Add @codeCoverageIgnore for optional dependency guards

Runtime guards for mcp/sdk cannot be tested when the package is
installed, so mark them for coverage exclusion.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mowens3

CHANGELOG.md

@@ -8,7 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [1.2.3] - 2026-01-09
 
 ### Fixed
-- Remove unreachable code branch in `toJsonRpcError()` for 100% test coverage
+- Achieve 100% test coverage by excluding optional dependency guards
+- Remove unreachable code branch in `toJsonRpcError()`
 
 ## [1.2.0] - 2025-01-09
 

src/ErrorBag.php

@@ -244,11 +244,13 @@ public function getSummaryMessage(): string
      */
     public function toCallToolResult(): object
     {
+        // @codeCoverageIgnoreStart
         if (!class_exists(\Mcp\Schema\Result\CallToolResult::class)) {
             throw new \RuntimeException(
                 'mcp/sdk package is required for toCallToolResult(). Install with: composer require mcp/sdk'
             );
         }
+        // @codeCoverageIgnoreEnd
 
         if (empty($this->errors)) {
             return new \Mcp\Schema\Result\CallToolResult(
@@ -272,11 +274,13 @@ public function toCallToolResult(): object
      */
     public function toJsonRpcError(): object
     {
+        // @codeCoverageIgnoreStart
         if (!class_exists(\Mcp\Schema\JsonRpc\Error::class)) {
             throw new \RuntimeException(
                 'mcp/sdk package is required for toJsonRpcError(). Install with: composer require mcp/sdk'
             );
         }
+        // @codeCoverageIgnoreEnd
 
         if (empty($this->errors)) {
             throw new \RuntimeException('Cannot convert empty ErrorBag to JsonRpcError');

src/McpError.php

@@ -352,11 +352,13 @@ public function toArray(): array
      */
     public function toCallToolResult(): object
     {
+        // @codeCoverageIgnoreStart
         if (!class_exists(\Mcp\Schema\Result\CallToolResult::class)) {
             throw new \RuntimeException(
                 'mcp/sdk package is required for toCallToolResult(). Install with: composer require mcp/sdk'
             );
         }
+        // @codeCoverageIgnoreEnd
 
         $content = [new \Mcp\Schema\Content\TextContent($this->getMessage())];
         $structured = $this->toArray();
@@ -374,11 +376,13 @@ public function toCallToolResult(): object
      */
     public function toJsonRpcError(): object
     {
+        // @codeCoverageIgnoreStart
         if (!class_exists(\Mcp\Schema\JsonRpc\Error::class)) {
             throw new \RuntimeException(
                 'mcp/sdk package is required for toJsonRpcError(). Install with: composer require mcp/sdk'
             );
         }
+        // @codeCoverageIgnoreEnd
 
         $data = $this->toArray();
         unset($data['success'], $data['error']);