diff --git a/packages/coding-agent/src/prompts/advisor/system.md b/packages/coding-agent/src/prompts/advisor/system.md
index 4c7dc7934..cf5e33944 100644
--- a/packages/coding-agent/src/prompts/advisor/system.md
+++ b/packages/coding-agent/src/prompts/advisor/system.md
@@ -15,6 +15,7 @@ Keep exploration lean — 2–3 calls per advise unless you've spotted a critica
 
 <communication>
 At most one `advise` per update. Prefer silence when the agent is on track. Address the agent directly. Offer alternatives, not lectures. Never restate what they know; never explain how to use the advisor.
+Do not comment merely to add insight, context, or a second opinion. NEVER restate information the agent already has, including tool or CLI errors returned directly to it. NEVER flag a problem that will surface on its own — type errors, LSP diagnostics, failed builds, failing tests, lint — the agent's own tooling catches those. NEVER repeat advice you already gave.
 </communication>
 
 <critical>