diff --git a/data-access-kit/src/Repository/Compiler.php b/data-access-kit/src/Repository/Compiler.php
index 6af0ecc..3d234f5 100644
--- a/data-access-kit/src/Repository/Compiler.php
+++ b/data-access-kit/src/Repository/Compiler.php
@@ -71,8 +71,8 @@ public function prepare(ReflectionClass|string $repositoryInterface): Result
 
 		if (!$repositoryInterface->isInterface()) {
 			throw new CompilerException(sprintf(
-				"The provided class name must be an interface, %s is not an interface.",
-				$repositoryInterface,
+				"The provided class name must be an interface, [%s] is not an interface.",
+				$repositoryInterface->getName(),
 			));
 		}
 
@@ -147,7 +147,7 @@ public function compile(Result $result): Result
 					$returnType = $rm->getReturnType();
 					if (!$returnType instanceof ReflectionNamedType || !in_array($returnType->getName(), ["array", "iterable", $result->repository->class], true)) {
 						throw new CompilerException(sprintf(
-							"Method [%s::%s] must return array, iterable, or [%s] to able to be generated. Either change the return type, add an attribute, or remove the method.",
+							"Find method [%s::%s] must return array, iterable, or [%s] to able to be generated. Either change the return type, add an attribute, or remove the method.",
 							$result->reflection->getName(),
 							$rm->getName(),
 							$result->repository->class,
@@ -161,7 +161,7 @@ public function compile(Result $result): Result
 					$returnType = $rm->getReturnType();
 					if (!$returnType instanceof ReflectionNamedType || $returnType->getName() !== "int") {
 						throw new CompilerException(sprintf(
-							"Method [%s::%s] must return int to able to be generated. Either change the return type, add an attribute, or remove the method.",
+							"Count method [%s::%s] must return int to able to be generated. Either change the return type, add an attribute, or remove the method.",
 							$result->reflection->getName(),
 							$rm->getName(),
 						));
diff --git a/data-access-kit/src/Repository/Method/BuildWhereTrait.php b/data-access-kit/src/Repository/Method/BuildWhereTrait.php
index d7dd286..9a33e6c 100644
--- a/data-access-kit/src/Repository/Method/BuildWhereTrait.php
+++ b/data-access-kit/src/Repository/Method/BuildWhereTrait.php
@@ -26,10 +26,10 @@ private function buildWhere(ResultMethod $method, Table $table, Result $result,
 			}
 			if ($column === null) {
 				throw new CompilerException(sprintf(
-					"Method [%s::%s] parameter [%s] does not match any property of [%s], and therefore cannot be used as a query condition.",
+					"Parameter [%s] of method [%s::%s] does not match any property of [%s], and therefore cannot be used as a query condition.",
+					$parameter->getName(),
 					$result->reflection->getName(),
 					$method->reflection->getName(),
-					$parameter->getName(),
 					$result->repository->class,
 				));
 			}
diff --git a/data-access-kit/src/Repository/Method/DelegateMethodCompiler.php b/data-access-kit/src/Repository/Method/DelegateMethodCompiler.php
index 8a96fa2..236fa82 100644
--- a/data-access-kit/src/Repository/Method/DelegateMethodCompiler.php
+++ b/data-access-kit/src/Repository/Method/DelegateMethodCompiler.php
@@ -4,12 +4,16 @@
 
 use DataAccessKit\Repository\Attribute\Delegate;
 use DataAccessKit\Repository\Compiler;
+use DataAccessKit\Repository\Exception\CompilerException;
 use DataAccessKit\Repository\MethodCompilerInterface;
 use DataAccessKit\Repository\Result;
 use DataAccessKit\Repository\ResultMethod;
 use ReflectionClass;
+use ReflectionException;
 use ReflectionNamedType;
+use function class_exists;
 use function lcfirst;
+use function sprintf;
 use function ucfirst;
 
 /**
@@ -19,7 +23,21 @@ class DelegateMethodCompiler implements MethodCompilerInterface
 {
 	public function compile(Result $result, ResultMethod $method, $attribute): void
 	{
-		$delegateRC = new ReflectionClass($attribute->class);
+		try {
+			$delegateRC = new ReflectionClass($attribute->class);
+		} catch (ReflectionException $e) {
+			throw new CompilerException(
+				sprintf(
+					"Delegate class [%s] referenced by method [%s::%s] does not exist. Please fix the class, interface, or trait reference.",
+					$attribute->class,
+					$result->reflection->getName(),
+					$method->reflection->getName(),
+				),
+				0,
+				$e,
+			);
+		}
+
 		$alias = $result->use($delegateRC->getName());
 		$propertyName = lcfirst($alias);
 
@@ -54,6 +72,17 @@ public function compile(Result $result, ResultMethod $method, $attribute): void
 		}
 
 		$delegateMethodName = $attribute->method ?? $method->name;
+		if (!$delegateRC->hasMethod($delegateMethodName)) {
+			throw new CompilerException(
+				sprintf(
+					"Delegate method [%s::%s] referenced by method [%s::%s] does not exist. Please fix the method name.",
+					$delegateRC->getName(),
+					$delegateMethodName,
+					$result->reflection->getName(),
+					$method->reflection->getName(),
+				),
+			);
+		}
 		$returnType = $method->reflection->getReturnType();
