add vm uncache command to clear the package cache

src/commands/vm.ts

@@ -71,4 +71,12 @@ export function register(program: Command) {
       await vm.destroy()
       console.log("✔ VM destroyed")
     })
+
+  vmCmd
+    .command("uncache")
+    .description("Clear the package cache (next create will re-download)")
+    .action(async () => {
+      const had = await vm.clearCache()
+      console.log(had ? "✔ Package cache cleared" : "No cache to clear")
+    })
 }

src/vm.ts

@@ -337,3 +337,10 @@ export async function destroy(): Promise<void> {
   await stop()
   await $`container delete ${CONTAINER_NAME}`.nothrow().quiet()
 }
+
+/** Clear the package cache so the next create re-downloads everything. */
+export async function clearCache(): Promise<boolean> {
+  const exists = await Bun.file(join(CACHE_DIR, 'bun')).exists()
+  await $`rm -rf ${CACHE_DIR}`.nothrow().quiet()
+  return exists
+}