From 3dfbd145084fb8b6ade71991b94e58a24b5d098a Mon Sep 17 00:00:00 2001
From: Simon Cruanes <simon.cruanes.2007@m4x.org>
Date: Sat, 20 Dec 2025 23:00:13 -0500
Subject: [PATCH] doc

---
 src/client/sync/io_sync.mli | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/client/sync/io_sync.mli b/src/client/sync/io_sync.mli
index 303a099e..883efaa0 100644
--- a/src/client/sync/io_sync.mli
+++ b/src/client/sync/io_sync.mli
@@ -1,2 +1,4 @@
+(** Synchronous IOs, with threads for concurrency *)
+
 include Generic_io.S_WITH_CONCURRENCY with type 'a t = 'a
 (** Generic IO with [spawn] starting a background thread *)