 		$void = $returnType instanceof ReflectionNamedType && $returnType->getName() === "void";
 		$method->line((!$void ? "return " : "") . "\$this->{$propertyName}->{$delegateMethodName}(...func_get_args());");
diff --git a/data-access-kit/src/Repository/Method/SQLFileMethodCompiler.php b/data-access-kit/src/Repository/Method/SQLFileMethodCompiler.php
index daf4523..a7132f0 100644
--- a/data-access-kit/src/Repository/Method/SQLFileMethodCompiler.php
+++ b/data-access-kit/src/Repository/Method/SQLFileMethodCompiler.php
@@ -42,7 +42,7 @@ public function compile(Result $result, ResultMethod $method, $attribute): void
 			$file = dirname($result->reflection->getFileName()) . DIRECTORY_SEPARATOR . $file;
 		}
 
-		$contents = file_get_contents($file);
+		$contents = @file_get_contents($file);
 		if ($contents === false) {
 			throw new CompilerException(sprintf(
 				"SQL file for method [%s::%s] does not exist or is not readable.",
diff --git a/data-access-kit/test/Repository/CompilerTest.php b/data-access-kit/test/Repository/CompilerTest.php
index 8f223c4..8339260 100644
--- a/data-access-kit/test/Repository/CompilerTest.php
+++ b/data-access-kit/test/Repository/CompilerTest.php
@@ -6,10 +6,21 @@
 use DataAccessKit\Registry;
 use DataAccessKit\Repository\Exception\CompilerException;
 use DataAccessKit\Repository\Fixture\AbsoluteSQLFileRepositoryInterface;
+use DataAccessKit\Repository\Fixture\CountBadParameterNameRepositoryInterface;
+use DataAccessKit\Repository\Fixture\CountBadReturnTypeRepositoryInterface;
+use DataAccessKit\Repository\Fixture\DelegateClassDoesNotExistRepositoryInterface;
+use DataAccessKit\Repository\Fixture\DelegateMethodDoesNotExistRepositoryInterface;
+use DataAccessKit\Repository\Fixture\EmptyFileNameSQLFileRepositoryInterface;
+use DataAccessKit\Repository\Fixture\FileDoesNotExistSQLFileRepositoryInterface;
+use DataAccessKit\Repository\Fixture\FindBadParameterNameRepositoryInterface;
+use DataAccessKit\Repository\Fixture\FindBadReturnTypeRepositoryInterface;
+use DataAccessKit\Repository\Fixture\MacroColumnsExceptAllColumnRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsExceptFromRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsExceptMultipleFromRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsExceptMultipleRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsExceptRepositoryInterface;
+use DataAccessKit\Repository\Fixture\MacroUnknownRepositoryInterface;
+use DataAccessKit\Repository\Fixture\MacroColumnsExceptUnknownColumnRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsFromRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroColumnsRepositoryInterface;
 use DataAccessKit\Repository\Fixture\CountRepositoryInterface;
@@ -31,6 +42,12 @@
 use DataAccessKit\Repository\Fixture\SimpleSQLNullableObjectRepositoryInterface;
 use DataAccessKit\Repository\Fixture\SimpleSQLObjectRepositoryInterface;
 use DataAccessKit\Repository\Fixture\MacroTableSQLRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnhandledMethodRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnknownVariableSQLRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnsupportedReturnTypeIntersectRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnsupportedReturnTypeMixedRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnsupportedReturnTypeObjectRepositoryInterface;
+use DataAccessKit\Repository\Fixture\UnsupportedReturnTypeUnionRepositoryInterface;
 use DataAccessKit\Repository\Fixture\UnusedVariableSQLRepositoryInterface;
 use DataAccessKit\Repository\Fixture\VariableSQLRepositoryInterface;
 use DataAccessKit\Repository\Fixture\VoidSQLRepositoryInterface;
@@ -56,20 +73,6 @@ protected function setUp(): void
 		$this->compiler = new Compiler(new Registry(new DefaultNameConverter()));
 	}
 
-	public function testCompileAcceptsOnlyInterface()
-	{
-		$this->expectException(CompilerException::class);
-		$this->expectExceptionMessage("must be an interface");
-		$this->compiler->compile($this->compiler->prepare(CompilerTest::class));
-	}
-
-	public function testCompileAcceptsOnlyInterfaceWithAttribute()
-	{
-		$this->expectException(CompilerException::class);
-		$this->expectExceptionMessage("must have a #[\\DataAccessKit\\Repository\\Attribute\\Repository] attribute");
-		$this->compiler->compile($this->compiler->prepare(NoAttributeInterface::class));
-	}
-
 	#[DataProvider("provideCompile")]
 	public function testCompile(string $interfaceName)
 	{
@@ -113,7 +116,7 @@ public static function provideCompile()
 	public function testCompileError(string $interfaceName): void
 	{
 		try {
-			$this->compiler->compile($this->compiler->prepare(UnusedVariableSQLRepositoryInterface::class));
+			$this->compiler->compile($this->compiler->prepare($interfaceName));
 		} catch (CompilerException $e) {
 			$this->assertMatchesSnapshot($e->getMessage());
 		}
@@ -122,7 +125,26 @@ public function testCompileError(string $interfaceName): void
 	public static function provideCompileError(): iterable
 	{
 		return static::provideRepositoryClasses([
