diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..808bf7e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,13 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 2
+
+# Markdown uses trailing whitespace for hard line breaks.
+[*.md]
+trim_trailing_whitespace = false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bf9c562..b378ca0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version-file: '.nvmrc'
           cache: 'npm'
 
       - name: Install dependencies
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 67a60a0..cb9372e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version-file: '.nvmrc'
           registry-url: 'https://registry.npmjs.org'
 
       # Trusted Publishing requires npm >= 11.5.1; Node 20 ships with npm 10.x.
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..2bd5a0a
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+22