,
     node_control: Option<Arc<dyn NodeControlHandle<E>>>,
     cluster_wait: Arc<dyn ClusterWaitHandle<E>>,
-) -> RunContext<E> {
+) -> RuntimeAssembly<E> {
     let mut assembly = RuntimeAssembly::new(
         descriptors,
         node_clients,
@@ -476,7 +479,7 @@ fn build_run_context<E: ComposeDeployEnv>(
         assembly = assembly.with_node_control(node_control);
     }
 
-    assembly.build_context()
+    assembly
 }
 
 fn resolve_observability_inputs<E, Caps>(
diff --git a/testing-framework/deployers/k8s/src/deployer/orchestrator.rs b/testing-framework/deployers/k8s/src/deployer/orchestrator.rs
index 23b9bc8..f685a7d 100644
--- a/testing-framework/deployers/k8s/src/deployer/orchestrator.rs
+++ b/testing-framework/deployers/k8s/src/deployer/orchestrator.rs
@@ -8,7 +8,7 @@ use testing_framework_core::{
         Application, ApplicationExternalProvider, CleanupGuard, ClusterWaitHandle, Deployer,
         DynError, FeedHandle, FeedRuntime, HttpReadinessRequirement, Metrics, MetricsError,
         NodeClients, ObservabilityCapabilityProvider, ObservabilityInputs, RequiresNodeControl,
-        RunContext, Runner, RuntimeAssembly, Scenario, SourceOrchestrationPlan, SourceProviders,
+        Runner, RuntimeAssembly, Scenario, SourceOrchestrationPlan, SourceProviders,
         StaticManagedProvider, build_source_orchestration_plan, orchestrate_sources_with_providers,
     },
     topology::DeploymentDescriptor,
@@ -204,10 +204,10 @@ where
     runtime.node_clients = resolve_node_clients(&source_plan, source_providers).await?;
     ensure_non_empty_node_clients(&runtime.node_clients)?;
 
-    let parts = build_runner_parts(scenario, deployment.node_count, runtime, cluster_wait);
-
     log_configured_observability(&observability);
-    maybe_print_endpoints::<E>(&observability, &parts.node_clients);
+    maybe_print_endpoints::<E>(&observability, &runtime.node_clients);
+
+    let parts = build_runner_parts(scenario, deployment.node_count, runtime, cluster_wait);
     let runner = finalize_runner::<E>(&mut cluster, parts)?;
     Ok((runner, metadata))
 }
@@ -497,15 +497,18 @@ fn build_runner_parts<E: K8sDeployEnv, Caps>(
     cluster_wait: Arc<dyn ClusterWaitHandle<E>>,
 ) -> K8sRunnerParts<E> {
     K8sRunnerParts {
-        descriptors: scenario.deployment().clone(),
-        node_clients: runtime.node_clients,
-        duration: scenario.duration(),
-        expectation_cooldown: scenario.expectation_cooldown(),
-        telemetry: runtime.telemetry,
-        feed: runtime.feed,
+        assembly: build_k8s_runtime_assembly(
+            scenario.deployment().clone(),
+            runtime.node_clients,
+            scenario.duration(),
+            scenario.expectation_cooldown(),
+            runtime.telemetry,
+            runtime.feed,
+            cluster_wait,
+        ),
         feed_task: runtime.feed_task,
         node_count,
-        cluster_wait,
+        duration_secs: scenario.duration().as_secs(),
     }
 }
 
@@ -593,15 +596,10 @@ fn maybe_print_endpoints<E: K8sDeployEnv>(
 }
 
 struct K8sRunnerParts<E: K8sDeployEnv> {
-    descriptors: E::Deployment,
-    node_clients: NodeClients<E>,
-    duration: Duration,
-    expectation_cooldown: Duration,
-    telemetry: Metrics,
-    feed: Feed<E>,
+    assembly: RuntimeAssembly<E>,
     feed_task: FeedHandle,
     node_count: usize,
-    cluster_wait: Arc<dyn ClusterWaitHandle<E>>,
+    duration_secs: u64,
 }
 
 fn finalize_runner<E: K8sDeployEnv>(
@@ -612,36 +610,21 @@ fn finalize_runner<E: K8sDeployEnv>(
     let (cleanup, port_forwards) = environment.into_cleanup()?;
 
     let K8sRunnerParts {
-        descriptors,
-        node_clients,
-        duration,
-        expectation_cooldown,
-        telemetry,
-        feed,
+        assembly,
         feed_task,
         node_count,
-        cluster_wait,
+        duration_secs,
     } = parts;
-    let duration_secs = duration.as_secs();
 
     let cleanup_guard: Box<dyn CleanupGuard> =
         Box::new(K8sCleanupGuard::new(cleanup, feed_task, port_forwards));
-    let context = build_k8s_run_context(
-        descriptors,
-        node_clients,
-        duration,
-        expectation_cooldown,
-        telemetry,
-        feed,
-        cluster_wait,
-    );
 
     info!(
         nodes = node_count,
         duration_secs, "k8s deployment ready; handing control to scenario runner"
     );
 
