diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/AnyEvaluator.java b/src/main/java/build/buf/protovalidate/AnyEvaluator.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/AnyEvaluator.java
rename to src/main/java/build/buf/protovalidate/AnyEvaluator.java
index 0a881c69..a93777ff 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/AnyEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/AnyEvaluator.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.AnyRules;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
diff --git a/src/main/java/build/buf/protovalidate/internal/expression/AstExpression.java b/src/main/java/build/buf/protovalidate/AstExpression.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/expression/AstExpression.java
rename to src/main/java/build/buf/protovalidate/AstExpression.java
index fba764b6..24cce494 100644
--- a/src/main/java/build/buf/protovalidate/internal/expression/AstExpression.java
+++ b/src/main/java/build/buf/protovalidate/AstExpression.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.expression;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.CompilationException;
 import com.google.api.expr.v1alpha1.Type;
@@ -20,7 +20,7 @@
 import org.projectnessie.cel.Env;
 
 /** {@link AstExpression} is a compiled CEL {@link Ast}. */
-public class AstExpression {
+class AstExpression {
   /** The compiled CEL AST. */
   public final Ast ast;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/CelPrograms.java b/src/main/java/build/buf/protovalidate/CelPrograms.java
similarity index 87%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/CelPrograms.java
rename to src/main/java/build/buf/protovalidate/CelPrograms.java
index 4927b8af..a3df4ed6 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/CelPrograms.java
+++ b/src/main/java/build/buf/protovalidate/CelPrograms.java
@@ -12,13 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
-import build.buf.protovalidate.internal.expression.CompiledProgram;
-import build.buf.protovalidate.internal.expression.Variable;
 import java.util.ArrayList;
 import java.util.List;
 import javax.annotation.Nullable;
diff --git a/src/main/java/build/buf/protovalidate/internal/expression/CompiledProgram.java b/src/main/java/build/buf/protovalidate/CompiledProgram.java
similarity index 95%
rename from src/main/java/build/buf/protovalidate/internal/expression/CompiledProgram.java
rename to src/main/java/build/buf/protovalidate/CompiledProgram.java
index afb594e6..fa1c68a8 100644
--- a/src/main/java/build/buf/protovalidate/internal/expression/CompiledProgram.java
+++ b/src/main/java/build/buf/protovalidate/CompiledProgram.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.expression;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.evaluator.Value;
 import build.buf.validate.FieldPath;
 import javax.annotation.Nullable;
 import org.projectnessie.cel.Program;
@@ -27,7 +25,7 @@
  * {@link CompiledProgram} is a parsed and type-checked {@link Program} along with the source {@link
  * Expression}.
  */
-public class CompiledProgram {
+class CompiledProgram {
   /** A compiled CEL program that can be evaluated against a set of variable bindings. */
   private final Program program;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/constraints/ConstraintCache.java b/src/main/java/build/buf/protovalidate/ConstraintCache.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/constraints/ConstraintCache.java
rename to src/main/java/build/buf/protovalidate/ConstraintCache.java
index 2a4a8435..708019f2 100644
--- a/src/main/java/build/buf/protovalidate/internal/constraints/ConstraintCache.java
+++ b/src/main/java/build/buf/protovalidate/ConstraintCache.java
@@ -12,17 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.constraints;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.Config;
 import build.buf.protovalidate.exceptions.CompilationException;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
-import build.buf.protovalidate.internal.evaluator.ObjectValue;
-import build.buf.protovalidate.internal.evaluator.Value;
-import build.buf.protovalidate.internal.expression.AstExpression;
-import build.buf.protovalidate.internal.expression.CompiledProgram;
-import build.buf.protovalidate.internal.expression.Expression;
-import build.buf.protovalidate.internal.expression.Variable;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import build.buf.validate.ValidateProto;
@@ -52,7 +44,7 @@
 import org.projectnessie.cel.interpreter.Activation;
 
 /** A build-through cache for computed standard constraints. */
-public class ConstraintCache {
+class ConstraintCache {
   private static class CelRule {
     public final AstExpression astExpression;
     public final FieldDescriptor field;
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintResolver.java b/src/main/java/build/buf/protovalidate/ConstraintResolver.java
similarity index 99%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintResolver.java
rename to src/main/java/build/buf/protovalidate/ConstraintResolver.java
index b94cfb8e..ffe6bf0e 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintResolver.java
+++ b/src/main/java/build/buf/protovalidate/ConstraintResolver.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.CompilationException;
 import build.buf.validate.FieldConstraints;
diff --git a/src/main/java/build/buf/protovalidate/internal/errors/ConstraintViolation.java b/src/main/java/build/buf/protovalidate/ConstraintViolation.java
similarity index 97%
rename from src/main/java/build/buf/protovalidate/internal/errors/ConstraintViolation.java
rename to src/main/java/build/buf/protovalidate/ConstraintViolation.java
index 711b012b..3687d28a 100644
--- a/src/main/java/build/buf/protovalidate/internal/errors/ConstraintViolation.java
+++ b/src/main/java/build/buf/protovalidate/ConstraintViolation.java
@@ -12,10 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.errors;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.Violation;
-import build.buf.protovalidate.internal.evaluator.Value;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
 import com.google.protobuf.Descriptors;
@@ -31,7 +29,7 @@
  * {@link ConstraintViolation} contains all of the collected information about an individual
  * constraint violation.
  */
-public class ConstraintViolation implements Violation {
+class ConstraintViolation implements Violation {
   /** Static value to return when there are no violations. */
   public static final List<Builder> NO_VIOLATIONS = new ArrayList<>();
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintViolationHelper.java b/src/main/java/build/buf/protovalidate/ConstraintViolationHelper.java
similarity index 94%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintViolationHelper.java
rename to src/main/java/build/buf/protovalidate/ConstraintViolationHelper.java
index 7abcee01..2a9b4943 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/ConstraintViolationHelper.java
+++ b/src/main/java/build/buf/protovalidate/ConstraintViolationHelper.java
@@ -12,9 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
 import java.util.ArrayList;
diff --git a/src/main/java/build/buf/protovalidate/internal/celext/CustomDeclarations.java b/src/main/java/build/buf/protovalidate/CustomDeclarations.java
similarity index 99%
rename from src/main/java/build/buf/protovalidate/internal/celext/CustomDeclarations.java
rename to src/main/java/build/buf/protovalidate/CustomDeclarations.java
index 0ab6a3b2..5c7310fc 100644
--- a/src/main/java/build/buf/protovalidate/internal/celext/CustomDeclarations.java
+++ b/src/main/java/build/buf/protovalidate/CustomDeclarations.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
 import com.google.api.expr.v1alpha1.Decl;
 import java.util.ArrayList;
diff --git a/src/main/java/build/buf/protovalidate/internal/celext/CustomOverload.java b/src/main/java/build/buf/protovalidate/CustomOverload.java
similarity index 99%
rename from src/main/java/build/buf/protovalidate/internal/celext/CustomOverload.java
rename to src/main/java/build/buf/protovalidate/CustomOverload.java
index 34b980c1..f69d59ee 100644
--- a/src/main/java/build/buf/protovalidate/internal/celext/CustomOverload.java
+++ b/src/main/java/build/buf/protovalidate/CustomOverload.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
 import com.google.common.base.Ascii;
 import com.google.common.base.Splitter;
diff --git a/src/main/java/build/buf/protovalidate/internal/constraints/DescriptorMappings.java b/src/main/java/build/buf/protovalidate/DescriptorMappings.java
similarity index 99%
rename from src/main/java/build/buf/protovalidate/internal/constraints/DescriptorMappings.java
rename to src/main/java/build/buf/protovalidate/DescriptorMappings.java
index c444d2ee..d6f33497 100644
--- a/src/main/java/build/buf/protovalidate/internal/constraints/DescriptorMappings.java
+++ b/src/main/java/build/buf/protovalidate/DescriptorMappings.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.constraints;
+package build.buf.protovalidate;
 
