From c8a4977378a01cefe0c98d84161f3caa49bdfa4c Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Sun, 22 Feb 2026 12:29:53 +0000
Subject: [PATCH] test: replace mtime sleep with explicit utimes bump

---
 src/agents/workspace.bootstrap-cache.test.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/agents/workspace.bootstrap-cache.test.ts b/src/agents/workspace.bootstrap-cache.test.ts
index c08f74fa3..a41bafe4a 100644
--- a/src/agents/workspace.bootstrap-cache.test.ts
+++ b/src/agents/workspace.bootstrap-cache.test.ts
@@ -47,6 +47,7 @@ describe("workspace bootstrap file caching", () => {
   it("invalidates cache when mtime changes", async () => {
     const content1 = "# Initial content";
     const content2 = "# Updated content";
+    const filePath = path.join(workspaceDir, DEFAULT_AGENTS_FILENAME);
 
     await writeWorkspaceFile({
       dir: workspaceDir,
@@ -58,15 +59,15 @@ describe("workspace bootstrap file caching", () => {
     const agentsFile1 = await loadAgentsFile(workspaceDir);
     expectAgentsContent(agentsFile1, content1);
 
-    // Wait a bit to ensure mtime will be different
-    await new Promise((resolve) => setTimeout(resolve, 10));
-
     // Modify the file
     await writeWorkspaceFile({
       dir: workspaceDir,
       name: DEFAULT_AGENTS_FILENAME,
       content: content2,
     });
+    // Some filesystems have coarse mtime precision; bump it explicitly.
+    const bumpedTime = new Date(Date.now() + 1_000);
+    await fs.utimes(filePath, bumpedTime, bumpedTime);
 
     // Second load should detect the change and return new content
     const agentsFile2 = await loadAgentsFile(workspaceDir);