diff --git a/docs/superpowers/specs/2026-05-09-l4d2-server-host-perf-baseline-design.md b/docs/superpowers/specs/2026-05-09-l4d2-server-host-perf-baseline-design.md
index 04b9190..196dfc0 100644
--- a/docs/superpowers/specs/2026-05-09-l4d2-server-host-perf-baseline-design.md
+++ b/docs/superpowers/specs/2026-05-09-l4d2-server-host-perf-baseline-design.md
@@ -115,12 +115,12 @@ IOWeight=10
 
 ### Sandbox slice + OOM placement
 
-Edit `deploy/files/usr/local/libexec/left4me/left4me-script-sandbox` to add to the `systemd-run --scope` invocation:
+Edit `deploy/files/usr/local/libexec/left4me/left4me-script-sandbox` to add to the `systemd-run` invocation (transient service mode — the existing helper uses `--unit=` without `--scope`):
 
 - `--slice=l4d2-build.slice`
 - `-p OOMScoreAdjust=500`
 
-Existing `CPUQuota=200%` and `RuntimeMaxSec=3600` stay. Cgroup weight (slice) and CPU quota (per-scope) compose: weight handles contention, quota handles the absolute ceiling.
+Existing `CPUQuota=200%` and `RuntimeMaxSec=3600` stay. Cgroup weight (slice) and CPU quota (per-unit) compose: weight handles contention, quota handles the absolute ceiling.
 
 ### Host sysctls