 import build.buf.validate.FieldConstraints;
 import com.google.api.expr.v1alpha1.Type;
@@ -27,7 +27,7 @@
 /**
  * DescriptorMappings provides mappings between protocol buffer descriptors and CEL declarations.
  */
-public final class DescriptorMappings {
+final class DescriptorMappings {
   /** Provides a {@link Descriptor} for {@link FieldConstraints}. */
   static final Descriptor FIELD_CONSTRAINTS_DESC = FieldConstraints.getDescriptor();
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/EmbeddedMessageEvaluator.java b/src/main/java/build/buf/protovalidate/EmbeddedMessageEvaluator.java
similarity index 88%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/EmbeddedMessageEvaluator.java
rename to src/main/java/build/buf/protovalidate/EmbeddedMessageEvaluator.java
index 0911ed20..297688e8 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/EmbeddedMessageEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/EmbeddedMessageEvaluator.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import java.util.Collections;
 import java.util.List;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/EnumEvaluator.java b/src/main/java/build/buf/protovalidate/EnumEvaluator.java
similarity index 94%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/EnumEvaluator.java
rename to src/main/java/build/buf/protovalidate/EnumEvaluator.java
index 3ab433f4..ec588d82 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/EnumEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/EnumEvaluator.java
@@ -12,12 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.ValidationResult;
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.EnumRules;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/Evaluator.java b/src/main/java/build/buf/protovalidate/Evaluator.java
similarity index 91%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/Evaluator.java
rename to src/main/java/build/buf/protovalidate/Evaluator.java
index 6c1e4802..bb30a83c 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/Evaluator.java
+++ b/src/main/java/build/buf/protovalidate/Evaluator.java
@@ -12,17 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
 import java.util.List;
 
 /**
  * {@link Evaluator} defines a validation evaluator. evaluator implementations may elide type
  * checking of the passed in value, as the types have been guaranteed during the build phase.
  */
-public interface Evaluator {
+interface Evaluator {
   /**
    * Tautology returns true if the evaluator always succeeds.
    *
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/EvaluatorBuilder.java b/src/main/java/build/buf/protovalidate/EvaluatorBuilder.java
similarity index 97%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/EvaluatorBuilder.java
rename to src/main/java/build/buf/protovalidate/EvaluatorBuilder.java
index f421255c..94dc09c3 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/EvaluatorBuilder.java
+++ b/src/main/java/build/buf/protovalidate/EvaluatorBuilder.java
@@ -12,17 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.Config;
 import build.buf.protovalidate.exceptions.CompilationException;
-import build.buf.protovalidate.internal.constraints.ConstraintCache;
-import build.buf.protovalidate.internal.constraints.DescriptorMappings;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
-import build.buf.protovalidate.internal.expression.AstExpression;
-import build.buf.protovalidate.internal.expression.CompiledProgram;
-import build.buf.protovalidate.internal.expression.Expression;
-import build.buf.protovalidate.internal.expression.Variable;
 import build.buf.validate.Constraint;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
@@ -50,7 +42,7 @@
 import org.projectnessie.cel.checker.Decls;
 
 /** A build-through cache of message evaluators keyed off the provided descriptor. */
-public class EvaluatorBuilder {
+class EvaluatorBuilder {
   private static final FieldPathElement CEL_FIELD_PATH_ELEMENT =
       FieldPathUtils.fieldPathElement(
           FieldConstraints.getDescriptor().findFieldByNumber(FieldConstraints.CEL_FIELD_NUMBER));
diff --git a/src/main/java/build/buf/protovalidate/internal/expression/Expression.java b/src/main/java/build/buf/protovalidate/Expression.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/expression/Expression.java
rename to src/main/java/build/buf/protovalidate/Expression.java
index e4af662e..9c4c0820 100644
--- a/src/main/java/build/buf/protovalidate/internal/expression/Expression.java
+++ b/src/main/java/build/buf/protovalidate/Expression.java
@@ -12,14 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.expression;
+package build.buf.protovalidate;
 
 import build.buf.validate.Constraint;
 import java.util.ArrayList;
 import java.util.List;
 
