A note that the old handoff's environment note is now stale

HANDOFF-devtest-noise.md

@@ -86,6 +86,12 @@ should be reading on a green run.
 Baseline not regressed: `dune test --root .` exit 0, `spike/x86/survey.sh` 101 MATCH / 0 DIFFER / 0 refused,
 `spike/x86/cells.sh` 4/4.
 
+## One stale note left behind, deliberately not edited
+
+`HANDOFF-x86-rt.md` section 4 still tells the next lane that `dune test` prints those four lines as an environment
+note. That is no longer true. It is not corrected here because another lane holds that file and a conflict costs
+more than the sentence is worth — but a lane that reads it and goes hunting for the noise will not find any.
+
 ## Open questions
 
 - `Build.run` reports only `(exit N)` to the caller; clang's actual words reach the terminal and nothing else. The