fix(test): avoid scanning bundled build entries

test/scripts/bundled-plugin-build-entries.test.ts

@@ -1,3 +1,4 @@
+import { execFileSync } from "node:child_process";
 import fs from "node:fs";
 import path from "node:path";
 import { describe, expect, it } from "vitest";
@@ -74,6 +75,48 @@ describe("bundled plugin build entries", () => {
     expect(entries["extensions/telegram/telegram-ingress-worker.runtime"]).toBeUndefined();
   });
 
+  it("discovers repo plugin build entries without directory scans", () => {
+    const output = execFileSync(
+      process.execPath,
+      [
+        "--input-type=module",
+        "--eval",
+        `
+          import fs from "node:fs";
+          import { syncBuiltinESMExports } from "node:module";
+          const counts = { readdirSync: 0 };
+          const originalReaddirSync = fs.readdirSync;
+          fs.readdirSync = (...args) => {
+            counts.readdirSync += 1;
+            return originalReaddirSync(...args);
+          };
+          syncBuiltinESMExports();
+          const build = await import("./scripts/lib/bundled-plugin-build-entries.mjs");
+          const entries = build.listBundledPluginBuildEntries();
+          const artifacts = build.listBundledPluginPackArtifacts();
+          console.log(JSON.stringify({
+            artifacts: artifacts.length,
+            counts,
+            entries: Object.keys(entries).length,
+          }));
+        `,
+      ],
+      {
+        cwd: process.cwd(),
+        encoding: "utf8",
+      },
+    );
+    const payload = JSON.parse(output) as {
+      artifacts: number;
+      counts: { readdirSync: number };
+      entries: number;
+    };
+
+    expect(payload.entries).toBeGreaterThan(0);
+    expect(payload.artifacts).toBeGreaterThan(0);
+    expect(payload.counts.readdirSync).toBe(0);
+  });
+
   it("packs runtime core support packages without requiring plugin manifests", () => {
     const artifacts = listBundledPluginPackArtifacts();