update readme and installer

scripts/install.ts

@@ -42,6 +42,7 @@ const pluginSchema = z.union([z.string(), entrySchema]);
 const registrationSchema = z
     .union([z.string().transform((packageName) => ({ package: packageName })), entrySchema])
     .pipe(entrySchema);
+const experimentalSchema = z.object({ subagent_depth: z.number().optional() }).catchall(z.json());
 const configSchema = z
     .object({ plugins: z.array(pluginSchema).optional(), $schema: z.string().optional() })
     .catchall(z.json());
@@ -145,11 +146,18 @@ export async function install(source: string, config: string, selection?: string
     const first = configured.findIndex((entry) => isOwned(entry.package));
     const next = entries.filter((_entry, index) => !isOwned(configured[index]!.package));
     next.splice(first < 0 ? next.length : first, 0, ...registrations);
-    const updated = {
+    const updated: z.infer<typeof configSchema> = {
         ...current,
         $schema: current.$schema ?? "https://opencode.ai/config.json",
         plugins: next,
     };
+    // Coordinate delegates to workers from Multi-work children, so routing needs depth >= 2.
+    const experimental = experimentalSchema.safeParse(current.experimental ?? {});
+    if (selected.includes("agents") && experimental.success)
+        updated.experimental = {
+            ...experimental.data,
+            subagent_depth: Math.max(experimental.data.subagent_depth ?? 0, 2),
+        };
     const parent = join(config, "plugins");
     await mkdir(parent, { recursive: true });
     const staged = join(parent, `.stanp-opencode.new.${process.pid}`);