Support multiline chat input.

ra_aid/prompts.py

@@ -341,4 +341,5 @@ Exit Criteria:
 Remember:
     - Always begin by calling ask_human.
     - Always ask_human before finalizing or exiting.
+    - Never announce that you are going to ask the human, just do it.
 """

ra_aid/tools/human.py

@@ -1,13 +1,23 @@
-"""Tool for asking questions to the human user."""
-
 from langchain_core.tools import tool
+from prompt_toolkit import PromptSession
+from prompt_toolkit.key_binding import KeyBindings
 from rich.console import Console
-from rich.prompt import Prompt
 from rich.panel import Panel
 from rich.markdown import Markdown
 
 console = Console()
 
+def create_keybindings():
+    """Create custom key bindings for Ctrl+D submission."""
+    bindings = KeyBindings()
+
+    @bindings.add('c-d')
+    def submit(event):
+        """Trigger submission when Ctrl+D is pressed."""
+        event.current_buffer.validate_and_handle()
+
+    return bindings
+
 @tool
 def ask_human(question: str) -> str:
     """Ask the human user a question with a nicely formatted display.
@@ -19,10 +29,22 @@ def ask_human(question: str) -> str:
         The user's response as a string
     """
     console.print(Panel(
-        Markdown(question),
+        Markdown(question + "\n\n*Multiline input is supported; use Ctrl+D to submit. Use Ctrl+C to exit the program.*"),
         title="💭 Question for Human",
         border_style="yellow bold"
     ))
-    response = Prompt.ask("\nYour response")
+
+    session = PromptSession(
+        multiline=True,
+        key_bindings=create_keybindings(),
+        prompt_continuation='. ',
+        vi_mode=True  # Enable Vi mode for more intuitive Ctrl+D behavior
+    )
+
+    response = session.prompt(
+        "> ",
+        wrap_lines=True
+    )
+
     print()
     return response