test(server): keep provider fixture directories host-portable#9572

@@ -51,8 +53,25 @@ it.layer(NodeServices.layer)("Claude capability probe SDK boundary", (it) => {
       const tempDir = yield* fs.makeTempDirectoryScoped({ prefix: "t3-claude-probe-sdk-" });
       const executablePath = path.join(tempDir, "fake-claude.mjs");
       const invocationPath = path.join(tempDir, "invocation.json");
-      const workspaceCwd = path.join(tempDir, "workspace");
-      yield* fs.makeDirectory(workspaceCwd, { recursive: true });
+      // The probe aborts the SDK without awaiting the child's exit, and on
+      // Windows a directory that is still some process's cwd cannot be
+      // removed. Keep the workspace outside the scoped directory and let it
+      // go with a retrying removal once the child has gone.
+      const workspaceCwd = yield* fs.makeTempDirectory({ prefix: "t3-claude-probe-cwd-" });
+      // Node's own retry rather than an Effect schedule: it.effect runs on a
+      // TestClock, so a scheduled retry would wait for time nobody advances.
+      // If the child still holds the directory after that, an empty temp
+      // directory is left behind rather than failing the test for it.
+      yield* Effect.addFinalizer(() =>
+        Effect.promise(() =>
+          NodeFSP.rm(workspaceCwd, {
+            recursive: true,
+            force: true,
+            maxRetries: 20,
+            retryDelay: 250,
+          }).catch(() => undefined),
+        ),
+      );