Loosen plugin id rule (todo §2); allow digits and dashes anywhere (^[a-z0-9-]+$)

src/plugin.test.ts

@@ -36,9 +36,11 @@ test("definePlugin returns the manifest unchanged — id/mount come from the fol
   assert.equal(scheduling.routes?.length, 3);
 });
 
-test("isValidPluginId accepts kebab-case folder names and rejects everything else", () => {
-  for (const ok of ["scheduling", "people", "people-directory"]) assert.ok(isValidPluginId(ok), ok);
-  for (const bad of ["People", "people_dir", "people-", "-people", "people--dir", "people1", "", "a/b"]) {
+test("isValidPluginId accepts lowercase/digits/dashes anywhere and rejects everything else", () => {
+  for (const ok of ["scheduling", "people-directory", "people2", "v2", "people--dir", "-people", "people-", "a-1-b", "1"]) {
+    assert.ok(isValidPluginId(ok), ok);
+  }
+  for (const bad of ["People", "people_dir", "a/b", "a.b", "a b", ""]) {
     assert.ok(!isValidPluginId(bad), bad);
   }
 });

src/plugin.ts

@@ -71,10 +71,10 @@ export function definePlugin(manifest: PluginManifest): PluginManifest {
   return manifest;
 }
 
-// A plugin id (its folder name) — lowercase letters in dash-separated segments: no digits,
-// uppercase, or leading/trailing/double dashes. Tight on purpose: the id forms the mount path
-// `/<id>`, the view/static namespace, and the central-override target.
-const PLUGIN_ID = /^[a-z]+(?:-[a-z]+)*$/;
+// A plugin id (its folder name) — lowercase a–z, digits, and dashes, dashes allowed anywhere.
+// Rejects uppercase, underscores, dots, slashes, spaces: the id forms the mount path `/<id>`,
+// the view/static namespace, and the central-override target, so it must stay URL/path-safe.
+const PLUGIN_ID = /^[a-z0-9-]+$/;
 
 export function isValidPluginId(id: string): boolean {
   return PLUGIN_ID.test(id);