diff --git a/src/Netclaw.Cli.Tests/Doctor/MemoryCurationLlmDoctorCheckTests.cs b/src/Netclaw.Cli.Tests/Doctor/MemoryCurationLlmDoctorCheckTests.cs
new file mode 100644
index 000000000..220d3b8a8
--- /dev/null
+++ b/src/Netclaw.Cli.Tests/Doctor/MemoryCurationLlmDoctorCheckTests.cs
@@ -0,0 +1,48 @@
+// -----------------------------------------------------------------------
+// <copyright file="MemoryCurationLlmDoctorCheckTests.cs" company="Petabridge, LLC">
+//      Copyright (C) 2026 - 2026 Petabridge, LLC <https://petabridge.com>
+// </copyright>
+// -----------------------------------------------------------------------
+using Microsoft.Extensions.Time.Testing;
+using Netclaw.Cli.Doctor;
+using Netclaw.Configuration;
+using Netclaw.Tests.Utilities;
+using Xunit;
+
+namespace Netclaw.Cli.Tests.Doctor;
+
+public sealed class MemoryCurationLlmDoctorCheckTests : IDisposable
+{
+    private readonly DisposableTempDir _temp = new();
+
+    public void Dispose() => _temp.Dispose();
+
+    [Fact]
+    public async Task Reads_and_classifies_log_while_daemon_keeps_it_open_for_append()
+    {
+        var paths = new NetclawPaths(_temp.Path);
+        paths.EnsureDirectoriesExist();
+
+        var logPath = Path.Combine(paths.LogsDirectory, "daemon-2026-05-20.log");
+        using var writerStream = new FileStream(
+            logPath,
+            FileMode.Append,
+            FileAccess.Write,
+            FileShare.ReadWrite | FileShare.Delete);
+        using var writer = new StreamWriter(writerStream);
+        writer.WriteLine("curation_llm_decision");
+        writer.WriteLine("curation_llm_timeout");
+        writer.Flush();
+
+        var time = new FakeTimeProvider(
+            new DateTimeOffset(2026, 5, 20, 12, 0, 0, TimeSpan.Zero));
+        var result = await new MemoryCurationLlmDoctorCheck(paths, time)
+            .RunAsync(TestContext.Current.CancellationToken);
+
+        Assert.Equal("Memory Curation LLM", result.Name);
+        Assert.Equal(DoctorSeverity.Warning, result.Severity);
+        // The percent text follows the current culture ("50%" or "50 %"), so
+        // check the counts, which do not change with the culture.
+        Assert.Contains("(1/2)", result.Message);
+    }
+}
diff --git a/src/Netclaw.Cli/Doctor/MemoryCurationLlmDoctorCheck.cs b/src/Netclaw.Cli/Doctor/MemoryCurationLlmDoctorCheck.cs
index 0237fb14e..d5b7920b6 100644
--- a/src/Netclaw.Cli/Doctor/MemoryCurationLlmDoctorCheck.cs
+++ b/src/Netclaw.Cli/Doctor/MemoryCurationLlmDoctorCheck.cs
@@ -60,7 +60,12 @@ private async Task<DoctorCheckResult> RunCoreAsync(CancellationToken cancellatio
                     continue;
 
                 cancellationToken.ThrowIfCancellationRequested();
-                using var reader = new StreamReader(file);
+                using var stream = new FileStream(
+                    file,
+                    FileMode.Open,
+                    FileAccess.Read,
+                    FileShare.ReadWrite | FileShare.Delete);
+                using var reader = new StreamReader(stream);
                 while (await reader.ReadLineAsync(cancellationToken) is { } line)
                 {
                     // Failure markers first: none of them contains the success