diff --git a/internal/pluginhost/adapters_test.go b/internal/pluginhost/adapters_test.go
index de62918e..302b1f38 100644
--- a/internal/pluginhost/adapters_test.go
+++ b/internal/pluginhost/adapters_test.go
@@ -2234,6 +2234,39 @@ func TestUsageAdapterPanicFusesPlugin(t *testing.T) {
 	}
 }
 
+func TestUsageAdapterDetachesCanceledRequestContext(t *testing.T) {
+	type contextKey struct{}
+	const contextValue = "usage-context-value"
+
+	called := 0
+	plugin := usagePluginFunc(func(ctx context.Context, record pluginapi.UsageRecord) {
+		called++
+		if errContext := ctx.Err(); errContext != nil {
+			t.Fatalf("usage context error = %v, want nil", errContext)
+		}
+		if value := ctx.Value(contextKey{}); value != contextValue {
+			t.Fatalf("usage context value = %v, want %q", value, contextValue)
+		}
+	})
+	host := newHostWithRecords(capabilityRecord{
+		id: "usage-canceled-context",
+		plugin: pluginapi.Plugin{Capabilities: pluginapi.Capabilities{
+			UsagePlugin: plugin,
+		}},
+	})
+	adapter := &usageAdapter{
+		host:     host,
+		pluginID: "usage-canceled-context",
+	}
+
+	ctx, cancel := context.WithCancel(context.WithValue(context.Background(), contextKey{}, contextValue))
+	cancel()
+	adapter.HandleUsage(ctx, coreusage.Record{Provider: "plugin-provider"})
+	if called != 1 {
+		t.Fatalf("usage plugin calls = %d, want 1", called)
+	}
+}
+
 func TestUsageAdapterNormalizesOmittedGenerateToTrue(t *testing.T) {
 	var gotGenerate bool
 	plugin := usagePluginFunc(func(ctx context.Context, record pluginapi.UsageRecord) {
diff --git a/internal/pluginhost/adapters_usage_translation.go b/internal/pluginhost/adapters_usage_translation.go
index 2201eb6c..93a4c8a5 100644
--- a/internal/pluginhost/adapters_usage_translation.go
+++ b/internal/pluginhost/adapters_usage_translation.go
@@ -132,6 +132,11 @@ func (a *usageAdapter) HandleUsage(ctx context.Context, record coreusage.Record)
 	if a == nil {
 		return
 	}
+	if ctx == nil {
+		ctx = context.Background()
+	} else {
+		ctx = context.WithoutCancel(ctx)
+	}
 	plugin := a.host.currentUsagePlugin(a.pluginID)
 	if plugin == nil {
 		return