Document per-node Warp env requirement

agents/openclaw-main/warp-acp-ops.md

@@ -10,6 +10,12 @@ Primary secret file:
 
 - `~/.openclaw/.env`
 
+Cluster rule:
+
+- `mac-5`, `mac-6`, and `mac-7` must each keep a local `~/.openclaw/.env` if they may locally run Warp-backed ACP harnesses.
+- Do not rely on `mac-5` secrets propagating to `mac-6` / `mac-7` at runtime.
+- Wrapper scripts should always read the local machine's own `~/.openclaw/.env`.
+
 Current placeholder variables:
 
 - `WARP_INFINI_API_KEY`