diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..44c738b
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,6 @@
+legal/THIRD_PARTY.md
+CHANGELOG.md
+**/graphql/schema.json
+package-lock.json
+/doc/
+/.atomist/
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..623aae8
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,11 @@
+{
+  "overrides": [
+    {
+      "files": ["*.md", "*.markdown"],
+      "options": {
+        "proseWrap": "always",
+        "tabWidth": 4
+      }
+    }
+  ]
+}