 /** Expression represents a single CEL expression. */
-public class Expression {
+class Expression {
   /** The id of the constraint. */
   public final String id;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/FieldEvaluator.java b/src/main/java/build/buf/protovalidate/FieldEvaluator.java
similarity index 95%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/FieldEvaluator.java
rename to src/main/java/build/buf/protovalidate/FieldEvaluator.java
index 07f3d69c..c8069a67 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/FieldEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/FieldEvaluator.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import com.google.protobuf.Descriptors.FieldDescriptor;
diff --git a/src/main/java/build/buf/protovalidate/internal/errors/FieldPathUtils.java b/src/main/java/build/buf/protovalidate/FieldPathUtils.java
similarity index 97%
rename from src/main/java/build/buf/protovalidate/internal/errors/FieldPathUtils.java
rename to src/main/java/build/buf/protovalidate/FieldPathUtils.java
index 4b1103ae..aca207be 100644
--- a/src/main/java/build/buf/protovalidate/internal/errors/FieldPathUtils.java
+++ b/src/main/java/build/buf/protovalidate/FieldPathUtils.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.errors;
+package build.buf.protovalidate;
 
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
@@ -21,7 +21,7 @@
 import javax.annotation.Nullable;
 
 /** Utility class for manipulating error paths in violations. */
-public final class FieldPathUtils {
+final class FieldPathUtils {
   private FieldPathUtils() {}
 
   /**
diff --git a/src/main/java/build/buf/protovalidate/internal/celext/Format.java b/src/main/java/build/buf/protovalidate/Format.java
similarity index 99%
rename from src/main/java/build/buf/protovalidate/internal/celext/Format.java
rename to src/main/java/build/buf/protovalidate/Format.java
index 82ea82a0..80faeb0c 100644
--- a/src/main/java/build/buf/protovalidate/internal/celext/Format.java
+++ b/src/main/java/build/buf/protovalidate/Format.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
 import static java.time.format.DateTimeFormatter.ISO_INSTANT;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/ListEvaluator.java b/src/main/java/build/buf/protovalidate/ListEvaluator.java
similarity index 94%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/ListEvaluator.java
rename to src/main/java/build/buf/protovalidate/ListEvaluator.java
index ab240f8e..6b77d229 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/ListEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/ListEvaluator.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/MapEvaluator.java b/src/main/java/build/buf/protovalidate/MapEvaluator.java
similarity index 97%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/MapEvaluator.java
rename to src/main/java/build/buf/protovalidate/MapEvaluator.java
index 501b316a..1e92accd 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/MapEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/MapEvaluator.java
@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/MessageEvaluator.java b/src/main/java/build/buf/protovalidate/MessageEvaluator.java
similarity index 94%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/MessageEvaluator.java
rename to src/main/java/build/buf/protovalidate/MessageEvaluator.java
index 54a6075f..f5523720 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/MessageEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/MessageEvaluator.java
@@ -12,10 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/MessageValue.java b/src/main/java/build/buf/protovalidate/MessageValue.java
similarity index 86%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/MessageValue.java
rename to src/main/java/build/buf/protovalidate/MessageValue.java
index cd3c5bdf..9ec965d7 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/MessageValue.java
+++ b/src/main/java/build/buf/protovalidate/MessageValue.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import com.google.protobuf.Descriptors;
 import com.google.protobuf.Message;
@@ -21,11 +21,8 @@
 import java.util.Map;
 import javax.annotation.Nullable;
 
-/**
- * The {@link build.buf.protovalidate.internal.evaluator.Value} type that contains a {@link
- * com.google.protobuf.Message}.
- */
-public final class MessageValue implements Value {
+/** The {@link Value} type that contains a {@link com.google.protobuf.Message}. */
+final class MessageValue implements Value {
 