+			CompilerTest::class,
+			NoAttributeInterface::class,
 			UnusedVariableSQLRepositoryInterface::class,
+			FindBadReturnTypeRepositoryInterface::class,
+			CountBadReturnTypeRepositoryInterface::class,
+			UnhandledMethodRepositoryInterface::class,
+			FindBadParameterNameRepositoryInterface::class,
+			CountBadParameterNameRepositoryInterface::class,
+			DelegateClassDoesNotExistRepositoryInterface::class,
+			DelegateMethodDoesNotExistRepositoryInterface::class,
+			FileDoesNotExistSQLFileRepositoryInterface::class,
+			EmptyFileNameSQLFileRepositoryInterface::class,
+			UnsupportedReturnTypeUnionRepositoryInterface::class,
+			UnsupportedReturnTypeIntersectRepositoryInterface::class,
+			UnsupportedReturnTypeMixedRepositoryInterface::class,
+			UnsupportedReturnTypeObjectRepositoryInterface::class,
+			UnknownVariableSQLRepositoryInterface::class,
+			MacroColumnsExceptUnknownColumnRepositoryInterface::class,
+			MacroColumnsExceptAllColumnRepositoryInterface::class,
+			MacroUnknownRepositoryInterface::class,
 		]);
 	}
 
diff --git a/data-access-kit/test/Repository/Fixture/Bar.php b/data-access-kit/test/Repository/Fixture/Bar.php
new file mode 100644
index 0000000..93d63f4
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/Bar.php
@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Attribute\Column;
+use DataAccessKit\Attribute\Table;
+
+#[Table]
+class Bar
+{
+	#[Column(primary: true, generated: true)]
+	public int $id;
+
+	#[Column]
+	public string $title;
+}
diff --git a/data-access-kit/test/Repository/Fixture/CountBadParameterNameRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/CountBadParameterNameRepositoryInterface.php
new file mode 100644
index 0000000..0d56f24
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/CountBadParameterNameRepositoryInterface.php
@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface CountBadParameterNameRepositoryInterface
+{
+	public function countByTitle(string $tytle): int;
+}
diff --git a/data-access-kit/test/Repository/Fixture/CountBadReturnTypeRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/CountBadReturnTypeRepositoryInterface.php
new file mode 100644
index 0000000..f6f01d0
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/CountBadReturnTypeRepositoryInterface.php
@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface CountBadReturnTypeRepositoryInterface
+{
+	public function countByTitle(string $title): Foo;
+}
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Fixture/DelegateClassDoesNotExistRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/DelegateClassDoesNotExistRepositoryInterface.php
new file mode 100644
index 0000000..2d10051
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/DelegateClassDoesNotExistRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Delegate;
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface DelegateClassDoesNotExistRepositoryInterface
+{
+	#[Delegate('This\Class\Does\Not\Exist')]
+	public function foo();
+}
diff --git a/data-access-kit/test/Repository/Fixture/DelegateMethodDoesNotExistRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/DelegateMethodDoesNotExistRepositoryInterface.php
new file mode 100644
index 0000000..88116d1
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/DelegateMethodDoesNotExistRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Delegate;
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface DelegateMethodDoesNotExistRepositoryInterface
+{
+	#[Delegate(DeepThought::class, method: "thisMethodDoesNotExist")]
+	public function computeTheAnswer(): int;
+}
diff --git a/data-access-kit/test/Repository/Fixture/EmptyFileNameSQLFileRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/EmptyFileNameSQLFileRepositoryInterface.php
new file mode 100644
index 0000000..bf2c125
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/EmptyFileNameSQLFileRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQLFile;
+
+#[Repository(Foo::class)]
+interface EmptyFileNameSQLFileRepositoryInterface
+{
+	#[SQLFile("")]
+	public function findByTitle(string $title): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/FileDoesNotExistSQLFileRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/FileDoesNotExistSQLFileRepositoryInterface.php
new file mode 100644
index 0000000..d1d6603
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/FileDoesNotExistSQLFileRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQLFile;
+
+#[Repository(Foo::class)]
+interface FileDoesNotExistSQLFileRepositoryInterface
+{
+	#[SQLFile(file: __DIR__ . "/file-does-not-exist.sql")]
+	public function findByTitle(string $title): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/FindBadParameterNameRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/FindBadParameterNameRepositoryInterface.php
new file mode 100644
index 0000000..c1bf086
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/FindBadParameterNameRepositoryInterface.php
@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface FindBadParameterNameRepositoryInterface
