diff --git a/src/config/editorconfig/index.js b/src/config/editorconfig/index.js
index 7a5384a33..6b3537867 100644
--- a/src/config/editorconfig/index.js
+++ b/src/config/editorconfig/index.js
@@ -6,6 +6,13 @@ import {
 } from "../find-project-root.js";
 import editorConfigToPrettier from "./editorconfig-to-prettier.js";
 
+/**
+@typedef {ReturnType<editorConfigToPrettier>} EditorConfig
+*/
+
+/**
+@type {Map<string, Promise<EditorConfig>>}
+*/
 const editorconfigCache = new Map();
 
 function clearEditorconfigCache() {
@@ -22,9 +29,9 @@ async function loadEditorconfigInternal(file, { shouldCache }) {
 }
 
 /**
- * @param {string} file
- * @param {{shouldCache?: boolean}} options
- */
+@param {string} file
+@param {{shouldCache?: boolean}} options
+*/
 function loadEditorconfig(file, { shouldCache }) {
   file = path.resolve(file);
 
diff --git a/src/config/resolve-config.js b/src/config/resolve-config.js
index d817c6f82..44fb6017c 100644
--- a/src/config/resolve-config.js
+++ b/src/config/resolve-config.js
@@ -17,6 +17,13 @@ function clearCache() {
   clearEditorconfigCache();
 }
 
+/**
+@param {string} file
+@param {{
+  editorconfig?: boolean,
+  useCache?: boolean,
+}} options
+*/
 function loadEditorconfig(file, options) {
   if (!file || !options.editorconfig) {
     return;
@@ -26,6 +33,17 @@ function loadEditorconfig(file, options) {
   return loadEditorconfigForFile(file, { shouldCache });
 }
 
+/**
+@param {string} file
+@param {{
+  useCache?: boolean,
+  config?: string | URL
+}} options
+@returns {{
+  config: any,
+  configFile: string,
+} | void}
+*/
 async function loadPrettierConfig(file, options) {
   const shouldCache = options.useCache;
   let configFile = options.config;
@@ -45,6 +63,10 @@ async function loadPrettierConfig(file, options) {
   return { config, configFile };
 }
 
+/**
+@param {string | URL} fileUrlOrPath
+@param {*} options
+*/
 async function resolveConfig(fileUrlOrPath, options) {
   options = { useCache: true, ...options };
   const filePath = toPath(fileUrlOrPath);
@@ -74,6 +96,9 @@ async function resolveConfig(fileUrlOrPath, options) {
   return merged;
 }
 
+/**
+@param {string | URL} fileUrlOrPath
+*/
 async function resolveConfigFile(fileUrlOrPath) {
   const directory = fileUrlOrPath
     ? path.dirname(path.resolve(toPath(fileUrlOrPath)))