diff --git a/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Bijection.kt b/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Bijection.kt
index 0a1b0f65..a6a81291 100644
--- a/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Bijection.kt
+++ b/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Bijection.kt
@@ -9,6 +9,9 @@ class Bijection<A, B>(val underlying: dev.typr.foundations.Bijection<A, B>) {
     fun inverse(): Bijection<B, A> = Bijection(underlying.inverse())
 
     companion object {
+        fun <A, B> of(forward: (A) -> B, backward: (B) -> A): Bijection<A, B> =
+            Bijection(dev.typr.foundations.Bijection.of(forward, backward))
+
         internal fun <T> optionalToNullable(): dev.typr.foundations.Bijection<Optional<T>, T?> =
             dev.typr.foundations.Bijection.optionalToNullable<T>()
 
diff --git a/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Connection.kt b/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Connection.kt
index 0f724e68..6b3e4e39 100644
--- a/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Connection.kt
+++ b/foundations-jdbc-kotlin/src/kotlin/dev/typr/foundationskt/Connection.kt
@@ -15,7 +15,7 @@ open class ConnectionRead(val underlying: dev.typr.foundations.ConnectionRead) {
 
 class Connection(private val java: dev.typr.foundations.Connection) : ConnectionRead(java) {
 
-    internal val javaConnection: dev.typr.foundations.Connection get() = java
+    val javaConnection: dev.typr.foundations.Connection get() = java
 
     fun <T> execute(op: Operation<T>): T =
         java.execute(op.underlying)
diff --git a/foundations-jdbc/src/java/dev/typr/foundations/OperationRead.java b/foundations-jdbc/src/java/dev/typr/foundations/OperationRead.java
index abdc24a5..e27920f0 100644
--- a/foundations-jdbc/src/java/dev/typr/foundations/OperationRead.java
+++ b/foundations-jdbc/src/java/dev/typr/foundations/OperationRead.java
@@ -17,11 +17,24 @@ public sealed interface OperationRead<Out> extends Operation<Out>
         OperationRead.Then,
         OperationRead.Configured {
 
-  /** Run this read operation on the given read connection. */
+  /** Run this read operation on a read-only connection. */
   default Out run(ConnectionRead conn) {
     return conn.execute(this);
   }
 
+  /**
+   * Re-declares the inherited {@link Operation#run(Connection)} on this trait so Scala 3's
+   * overload resolver sees both {@code run(Connection)} and {@code run(ConnectionRead)} declared
+   * at the same level — then specificity ({@code Connection <: ConnectionRead}) picks the more
+   * specific overload for {@code c: Connection} call sites without ambiguity. Java and Kotlin
+   * always picked the most-specific overload regardless; this redeclaration is purely for the
+   * Scala 3 overload resolver. Pure delegation; same body as the inherited default.
+   */
+  @Override
+  default Out run(Connection conn) {
+    return conn.execute(this);
+  }
+
   /**
    * Execute this operation using the given transactor.
    *