test(tasks): guard task-registry import boundary (#57487)

* refactor(tasks): add executor facade

* refactor(tasks): extract delivery policy

* refactor(tasks): route acp through executor

* refactor(tasks): route subagents through executor

* refactor(cron): split main and detached dispatch

* refactor(tasks): guard executor-only producer writes

* refactor(tasks): clarify detached run surfaces

* test(tasks): guard task-registry import boundary

src/tasks/task-registry-import-boundary.test.ts

@@ -0,0 +1,45 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+
+const TASK_ROOT = path.resolve(import.meta.dirname);
+const SRC_ROOT = path.resolve(TASK_ROOT, "..");
+
+const ALLOWED_IMPORTERS = new Set([
+  "auto-reply/reply/commands-acp/runtime-options.ts",
+  "auto-reply/reply/commands-subagents/action-info.ts",
+  "commands/tasks.ts",
+  "tasks/task-executor.ts",
+  "tasks/task-registry.maintenance.ts",
+]);
+
+async function listSourceFiles(root: string): Promise<string[]> {
+  const entries = await fs.readdir(root, { withFileTypes: true });
+  const files: string[] = [];
+  for (const entry of entries) {
+    const fullPath = path.join(root, entry.name);
+    if (entry.isDirectory()) {
+      files.push(...(await listSourceFiles(fullPath)));
+      continue;
+    }
+    if (!entry.isFile() || !entry.name.endsWith(".ts") || entry.name.endsWith(".test.ts")) {
+      continue;
+    }
+    files.push(fullPath);
+  }
+  return files;
+}
+
+describe("task registry import boundary", () => {
+  it("keeps direct task-registry imports on the approved read-model seam", async () => {
+    const importers: string[] = [];
+    for (const file of await listSourceFiles(SRC_ROOT)) {
+      const relative = path.relative(SRC_ROOT, file).replaceAll(path.sep, "/");
+      const source = await fs.readFile(file, "utf8");
+      if (source.includes("task-registry.js")) {
+        importers.push(relative);
+      }
+    }
+    expect(importers.toSorted()).toEqual([...ALLOWED_IMPORTERS].toSorted());
+  });
+});