From 14be21db152583cae3da89aa0ff3963451750c92 Mon Sep 17 00:00:00 2001
From: claude <claude@session>
Date: Mon, 20 Jul 2026 20:43:32 +0000
Subject: [PATCH] =?UTF-8?q?feat(bench):=20PLAIN=5FONLY=20knob=20=E2=80=94?=
 =?UTF-8?q?=20skip=20causal=20cells=20for=20concurrency=20sweeps?=
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The c=64 matrix run (job 7dbc1ede) showed plain-mode parity but a 2.2x ka
latency penalty; the decisive test is a CONNS sweep, which only needs the
plain cells. PLAIN_ONLY=1 skips the two causal cells; the summary already
tolerates their absence.
---
 scripts/ka-close-matrix.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/ka-close-matrix.sh b/scripts/ka-close-matrix.sh
index 3132e95..30d7691 100755
--- a/scripts/ka-close-matrix.sh
+++ b/scripts/ka-close-matrix.sh
@@ -144,8 +144,10 @@ run_causal() { # $1=mode $2=port
 # ---- matrix --------------------------------------------------------------
 run_plain  ka    "$BASE_PORT"
 run_plain  close "$((BASE_PORT + 1))"
-run_causal ka    "$((BASE_PORT + 2))"
-run_causal close "$((BASE_PORT + 3))"
+if [ "${PLAIN_ONLY:-0}" != 1 ]; then
+  run_causal ka    "$((BASE_PORT + 2))"
+  run_causal close "$((BASE_PORT + 3))"
+fi
 
 # ---- summary -------------------------------------------------------------
 say "=== SUMMARY ==="