diff --git a/quest/m1/test-flakes-2/README.md b/quest/m1/test-flakes-2/README.md
index 1241652fb1d..d1dbd9833ff 100644
--- a/quest/m1/test-flakes-2/README.md
+++ b/quest/m1/test-flakes-2/README.md
@@ -36,6 +36,15 @@ hit it.
 
 Public API: none. Wire: none.
 
+Baseline on 2026-10-19, before those three children were planned: one
+`just check --all` run passed on the source tree at `48c8a66ddd` (Rust
+default 8,943 tests, net-feature 1,025, capture 515, playback 217, Python
+102, JS workspace tests). Swift skipped on this Linux host; the media/browser
+harness was not run. It used the pinned Nix shell with CPU affinity 0-3 and
+Cargo and nextest concurrency two, at a sampled one-minute load of about 1.6
+to 6.1 on 16 cores. No new flake reproduced, but this single unsaturated run
+does not count toward the loaded-host runs, which still follow the children.
+
 ## Required
 
 - [moq-tokio redial tests](/quest/m1/test-flakes-2/tokio-redial.md) - the two redial tests stop assuming a dropped port stays free and stop racing 10 s deadlines