   /** Object type since the object type is inferred from the field descriptor. */
   private final Object value;
diff --git a/src/main/java/build/buf/protovalidate/internal/expression/NowVariable.java b/src/main/java/build/buf/protovalidate/NowVariable.java
similarity index 94%
rename from src/main/java/build/buf/protovalidate/internal/expression/NowVariable.java
rename to src/main/java/build/buf/protovalidate/NowVariable.java
index 6fbf4158..ab021979 100644
--- a/src/main/java/build/buf/protovalidate/internal/expression/NowVariable.java
+++ b/src/main/java/build/buf/protovalidate/NowVariable.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.expression;
+package build.buf.protovalidate;
 
 import java.time.Instant;
 import javax.annotation.Nullable;
@@ -24,7 +24,7 @@
  * {@link NowVariable} implements {@link Activation}, providing a lazily produced timestamp for
  * accessing the variable `now` that's constant within an evaluation.
  */
-public class NowVariable implements Activation {
+class NowVariable implements Activation {
   /** The name of the 'now' variable. */
   private static final String NOW_NAME = "now";
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/ObjectValue.java b/src/main/java/build/buf/protovalidate/ObjectValue.java
similarity index 84%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/ObjectValue.java
rename to src/main/java/build/buf/protovalidate/ObjectValue.java
index 53dddaf0..1c897220 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/ObjectValue.java
+++ b/src/main/java/build/buf/protovalidate/ObjectValue.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import com.google.protobuf.AbstractMessage;
 import com.google.protobuf.Descriptors;
@@ -25,11 +25,8 @@
 import javax.annotation.Nullable;
 import org.projectnessie.cel.common.ULong;
 
-/**
- * The {@link build.buf.protovalidate.internal.evaluator.Value} type that contains a field
- * descriptor and its value.
- */
-public final class ObjectValue implements Value {
+/** The {@link Value} type that contains a field descriptor and its value. */
+final class ObjectValue implements Value {
 
   /**
    * {@link com.google.protobuf.Descriptors.FieldDescriptor} is the field descriptor for the value.
@@ -40,7 +37,7 @@ public final class ObjectValue implements Value {
   private final Object value;
 
   /**
-   * Constructs a new {@link build.buf.protovalidate.internal.evaluator.ObjectValue}.
+   * Constructs a new {@link ObjectValue}.
    *
    * @param fieldDescriptor The field descriptor for the value.
    * @param value The value associated with the field descriptor.
@@ -90,7 +87,7 @@ public List<Value> repeatedValue() {
     if (fieldDescriptor.isRepeated()) {
       List<?> list = (List<?>) value;
       for (Object o : list) {
-        out.add(new build.buf.protovalidate.internal.evaluator.ObjectValue(fieldDescriptor, o));
+        out.add(new ObjectValue(fieldDescriptor, o));
       }
     }
     return out;
@@ -108,12 +105,10 @@ public Map<Value, Value> mapValue() {
     Map<Value, Value> out = new HashMap<>(input.size());
     for (AbstractMessage entry : input) {
       Object keyValue = entry.getField(keyDesc);
-      Value keyJavaValue =
-          new build.buf.protovalidate.internal.evaluator.ObjectValue(keyDesc, keyValue);
+      Value keyJavaValue = new ObjectValue(keyDesc, keyValue);
 
       Object valValue = entry.getField(valDesc);
-      Value valJavaValue =
-          new build.buf.protovalidate.internal.evaluator.ObjectValue(valDesc, valValue);
+      Value valJavaValue = new ObjectValue(valDesc, valValue);
 
       out.put(keyJavaValue, valJavaValue);
     }
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/OneofEvaluator.java b/src/main/java/build/buf/protovalidate/OneofEvaluator.java
similarity index 92%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/OneofEvaluator.java
rename to src/main/java/build/buf/protovalidate/OneofEvaluator.java
index a529d0b1..b2f59f26 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/OneofEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/OneofEvaluator.java
@@ -12,10 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
 import build.buf.validate.FieldPathElement;
 import com.google.protobuf.Descriptors.OneofDescriptor;
 import com.google.protobuf.Message;
@@ -23,7 +22,7 @@
 import java.util.List;
 
 /** {@link OneofEvaluator} performs validation on a oneof union. */
-public class OneofEvaluator implements Evaluator {
+class OneofEvaluator implements Evaluator {
   /** The {@link OneofDescriptor} targeted by this evaluator. */
   private final OneofDescriptor descriptor;
 
