refactor: fix CI, use zod v4, and latest method in mcp

knip.json

@@ -18,6 +18,7 @@
     },
     "packages/core": { "project": ["src/**/*.{cts,js,ts}"] },
     "packages/mcp": {
+      "ignoreDependencies": ["@types/express"],
       "entry": ["tests/**/*.{cts,js,ts}"],
       "project": ["src/**/*.{cts,js,ts}", "tests/**/*.{cts,js,ts}"]
     },

package.json

@@ -42,7 +42,7 @@
     "knip": "^5.62.0",
     "lint-staged": "^16.0.0",
     "mocha": "^11.5.0",
-    "prettier": "^3.4.1",
+    "prettier": "^3.7.3",
     "rollup": "^4.52.3",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.0.0",

packages/core/src/types.ts

@@ -1030,8 +1030,9 @@ export interface BaseConfig<
 /**
  * The overwrites that apply more differing configuration to specific files or directories.
  */
-export interface ConfigOverride<Rules extends RulesConfig = RulesConfig>
-	extends BaseConfig<Rules> {
+export interface ConfigOverride<
+	Rules extends RulesConfig = RulesConfig,
+> extends BaseConfig<Rules> {
 	/**
 	 * The glob patterns for excluded files.
 	 */

packages/core/tests/types/types.test.ts

@@ -96,15 +96,12 @@ interface TestLanguageOptions extends LanguageOptions {
 	howMuch?: "yes" | "no" | boolean;
 }
 
-class TestSourceCode
-	implements
-		TextSourceCode<{
-			LangOptions: TestLanguageOptions;
-			RootNode: TestRootNode;
-			SyntaxElementWithLoc: unknown;
-			ConfigNode: unknown;
-		}>
-{
+class TestSourceCode implements TextSourceCode<{
+	LangOptions: TestLanguageOptions;
+	RootNode: TestRootNode;
+	SyntaxElementWithLoc: unknown;
+	ConfigNode: unknown;
+}> {
 	text: string;
 	ast: TestRootNode;
 	notMuch: "no" | false;
@@ -394,8 +391,8 @@ const testRuleWithInvalidDefaultOptions: RuleDefinition<{
 testRuleWithInvalidDefaultOptions.meta satisfies RulesMeta | undefined;
 
 type TestRuleDefinition<
-	Options extends
-		Partial<CustomRuleTypeDefinitions> = CustomRuleTypeDefinitions,
+	Options extends Partial<CustomRuleTypeDefinitions> =
+		CustomRuleTypeDefinitions,
 > = CustomRuleDefinitionType<
 	{
 		LangOptions: TestLanguageOptions;

packages/mcp/package.json

@@ -36,12 +36,13 @@
     "node": "^20.19.0 || ^22.13.0 || >=24"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.22.0",
+    "@modelcontextprotocol/sdk": "^1.24.1",
     "eslint": "^9.39.1",
-    "zod": "^3.24.4"
+    "zod": "^4.1.13"
   },
   "devDependencies": {
     "@cfworker/json-schema": "^4.1.1",
+    "@types/express": "^5.0.6",
     "@types/node": "^24.7.2"
   }
 }

packages/mcp/src/mcp-server.js

@@ -8,7 +8,7 @@
 //-----------------------------------------------------------------------------
 
 import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
-import { z } from "zod";
+import { z } from "zod/v3";
 import { ESLint } from "eslint";
 
 //-----------------------------------------------------------------------------
@@ -29,10 +29,13 @@ const filePathsSchema = {
 // Tools
 //-----------------------------------------------------------------------------
 
-mcpServer.tool(
+mcpServer.registerTool(
 	"lint-files",
-	"Lint files using ESLint. You must provide a list of absolute file paths to the files you want to lint. The absolute file paths should be in the correct format for your operating system (e.g., forward slashes on Unix-like systems, backslashes on Windows).",
-	filePathsSchema,
+	{
+		description:
+			"Lint files using ESLint. You must provide a list of absolute file paths to the files you want to lint. The absolute file paths should be in the correct format for your operating system (e.g., forward slashes on Unix-like systems, backslashes on Windows).",
+		inputSchema: filePathsSchema,
+	},
 	async ({ filePaths }) => {
 		const eslint = new ESLint({
 			// enable lookup from file rather than from cwd

packages/mcp/tests/mcp-server.test.js

@@ -23,6 +23,8 @@ const passingFilePath = path.join(dirname, "fixtures", "passing.js");
 const syntaxErrorFilePath = path.join(dirname, "fixtures", "syntax-error.js");
 
 const filePathsJsonSchema = {
+	$schema: "http://json-schema.org/draft-07/schema#",
+	additionalProperties: false,
 	properties: {
 		filePaths: {
 			items: {