From 79b9963c750834ae707281eb79e1a44edcebdc8b Mon Sep 17 00:00:00 2001
From: Florent Tapponnier <160007691+Flotapponnier@users.noreply.github.com>
Date: Tue, 1 Sep 2026 20:35:33 +0200
Subject: [PATCH] =?UTF-8?q?fix(bench-243):=20prod=20is=20Singapore-only=20?=
 =?UTF-8?q?=E2=80=94=20no=20dims=20inherited=20from=20snapshot,=20abstract?=
 =?UTF-8?q?=20names=20the=20probe=20region?=
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(cherry picked from commit 9555bb76079c70f8d673d82c33dab1112fcab4fa)
---
 src/lib/spec.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/lib/spec.ts b/src/lib/spec.ts
index d873e51a2..fd55092d4 100644
--- a/src/lib/spec.ts
+++ b/src/lib/spec.ts
@@ -131,8 +131,12 @@ export function overlayEditorial(stored: Benchmark, spec: Spec): Benchmark {
     // too so newly added dimension values (e.g. region opts added to
     // an existing bench) surface immediately on the compare matrix
     // and the bench page filters without waiting on the materialise
-    // worker to rewrite the snapshot.
-    dimensions: spec.dimensions ?? stored.dimensions,
+    // worker to rewrite the snapshot. No `?? stored` fallback: the
+    // live YAML is the source of truth, so a spec that declares NO
+    // dimensions must not inherit tabs from a snapshot written by a
+    // worker running a divergent branch (keyed-rpc-robinhood: main is
+    // Singapore-only while dev/worker carries the region dims).
+    dimensions: spec.dimensions,
     // provider_notes is a YAML editorial declaration: drives the
     // per-provider chip rendered next to the name in the ranking row.
     // Overlay so newly added notes surface immediately without waiting