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/UnknownDescriptorEvaluator.java b/src/main/java/build/buf/protovalidate/UnknownDescriptorEvaluator.java
similarity index 92%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/UnknownDescriptorEvaluator.java
rename to src/main/java/build/buf/protovalidate/UnknownDescriptorEvaluator.java
index 76552636..380d457d 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/UnknownDescriptorEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/UnknownDescriptorEvaluator.java
@@ -12,10 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
 import com.google.protobuf.Descriptors.Descriptor;
 import java.util.Collections;
 import java.util.List;
diff --git a/src/main/java/build/buf/protovalidate/internal/celext/ValidateLibrary.java b/src/main/java/build/buf/protovalidate/ValidateLibrary.java
similarity index 91%
rename from src/main/java/build/buf/protovalidate/internal/celext/ValidateLibrary.java
rename to src/main/java/build/buf/protovalidate/ValidateLibrary.java
index d87da052..f28fe152 100644
--- a/src/main/java/build/buf/protovalidate/internal/celext/ValidateLibrary.java
+++ b/src/main/java/build/buf/protovalidate/ValidateLibrary.java
@@ -12,9 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
-import build.buf.protovalidate.internal.expression.NowVariable;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
@@ -27,7 +26,7 @@
  * Custom {@link Library} for CEL. Provides all the custom extension function definitions and
  * overloads.
  */
-public class ValidateLibrary implements Library {
+class ValidateLibrary implements Library {
 
   /** Creates a ValidateLibrary with all custom declarations and overloads. */
   public ValidateLibrary() {}
diff --git a/src/main/java/build/buf/protovalidate/Validator.java b/src/main/java/build/buf/protovalidate/Validator.java
index a812649b..cb575f00 100644
--- a/src/main/java/build/buf/protovalidate/Validator.java
+++ b/src/main/java/build/buf/protovalidate/Validator.java
@@ -15,12 +15,8 @@
 package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.CompilationException;
+import build.buf.protovalidate.exceptions.ExecutionException;
 import build.buf.protovalidate.exceptions.ValidationException;
-import build.buf.protovalidate.internal.celext.ValidateLibrary;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
-import build.buf.protovalidate.internal.evaluator.Evaluator;
-import build.buf.protovalidate.internal.evaluator.EvaluatorBuilder;
-import build.buf.protovalidate.internal.evaluator.MessageValue;
 import com.google.protobuf.Descriptors.Descriptor;
 import com.google.protobuf.Message;
 import java.util.ArrayList;
@@ -65,7 +61,7 @@ public Validator() {
    * message is invalid. An exception is thrown if the message cannot be validated because the
    * evaluation logic for the message cannot be built ({@link CompilationException}), or there is a
    * type error when attempting to evaluate a CEL expression associated with the message ({@link
-   * build.buf.protovalidate.exceptions.ExecutionException}).
+   * ExecutionException}).
    *
    * @param msg the {@link Message} to be validated.
    * @return the {@link ValidationResult} from the evaluation.
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/Value.java b/src/main/java/build/buf/protovalidate/Value.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/Value.java
rename to src/main/java/build/buf/protovalidate/Value.java
index b6a07f3e..5aa920f2 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/Value.java
+++ b/src/main/java/build/buf/protovalidate/Value.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import com.google.protobuf.Descriptors;
 import com.google.protobuf.Message;
@@ -24,7 +24,7 @@
  * {@link Value} is a wrapper around a protobuf value that provides helper methods for accessing the
  * value.
  */
-public interface Value {
+interface Value {
   /**
    * Get the field descriptor that corresponds to the underlying Value, if it is a message field.
    *
diff --git a/src/main/java/build/buf/protovalidate/internal/evaluator/ValueEvaluator.java b/src/main/java/build/buf/protovalidate/ValueEvaluator.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/evaluator/ValueEvaluator.java
rename to src/main/java/build/buf/protovalidate/ValueEvaluator.java
index a84359da..ea050b9a 100644
--- a/src/main/java/build/buf/protovalidate/internal/evaluator/ValueEvaluator.java
+++ b/src/main/java/build/buf/protovalidate/ValueEvaluator.java
@@ -12,10 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.evaluator;
+package build.buf.protovalidate;
 
