diff --git a/features/draft/vendor/README.md b/features/draft/vendor/README.md
new file mode 100644
index 00000000000..c9a4eb0e70f
--- /dev/null
+++ b/features/draft/vendor/README.md
@@ -0,0 +1,18 @@
+# Draft vendor features
+
+This directory is for features proposed by a browser vendor, to support the
+early use of web-features before there is a published web-features ID, and a
+way to transition from draft to published feature IDs.
+
+A draft vendor feature goes through these stages:
+
+- A bot creates a `.yml` file in this directory, with enough information for a
+  maintainer of web-features to follow up and act on. An `explainer` or `spec`
+  URL and a vendor-specific URL like `chromestatus` is recommended.
+- A web-features maintainer creates a real feature entry and replaces the draft
+  feature with a pointer to that feature.
+- References to the draft feature in vendor tools or source code are updated to
+  point to the final features.
+
+Write access for bots can be granted by web-features maintainers, and should
+only be used to create files in this directory.
diff --git a/index.ts b/index.ts
index cd9a441237b..135e8e4cc1a 100644
--- a/index.ts
+++ b/index.ts
@@ -45,10 +45,17 @@ function* yamlEntries(root: string): Generator<[string, any]> {
         // The feature identifier/key is the filename without extension.
         const { name: key } = path.parse(fp);
         const pathParts = fp.split(path.sep);
+        const isDraft = pathParts.includes('draft');
+        const isSpec = isDraft && pathParts.includes('spec');
+        const isVendor = isDraft && pathParts.includes('vendor');
+
+        if (isVendor) {
+            continue;
+        }
 
         // Assert ID uniqueness
         for (const [pool, map] of Object.entries(uniqueIdMaps)) {
-            if (!pathParts.includes("spec") && pathParts.includes(pool)) {
+            if (!isSpec && pathParts.includes(pool)) {
                 const otherFile: string | undefined = map.get(key);
                 if (otherFile) {
                     throw new Error(`ID collision between ${fp} and ${otherFile}`);
@@ -68,7 +75,7 @@ function* yamlEntries(root: string): Generator<[string, any]> {
             Object.assign(data, dist);
         }
 
-        if (pathParts.includes('draft')) {
+        if (isDraft) {
             data[draft] = true;
         }
 
diff --git a/scripts/dist.ts b/scripts/dist.ts
index 1832f6a4b89..a5365f1dbd9 100644
--- a/scripts/dist.ts
+++ b/scripts/dist.ts
@@ -410,6 +410,9 @@ const tagsToFeatures: Map<string, Feature[]> = (() => {
  * mistakes, such as `.yaml` files.
  */
 function isDistOrDistable(path: string): boolean {
+  if (path.startsWith("features/draft/vendor/")) {
+    return false;
+  }
   if (path.endsWith(".yaml.dist") || path.endsWith(".yaml")) {
     throw new Error(
       `YAML files must use .yml extension; ${path} has invalid extension`,