diff --git a/open-sse/config/appConstants.js b/open-sse/config/appConstants.js
index 4df1463e..106cba50 100644
--- a/open-sse/config/appConstants.js
+++ b/open-sse/config/appConstants.js
@@ -178,6 +178,7 @@ export const CLAUDE_SYSTEM_PROMPT = "You are Claude Code, Anthropic's official C
 // makes the backend flag the request and answer 429 Quota Exhausted.
 export const ANTIGRAVITY_PROMPT_REWRITES = [
   { from: "You are a Claude agent, built on Anthropic's Claude Agent SDK.", to: "" },
+  { from: /You are Hermes Agent,\s*(an intelligent AI assistant)(?: created by Nous Research)?\./gi, to: "You are Hermes Agent. You are $1." },
   { from: /opencode/gi, to: (m) => (m === "OpenCode" ? "Antigravity" : m === "OPENCODE" ? "ANTIGRAVITY" : "antigravity") }
 ];