 import build.buf.protovalidate.exceptions.ExecutionException;
-import build.buf.protovalidate.internal.errors.ConstraintViolation;
 import build.buf.validate.FieldPath;
 import com.google.protobuf.Descriptors;
 import java.util.ArrayList;
diff --git a/src/main/java/build/buf/protovalidate/internal/expression/Variable.java b/src/main/java/build/buf/protovalidate/Variable.java
similarity index 96%
rename from src/main/java/build/buf/protovalidate/internal/expression/Variable.java
rename to src/main/java/build/buf/protovalidate/Variable.java
index b0aaebfd..e026ef6e 100644
--- a/src/main/java/build/buf/protovalidate/internal/expression/Variable.java
+++ b/src/main/java/build/buf/protovalidate/Variable.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.expression;
+package build.buf.protovalidate;
 
 import javax.annotation.Nullable;
 import org.projectnessie.cel.interpreter.Activation;
@@ -22,7 +22,7 @@
  * {@link Variable} implements {@link org.projectnessie.cel.interpreter.Activation}, providing a
  * lightweight named variable to cel.Program executions.
  */
-public class Variable implements Activation {
+class Variable implements Activation {
   /** The {@value} variable in CEL. */
   public static final String THIS_NAME = "this";
 
diff --git a/src/test/java/build/buf/protovalidate/internal/celext/CustomOverloadTest.java b/src/test/java/build/buf/protovalidate/CustomOverloadTest.java
similarity index 99%
rename from src/test/java/build/buf/protovalidate/internal/celext/CustomOverloadTest.java
rename to src/test/java/build/buf/protovalidate/CustomOverloadTest.java
index 73eb9344..24deb7ec 100644
--- a/src/test/java/build/buf/protovalidate/internal/celext/CustomOverloadTest.java
+++ b/src/test/java/build/buf/protovalidate/CustomOverloadTest.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
diff --git a/src/test/java/build/buf/protovalidate/internal/celext/FormatTest.java b/src/test/java/build/buf/protovalidate/FormatTest.java
similarity index 92%
rename from src/test/java/build/buf/protovalidate/internal/celext/FormatTest.java
rename to src/test/java/build/buf/protovalidate/FormatTest.java
index 4c963e1e..a5656505 100644
--- a/src/test/java/build/buf/protovalidate/internal/celext/FormatTest.java
+++ b/src/test/java/build/buf/protovalidate/FormatTest.java
@@ -12,10 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package build.buf.protovalidate.internal.celext;
+package build.buf.protovalidate;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.Test;
 import org.projectnessie.cel.common.types.ListT;
diff --git a/src/test/java/build/buf/protovalidate/ValidatorDifferentJavaPackagesTest.java b/src/test/java/build/buf/protovalidate/ValidatorDifferentJavaPackagesTest.java
index 6623f177..e8f05110 100644
--- a/src/test/java/build/buf/protovalidate/ValidatorDifferentJavaPackagesTest.java
+++ b/src/test/java/build/buf/protovalidate/ValidatorDifferentJavaPackagesTest.java
@@ -17,7 +17,6 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import build.buf.protovalidate.exceptions.ValidationException;
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;
diff --git a/src/test/java/build/buf/protovalidate/ValidatorDynamicMessageTest.java b/src/test/java/build/buf/protovalidate/ValidatorDynamicMessageTest.java
index 9cd6d8a1..a358b6d6 100644
--- a/src/test/java/build/buf/protovalidate/ValidatorDynamicMessageTest.java
+++ b/src/test/java/build/buf/protovalidate/ValidatorDynamicMessageTest.java
@@ -17,7 +17,6 @@
 import static com.example.imports.validationtest.PredefinedProto.isIdent;
 import static org.assertj.core.api.Assertions.assertThat;
 
-import build.buf.protovalidate.internal.errors.FieldPathUtils;
 import build.buf.validate.FieldConstraints;
 import build.buf.validate.FieldPath;
 import build.buf.validate.FieldPathElement;