diff --git a/ra_aid/console/__init__.py b/ra_aid/console/__init__.py
index e6680cd..757483d 100644
--- a/ra_aid/console/__init__.py
+++ b/ra_aid/console/__init__.py
@@ -1,4 +1,4 @@
-from .formatting import print_stage_header, print_task_header
+from .formatting import print_stage_header, print_task_header, print_error, console
 from .output import print_agent_output
 
-__all__ = ['print_stage_header', 'print_task_header', 'print_agent_output']
+__all__ = ['print_stage_header', 'print_task_header', 'print_agent_output', 'console', 'print_error']
diff --git a/ra_aid/prompts.py b/ra_aid/prompts.py
index 6258b7d..d64a53e 100644
--- a/ra_aid/prompts.py
+++ b/ra_aid/prompts.py
@@ -196,7 +196,10 @@ Instructions:
 4. Use delete_key_facts to remove any key facts that no longer apply.
 5. Do not add features not explicitly required.
 6. Only create or modify files directly related to this task.
-7. For trivial changes, use sed and awk judiciously via the run_shell_command tool.
+
+Testing:
+
+- If your task involves writing unit tests, first inspect existing test suites and analyze at least one existing test to learn about testing organization and conventions.
 
 Once the task is complete, ensure all updated files are emitted.
 """
diff --git a/ra_aid/tools/file_str_replace.py b/ra_aid/tools/file_str_replace.py
index debe583..af430e6 100644
--- a/ra_aid/tools/file_str_replace.py
+++ b/ra_aid/tools/file_str_replace.py
@@ -1,6 +1,37 @@
 from langchain_core.tools import tool
 from typing import Dict
 from pathlib import Path
+from rich.panel import Panel
+from ra_aid.console import console
+from ra_aid.console.formatting import print_error
+
+def truncate_display_str(s: str, max_length: int = 30) -> str:
+    """Truncate a string for display purposes if it exceeds max length.
+    
+    Args:
+        s: String to truncate
+        max_length: Maximum length before truncating
+        
+    Returns:
+        Truncated string with ellipsis if needed
+    """
+    if len(s) <= max_length:
+        return s
+    return s[:max_length] + "..."
+
+def format_string_for_display(s: str, threshold: int = 30) -> str:
+    """Format a string for display, showing either quoted string or length.
+    
+    Args:
+        s: String to format
+        threshold: Max length before switching to character count display
+        
+    Returns:
+        Formatted string for display
+    """
+    if len(s) <= threshold:
+        return f"'{s}'"
+    return f'[{len(s)} characters]'
 
 @tool
 def file_str_replace(
@@ -24,23 +55,36 @@ def file_str_replace(
     try:
         path = Path(filepath)
         if not path.exists():
-            return {"success": False, "message": f"File not found: {filepath}"}
+            msg = f"File not found: {filepath}"
+            print_error(msg)
+            return {"success": False, "message": msg}
             
         content = path.read_text()
         count = content.count(old_str)
         
         if count == 0:
-            return {"success": False, "message": f"String not found: {old_str}"}
+            msg = f"String not found: {truncate_display_str(old_str)}"
+            print_error(msg)
+            return {"success": False, "message": msg}
         elif count > 1:
-            return {"success": False, "message": f"String appears {count} times - must be unique"}
+            msg = f"String appears {count} times - must be unique"
+            print_error(msg)
+            return {"success": False, "message": msg}
             
         new_content = content.replace(old_str, new_str)
         path.write_text(new_content)
         
+        console.print(Panel(
+            f"Replaced in {filepath}:\n{format_string_for_display(old_str)} → {format_string_for_display(new_str)}",
+            title="✓ String Replaced",
+            border_style="bright_blue"
+        ))
         return {
             "success": True,
             "message": f"Successfully replaced '{old_str}' with '{new_str}' in {filepath}"
         }
         
     except Exception as e:
-        return {"success": False, "message": f"Error: {str(e)}"}
+        msg = f"Error: {str(e)}"
+        print_error(msg)
+        return {"success": False, "message": msg}