Reset tip edge cases

src/deepagents_rl/train/swe_env.py

@@ -422,11 +422,13 @@ class DeepAgentSWEEnv:
         )
         # TRL appends this string to the last user message — force tool use.
         return (
-            "\n\nCRITICAL: Use structured tool/function calls only. "
-            "Your first action MUST be: ls with path='.' (repo root). "
-            "Do NOT call ls on 'src' — that folder often does not exist. "
-            "Then read_file/grep using paths from that listing, then edit_file/write_file. "
-            "Do not answer with a text-only plan. When the fix is applied, stop tools and say DONE."
+            "\n\nCRITICAL REMINDER (edge cases):\n"
+            "- Use structured tool/function calls only (not markdown ```json``` blobs).\n"
+            "- FIRST tool call MUST be ls with path='.' (repo root). Never ls 'src'/'lib'/'app'.\n"
+            "- Only read_file/edit_file paths that appeared in ls/glob output.\n"
+            "- Prefer edit_file with unique old_string; keep the diff minimal.\n"
+            "- If a path is missing, ls '.' again and pivot — do not retry the same missing path.\n"
+            "- When done editing, stop tools and reply: DONE <summary>."
         )
 
     def _cleanup(self) -> None: