diff --git a/hw/straylight/default.nix b/hw/straylight/default.nix
index 07c929f..9db292d 100644
--- a/hw/straylight/default.nix
+++ b/hw/straylight/default.nix
@@ -49,7 +49,11 @@ let
     spec-draft-n-max = 4
     cache-type-k-draft = f16
     cache-type-v-draft = f16
-    parallel = 1
+    ; Two slots sharing one unified 131072-token KV pool: a second request (subagent,
+    ; another client) runs alongside instead of queueing, and either one may still use
+    ; the full 131072 as long as their combined context fits.
+    parallel = 2
+    kv-unified = true
     ctx-size = 131072
 
     ; Previous default model (a Qwen 3.5 derivative), kept for comparison runs. It was