+{
+	public function findByTitle(string $tytle): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/FindBadReturnTypeRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/FindBadReturnTypeRepositoryInterface.php
new file mode 100644
index 0000000..4cb71c4
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/FindBadReturnTypeRepositoryInterface.php
@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface FindBadReturnTypeRepositoryInterface
+{
+	public function findByTitle(string $title): int;
+}
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Fixture/MacroColumnsExceptAllColumnRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/MacroColumnsExceptAllColumnRepositoryInterface.php
new file mode 100644
index 0000000..7e3db18
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/MacroColumnsExceptAllColumnRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface MacroColumnsExceptAllColumnRepositoryInterface
+{
+	#[SQL("SELECT %columns(except id, title, description) FROM foos")]
+	public function allColumnsExcept(): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/MacroColumnsExceptUnknownColumnRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/MacroColumnsExceptUnknownColumnRepositoryInterface.php
new file mode 100644
index 0000000..64e3570
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/MacroColumnsExceptUnknownColumnRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface MacroColumnsExceptUnknownColumnRepositoryInterface
+{
+	#[SQL("SELECT %columns(except non_existent_column) FROM foos")]
+	public function allColumnsExcept(): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/MacroUnknownRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/MacroUnknownRepositoryInterface.php
new file mode 100644
index 0000000..0ab33da
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/MacroUnknownRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface MacroUnknownRepositoryInterface
+{
+	#[SQL("SELECT %clonums FROM foos")]
+	public function allColumns(): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/MultipleMethodAttributesRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/MultipleMethodAttributesRepositoryInterface.php
new file mode 100644
index 0000000..4438682
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/MultipleMethodAttributesRepositoryInterface.php
@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Find;
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface MultipleMethodAttributesRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos WHERE title = @title")]
+	#[Find(where: "title = @title")]
+	public function findByTitle(string $title): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnhandledMethodRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnhandledMethodRepositoryInterface.php
new file mode 100644
index 0000000..2d90698
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnhandledMethodRepositoryInterface.php
@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+
+#[Repository(Foo::class)]
+interface UnhandledMethodRepositoryInterface
+{
+	public function unhandled(): void;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnknownVariableSQLRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnknownVariableSQLRepositoryInterface.php
new file mode 100644
index 0000000..3e0bcda
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnknownVariableSQLRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface UnknownVariableSQLRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos WHERE title = @tytle")]
+	public function findByTitle(string $title): iterable;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeIntersectRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeIntersectRepositoryInterface.php
new file mode 100644
index 0000000..361ca94
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeIntersectRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface UnsupportedReturnTypeIntersectRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos")]
+	public function find(): Foo&Bar;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeMixedRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeMixedRepositoryInterface.php
new file mode 100644
index 0000000..ec250d6
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeMixedRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface UnsupportedReturnTypeMixedRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos")]
+	public function find(): mixed;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeObjectRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeObjectRepositoryInterface.php
new file mode 100644
index 0000000..2bdc369
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeObjectRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface UnsupportedReturnTypeObjectRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos")]
+	public function find(): object;
+}
diff --git a/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeUnionRepositoryInterface.php b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeUnionRepositoryInterface.php
