diff --git a/.gitea/workflows/nightly.yml b/.gitea/workflows/nightly.yml
index 8c958766..ec7deeae 100644
--- a/.gitea/workflows/nightly.yml
+++ b/.gitea/workflows/nightly.yml
@@ -22,7 +22,9 @@ on:
 
 concurrency:
   group: qemu                     # every workflow shares this one group: one run at a time,
-                                  # a runner-image rebuild included (Captain Bob, 2026-11-07)
+                                  # a runner-image rebuild included (2026-11-07); nothing
+                                  # cancelled -- runner.capacity: 1 explicit in config.yaml
+                                  # (FABRIC-3, 2026-11-11)
   cancel-in-progress: false
 
 jobs: