refactor: dedupe cli config cron and install flows

src/plugins/hooks.before-agent-start.test.ts

@@ -7,6 +7,7 @@
  */
 import { beforeEach, describe, expect, it } from "vitest";
 import { createHookRunner } from "./hooks.js";
+import { addTestHook, TEST_PLUGIN_AGENT_CTX } from "./hooks.test-helpers.js";
 import { createEmptyPluginRegistry, type PluginRegistry } from "./registry.js";
 import type { PluginHookBeforeAgentStartResult, PluginHookRegistration } from "./types.js";
 
@@ -16,21 +17,16 @@ function addBeforeAgentStartHook(
   handler: () => PluginHookBeforeAgentStartResult | Promise<PluginHookBeforeAgentStartResult>,
   priority?: number,
 ) {
-  registry.typedHooks.push({
+  addTestHook({
+    registry,
     pluginId,
     hookName: "before_agent_start",
-    handler,
+    handler: handler as PluginHookRegistration["handler"],
     priority,
-    source: "test",
-  } as PluginHookRegistration);
+  });
 }
 
-const stubCtx = {
-  agentId: "test-agent",
-  sessionKey: "sk",
-  sessionId: "sid",
-  workspaceDir: "/tmp",
-};
+const stubCtx = TEST_PLUGIN_AGENT_CTX;
 
 describe("before_agent_start hook merger", () => {
   let registry: PluginRegistry;