new file mode 100644
index 0000000..d3072f3
--- /dev/null
+++ b/data-access-kit/test/Repository/Fixture/UnsupportedReturnTypeUnionRepositoryInterface.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace DataAccessKit\Repository\Fixture;
+
+use DataAccessKit\Repository\Attribute\Repository;
+use DataAccessKit\Repository\Attribute\SQL;
+
+#[Repository(Foo::class)]
+interface UnsupportedReturnTypeUnionRepositoryInterface
+{
+	#[SQL("SELECT * FROM foos")]
+	public function find(): Foo|Bar;
+}
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.compilerTest.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.compilerTest.txt
new file mode 100644
index 0000000..f569923
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.compilerTest.txt
@@ -0,0 +1 @@
+The provided class name must be an interface, [DataAccessKit\Repository\CompilerTest] is not an interface.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadParameterName.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadParameterName.txt
new file mode 100644
index 0000000..5e4bd5e
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadParameterName.txt
@@ -0,0 +1 @@
+Parameter [tytle] of method [DataAccessKit\Repository\Fixture\CountBadParameterNameRepositoryInterface::countByTitle] does not match any property of [DataAccessKit\Repository\Fixture\Foo], and therefore cannot be used as a query condition.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadReturnType.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadReturnType.txt
new file mode 100644
index 0000000..8cc52bf
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.countBadReturnType.txt
@@ -0,0 +1 @@
+Count method [DataAccessKit\Repository\Fixture\CountBadReturnTypeRepositoryInterface::countByTitle] must return int to able to be generated. Either change the return type, add an attribute, or remove the method.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateClassDoesNotExist.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateClassDoesNotExist.txt
new file mode 100644
index 0000000..d3b7b05
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateClassDoesNotExist.txt
@@ -0,0 +1 @@
+Delegate class [This\Class\Does\Not\Exist] referenced by method [DataAccessKit\Repository\Fixture\DelegateClassDoesNotExistRepositoryInterface::foo] does not exist. Please fix the class, interface, or trait reference.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateMethodDoesNotExist.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateMethodDoesNotExist.txt
new file mode 100644
index 0000000..3a845d8
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.delegateMethodDoesNotExist.txt
@@ -0,0 +1 @@
+Delegate method [DataAccessKit\Repository\Fixture\DeepThought::thisMethodDoesNotExist] referenced by method [DataAccessKit\Repository\Fixture\DelegateMethodDoesNotExistRepositoryInterface::computeTheAnswer] does not exist. Please fix the method name.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.emptyFileNameSQLFile.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.emptyFileNameSQLFile.txt
new file mode 100644
index 0000000..2ff88d2
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.emptyFileNameSQLFile.txt
@@ -0,0 +1 @@
+SQL file for method [DataAccessKit\Repository\Fixture\EmptyFileNameSQLFileRepositoryInterface::findByTitle] is blank, please specify a file path.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.fileDoesNotExistSQLFile.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.fileDoesNotExistSQLFile.txt
new file mode 100644
index 0000000..f01ba77
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.fileDoesNotExistSQLFile.txt
@@ -0,0 +1 @@
+SQL file for method [DataAccessKit\Repository\Fixture\FileDoesNotExistSQLFileRepositoryInterface::findByTitle] does not exist or is not readable.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadParameterName.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadParameterName.txt
new file mode 100644
index 0000000..9527003
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadParameterName.txt
@@ -0,0 +1 @@
+Parameter [tytle] of method [DataAccessKit\Repository\Fixture\FindBadParameterNameRepositoryInterface::findByTitle] does not match any property of [DataAccessKit\Repository\Fixture\Foo], and therefore cannot be used as a query condition.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadReturnType.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadReturnType.txt
new file mode 100644
index 0000000..0c32a29
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.findBadReturnType.txt
@@ -0,0 +1 @@
+Find method [DataAccessKit\Repository\Fixture\FindBadReturnTypeRepositoryInterface::findByTitle] must return array, iterable, or [DataAccessKit\Repository\Fixture\Foo] to able to be generated. Either change the return type, add an attribute, or remove the method.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptAllColumn.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptAllColumn.txt
