From 5ae875a491ef6433e61920e208e67680ac295f14 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 13 Apr 2026 21:03:06 +0000
Subject: [PATCH 1/2] Initial plan


From 919fd3c87f56510d856ed1bbf46654ffafe11f7e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 13 Apr 2026 21:14:45 +0000
Subject: [PATCH 2/2] fix: close REPL servers after each test to prevent Jest
 worker from hanging

Agent-Logs-Url: https://github.com/counterfact/api-simulator/sessions/6ff99a5b-2b06-4f18-b2a7-2b880122ff00
---
 .changeset/fix-jest-open-handles.md |  5 +++++
 test/repl/repl.test.ts              | 14 +++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/fix-jest-open-handles.md

diff --git a/.changeset/fix-jest-open-handles.md b/.changeset/fix-jest-open-handles.md
new file mode 100644
index 000000000..ed48bbd81
--- /dev/null
+++ b/.changeset/fix-jest-open-handles.md
@@ -0,0 +1,5 @@
+---
+"counterfact": patch
+---
+
+Fix Jest worker process failing to exit gracefully by closing REPL servers after each test in the repl test suite.
diff --git a/test/repl/repl.test.ts b/test/repl/repl.test.ts
index bebc0beb9..18887c1ad 100644
--- a/test/repl/repl.test.ts
+++ b/test/repl/repl.test.ts
@@ -1,6 +1,6 @@
 import type { REPLServer } from "node:repl";
 
-import { jest } from "@jest/globals";
+import { afterEach, jest } from "@jest/globals";
 
 import { createCompleter, startRepl } from "../../src/repl/repl.js";
 import type { CompleterCallback } from "../../src/repl/repl.js";
@@ -101,9 +101,21 @@ function createHarness(scenarioRegistry?: ScenarioRegistry) {
     scenarioRegistry,
   );
 
+  openServers.push(harness.server);
+
   return { config, contextRegistry, harness, registry };
 }
 
+const openServers: REPLServer[] = [];
+
+afterEach(() => {
+  for (const server of openServers) {
+    server.close();
+  }
+
+  openServers.length = 0;
+});
+
 describe("REPL", () => {
   it("turns on the proxy globally", () => {
     const { config, harness } = createHarness();