diff --git a/go.mod b/go.mod
index 2e1c128..a234bb8 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ toolchain go1.26.5
 
 require (
 	github.com/jackc/pgx/v5 v5.10.0
-	github.com/spice-framework/spice v0.0.0-20260805222830-a2ecd56df246
+	github.com/spice-framework/spice v0.1.0-preview.4
 )
 
 require (
diff --git a/go.sum b/go.sum
index 3beb183..0ee83ce 100644
--- a/go.sum
+++ b/go.sum
@@ -13,8 +13,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/spice-framework/development v0.0.0-20260806132124-4c308d1b9fda h1:2NwMsYJ6BqeA5johEh5gXxqEyf5RoVsKZyNH4AMR4Yo=
 github.com/spice-framework/development v0.0.0-20260806132124-4c308d1b9fda/go.mod h1:0lIxjVtv+p4iTrvLJm05OjimS2MSrIqM1xPR7Q0GHEg=
-github.com/spice-framework/spice v0.0.0-20260805222830-a2ecd56df246 h1:IAPcr8bmwyeNQWME5bUWg/NvDVGoBJY+TRumFXMPXR8=
-github.com/spice-framework/spice v0.0.0-20260805222830-a2ecd56df246/go.mod h1:dBZV5UZcbY6pzhfGNtvAwQIJ8YsFna+jf1SAlmukJfk=
+github.com/spice-framework/spice v0.1.0-preview.4 h1:jfUSUquq9rQN/FMI6zvBEJZYX12ZVeJAQmusvjy/3T8=
+github.com/spice-framework/spice v0.1.0-preview.4/go.mod h1:dBZV5UZcbY6pzhfGNtvAwQIJ8YsFna+jf1SAlmukJfk=
 github.com/spice-framework/toolchain v0.0.0-20260806133530-71211498297c h1:US3ChgXYhIXFZ5VNYQ2BjuiTbStVNEyC1cBjxN3SCXM=
 github.com/spice-framework/toolchain v0.0.0-20260806133530-71211498297c/go.mod h1:/U0xhEiz4xGpiCCS560gjgDiixDh5lR4NXVbVPmrmh8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
diff --git a/vendor/github.com/spice-framework/spice/data/transaction.go b/vendor/github.com/spice-framework/spice/data/transaction.go
index e29b5f4..65f4834 100644
--- a/vendor/github.com/spice-framework/spice/data/transaction.go
+++ b/vendor/github.com/spice-framework/spice/data/transaction.go
@@ -27,6 +27,21 @@ type Executor interface {
 	QueryRowContext(context.Context, string, ...any) *sql.Row
 }
 
+type executorContextKey struct{}
+
+// ExecutorFromContext returns the transaction-owned executor installed by
+// Manager.Within. Generated service decorators use this explicit accessor so
+// repository implementations can participate without receiving a transaction
+// parameter through every service method. It returns false outside a managed
+// transaction.
+func ExecutorFromContext(ctx context.Context) (Executor, bool) {
+	if ctx == nil {
+		return nil, false
+	}
+	executor, ok := ctx.Value(executorContextKey{}).(Executor)
+	return executor, ok && executor != nil
+}
+
 // Definition is compiler-owned metadata for one transaction boundary.
 type Definition struct {
 	ID        string
@@ -128,7 +143,12 @@ func (manager *Manager) Within(
 		panic(recovered)
 	}()
 
-	if err := work(observedContext, tx); err != nil {
+	transactionContext := context.WithValue(
+		observedContext,
+		executorContextKey{},
+		Executor(tx),
+	)
+	if err := work(transactionContext, tx); err != nil {
 		workErr := fmt.Errorf("execute transaction %q: %w", definition.ID, err)
 		resultErr = errors.Join(workErr, rollback(tx, definition.ID))
 		finish(Result{Definition: definition, Duration: time.Since(started), Err: resultErr})
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 0175a15..2d7fc8c 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -33,7 +33,7 @@ github.com/spice-framework/development/internal/libraryrelease
 github.com/spice-framework/development/internal/process
 github.com/spice-framework/development/internal/verify
 github.com/spice-framework/development/internal/workspace
-# github.com/spice-framework/spice v0.0.0-20260805222830-a2ecd56df246
+# github.com/spice-framework/spice v0.1.0-preview.4
 ## explicit; go 1.26.0
 github.com/spice-framework/spice/annotation
 github.com/spice-framework/spice/annotation/sdk/starter