diff --git a/nix/templates/harness-base.nix b/nix/templates/harness-base.nix
index dfc9bde..359adc3 100644
--- a/nix/templates/harness-base.nix
+++ b/nix/templates/harness-base.nix
@@ -525,15 +525,11 @@
       };
       environment.LINKS_JSON = builtins.toJSON config.hyperhive.dashboardLinks;
       script = ''
-        STATE_DIR=""
-        for d in /state /agents/*/state; do
-          if [ -d "$d" ]; then
-            STATE_DIR="$d"
-            break
-          fi
-        done
-        if [ -z "$STATE_DIR" ]; then
-          echo "hive-dashboard-links: no state dir found; skipping"
+        # Sub-agents have their state dir bind-mounted at /agents/<name>/state.
+        # Use a glob — exactly one match per container at runtime.
+        STATE_DIR=$(echo /agents/*/state)
+        if [ ! -d "$STATE_DIR" ]; then
+          echo "hive-dashboard-links: no state dir found at /agents/*/state; skipping"
           exit 0
         fi
         printf '%s' "$LINKS_JSON" > "$STATE_DIR/hyperhive-dashboard-links.json"