new file mode 100644
index 0000000..5a13d03
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptAllColumn.txt
@@ -0,0 +1 @@
+SQL for method [DataAccessKit\Repository\Fixture\MacroColumnsExceptAllColumnRepositoryInterface::allColumnsExcept] contains %columns(except ...) where it excepts all columns. Remove columns from except clause, or remove the clause entirely.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptUnknownColumn.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptUnknownColumn.txt
new file mode 100644
index 0000000..54b0557
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroColumnsExceptUnknownColumn.txt
@@ -0,0 +1 @@
+SQL for method [DataAccessKit\Repository\Fixture\MacroColumnsExceptUnknownColumnRepositoryInterface::allColumnsExcept] contains %columns(except ...) where it excepts unknown column [non_existent_column]. Please check for typos.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroUnknown.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroUnknown.txt
new file mode 100644
index 0000000..b542a24
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.macroUnknown.txt
@@ -0,0 +1 @@
+SQL for method [DataAccessKit\Repository\Fixture\MacroUnknownRepositoryInterface::allColumns] contains unknown macro [clonums]. Please check for typos.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.noAttributeInterface.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.noAttributeInterface.txt
new file mode 100644
index 0000000..7a9c80e
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.noAttributeInterface.txt
@@ -0,0 +1 @@
+The provided interface must have a #[\DataAccessKit\Repository\Attribute\Repository] attribute.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unhandledMethod.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unhandledMethod.txt
new file mode 100644
index 0000000..77e65f8
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unhandledMethod.txt
@@ -0,0 +1 @@
+Doesn't know how to generate method [DataAccessKit\Repository\Fixture\UnhandledMethodRepositoryInterface::unhandled]. Either change the method, add an attribute, or remove the method.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unknownVariableSQL.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unknownVariableSQL.txt
new file mode 100644
index 0000000..330851d
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unknownVariableSQL.txt
@@ -0,0 +1 @@
+SQL for method [DataAccessKit\Repository\Fixture\UnknownVariableSQLRepositoryInterface::findByTitle] contains variable @tytle, but method does not have parameter with this name. Please check for typos.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeIntersect.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeIntersect.txt
new file mode 100644
index 0000000..834fcf0
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeIntersect.txt
@@ -0,0 +1 @@
+Method [DataAccessKit\Repository\Fixture\UnsupportedReturnTypeIntersectRepositoryInterface::find] has unsupported return type. Please provide named return type (scalar, array, iterable, or class name).
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeMixed.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeMixed.txt
new file mode 100644
index 0000000..15143f0
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeMixed.txt
@@ -0,0 +1 @@
+Method [DataAccessKit\Repository\Fixture\UnsupportedReturnTypeMixedRepositoryInterface::find] has unsupported scalar return type [mixed]. Please use int, float, string, or bool.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeObject.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeObject.txt
new file mode 100644
index 0000000..5be957b
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeObject.txt
@@ -0,0 +1 @@
+Method [DataAccessKit\Repository\Fixture\UnsupportedReturnTypeObjectRepositoryInterface::find] has unsupported scalar return type [object]. Please use int, float, string, or bool.
\ No newline at end of file
diff --git a/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeUnion.txt b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeUnion.txt
new file mode 100644
index 0000000..5a8fd3d
--- /dev/null
+++ b/data-access-kit/test/Repository/Snapshot/CompilerTest.testCompileError.unsupportedReturnTypeUnion.txt
@@ -0,0 +1 @@
+Method [DataAccessKit\Repository\Fixture\UnsupportedReturnTypeUnionRepositoryInterface::find] has unsupported return type. Please provide named return type (scalar, array, iterable, or class name).
\ No newline at end of file
diff --git a/phpunit.xml b/phpunit.xml
index 574d178..0512c68 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd">
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         failOnWarning="true"
+         displayDetailsOnTestsThatTriggerWarnings="true"
+         failOnNotice="true"
+         displayDetailsOnTestsThatTriggerNotices="true">
     <testsuites>
         <testsuite name="data-access-kit">
             <directory>data-access-kit/test</directory>