def fasta func and rename of space

README.md

@@ -1,5 +1,5 @@
 ---
-title: MCP Chai1 Modal
+title: MCP Modal Protein Folding
 emoji: 🧬
 colorFrom: gray
 colorTo: green

app.py

@@ -11,6 +11,38 @@ from modal_app import app, chai1_inference, download_inference_dependencies, her
 
 # Definition of the tools for the MCP server 
 
+# Function to return a fasta file
+def return_fasta_file() -> str:
+    """Create a FASTA file from a protein sequence string.
+    
+    Args:
+        sequence (str): The protein sequence string
+        name (str, optional): The name/identifier for the sequence. Defaults to "PROTEIN"
+        output_file (str, optional): Path to save the FASTA file. If None, saves to default location.
+    
+    Returns:
+        str: Path to the created FASTA file
+    """
+    # Clean the sequence by removing whitespace and newlines
+    sequence = ''.join(sequence.split())
+    
+    # Set default name if none provided
+    if name is None:
+        name = "PROTEIN"
+    
+    # Create FASTA content
+    fasta_content = f">{name}\n{sequence}\n"
+    
+    # Set default output path if none provided
+    if output_file is None:
+        output_file = here / "inputs" / "chai1_custom_input.fasta"
+    
+    # Write the FASTA file
+    with open(output_file, "w") as f:
+        f.write(fasta_content)
+    
+    return str(output_file)
+
 # Function to create a custom JSON config file
 def create_custom_config(
     num_trunk_recycles: int = 3,