diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..752d05c
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,25 @@
+# EditorConfig — https://editorconfig.org
+# Top-most EditorConfig file
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 2
+
+# Markdown — trailing whitespace can be meaningful (hard line breaks)
+[*.md]
+trim_trailing_whitespace = false
+
+# Makefiles require real tabs
+[Makefile]
+indent_style = tab
+
+[*.{yml,yaml,json,jsonc}]
+indent_size = 2
+
+[*.{js,ts,vue,mjs,cjs}]
+indent_size = 2
diff --git a/.gitignore b/.gitignore
index da3f3a0..3204502 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,12 @@ coverage/
 .env
 .env.*
 !.env.example
+
+# IDE / editor
+.idea/
+.vscode/
+*.swp
+.DS_Store
 /.yarn
 /.superpowers
 /.yarn