-    Ok(RuntimeAssembly::from(context).build_runner(Some(cleanup_guard)))
+    Ok(assembly.build_runner(Some(cleanup_guard)))
 }
 
 fn take_ready_cluster(
@@ -654,7 +637,7 @@ fn take_ready_cluster(
         })
 }
 
-fn build_k8s_run_context<E: K8sDeployEnv>(
+fn build_k8s_runtime_assembly<E: K8sDeployEnv>(
     descriptors: E::Deployment,
     node_clients: NodeClients<E>,
     duration: Duration,
@@ -662,7 +645,7 @@ fn build_k8s_run_context<E: K8sDeployEnv>(
     telemetry: Metrics,
     feed: Feed<E>,
     cluster_wait: Arc<dyn ClusterWaitHandle<E>>,
-) -> RunContext<E> {
+) -> RuntimeAssembly<E> {
     RuntimeAssembly::new(
         descriptors,
         node_clients,
@@ -672,7 +655,6 @@ fn build_k8s_run_context<E: K8sDeployEnv>(
         feed,
     )
     .with_cluster_wait(cluster_wait)
-    .build_context()
 }
 
 fn endpoint_or_disabled(endpoint: Option<&Url>) -> String {
diff --git a/testing-framework/deployers/local/src/deployer/orchestrator.rs b/testing-framework/deployers/local/src/deployer/orchestrator.rs
index bf93859..f931e8b 100644
--- a/testing-framework/deployers/local/src/deployer/orchestrator.rs
+++ b/testing-framework/deployers/local/src/deployer/orchestrator.rs
@@ -12,8 +12,8 @@ use testing_framework_core::{
     scenario::{
         Application, CleanupGuard, Deployer, DeploymentPolicy, DynError, FeedHandle, FeedRuntime,
         HttpReadinessRequirement, Metrics, NodeClients, NodeControlCapability, NodeControlHandle,
-        RetryPolicy, RunContext, Runner, RuntimeAssembly, Scenario, ScenarioError,
-        SourceOrchestrationPlan, build_source_orchestration_plan, spawn_feed,
+        RetryPolicy, Runner, RuntimeAssembly, Scenario, ScenarioError, SourceOrchestrationPlan,
+        build_source_orchestration_plan, spawn_feed,
     },
     topology::DeploymentDescriptor,
 };
@@ -218,7 +218,7 @@ impl<E: LocalDeployerEnv> ProcessDeployer<E> {
         let cleanup_guard: Box<dyn CleanupGuard> =
             Box::new(LocalProcessGuard::<E>::new(nodes, runtime.feed_task));
 
-        Ok(RuntimeAssembly::from(runtime.context).build_runner(Some(cleanup_guard)))
+        Ok(runtime.assembly.build_runner(Some(cleanup_guard)))
     }
 
     async fn deploy_with_node_control(
@@ -252,7 +252,9 @@ impl<E: LocalDeployerEnv> ProcessDeployer<E> {
         )
         .await?;
 
-        Ok(RuntimeAssembly::from(runtime.context).build_runner(Some(Box::new(runtime.feed_task))))
+        Ok(runtime
+            .assembly
+            .build_runner(Some(Box::new(runtime.feed_task))))
     }
 
     fn node_control_from(
@@ -472,7 +474,7 @@ fn log_local_deploy_start(node_count: usize, policy: DeploymentPolicy, has_node_
 }
 
 struct RuntimeContext<E: Application> {
-    context: RunContext<E>,
+    assembly: RuntimeAssembly<E>,
     feed_task: FeedHandle,
 }
 
@@ -500,7 +502,8 @@ async fn run_context_for<E: Application>(
         assembly = assembly.with_node_control(node_control);
     }
 
-    let context = assembly.build_context();
-
-    Ok(RuntimeContext { context, feed_task })
+    Ok(RuntimeContext {
+        assembly,
+        feed_task,
+    })
 }