diff --git a/agent/prompt_builder.py b/agent/prompt_builder.py
index ee8ab868..2a210434 100644
--- a/agent/prompt_builder.py
+++ b/agent/prompt_builder.py
@@ -152,7 +152,13 @@ MEMORY_GUIDANCE = (
     "Do NOT save task progress, session outcomes, completed-work logs, or temporary TODO "
     "state to memory; use session_search to recall those from past transcripts. "
     "If you've discovered a new way to do something, solved a problem that could be "
-    "necessary later, save it as a skill with the skill tool."
+    "necessary later, save it as a skill with the skill tool.\n"
+    "Write memories as declarative facts, not instructions to yourself. "
+    "'User prefers concise responses' ✓ — 'Always respond concisely' ✗. "
+    "'Project uses pytest with xdist' ✓ — 'Run tests with pytest -n 4' ✗. "
+    "Imperative phrasing gets re-read as a directive in later sessions and can "
+    "cause repeated work or override the user's current request. Procedures and "
+    "workflows belong in skills, not memory."
 )
 
 SESSION_SEARCH_GUIDANCE = (