diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 000000000..0123ad6ba
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,23 @@
+# EditorConfig — Phenotype org canonical
+# https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.{rs,toml,py,go,md,yaml,yml,json,html,css,scss}]
+indent_size = 4
+
+[*.{ts,tsx,js,jsx,mjs,cjs}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false  # trailing spaces = line break in Markdown