remove ESC key handling complexity; ctrl+c still cancels generation (#519)

* remove ESC key handling complexity; ctrl+c still cancels generation

* opus 4.5 support

* opus 4.5

Author: evalstate

src/fast_agent/llm/model_database.py

@@ -271,6 +271,7 @@ class ModelDatabase:
         "claude-sonnet-4-5-20250929": ANTHROPIC_SONNET_4_VERSIONED,
         "claude-opus-4-0": ANTHROPIC_OPUS_4_VERSIONED,
         "claude-opus-4-1": ANTHROPIC_OPUS_4_VERSIONED,
+        "claude-opus-4-5": ANTHROPIC_OPUS_4_VERSIONED,
         "claude-opus-4-20250514": ANTHROPIC_OPUS_4_VERSIONED,
         "claude-haiku-4-5-20251001": ANTHROPIC_SONNET_4_VERSIONED,
         "claude-haiku-4-5": ANTHROPIC_SONNET_4_VERSIONED,

src/fast_agent/llm/model_factory.py

@@ -84,6 +84,7 @@ class ModelFactory:
         "claude-3-opus-latest": Provider.ANTHROPIC,
         "claude-opus-4-0": Provider.ANTHROPIC,
         "claude-opus-4-1": Provider.ANTHROPIC,
+        "claude-opus-4-5": Provider.ANTHROPIC,
         "claude-opus-4-20250514": Provider.ANTHROPIC,
         "claude-sonnet-4-20250514": Provider.ANTHROPIC,
         "claude-sonnet-4-0": Provider.ANTHROPIC,
@@ -115,13 +116,14 @@ class ModelFactory:
         "sonnet45": "claude-sonnet-4-5",
         "sonnet35": "claude-3-5-sonnet-latest",
         "sonnet37": "claude-3-7-sonnet-latest",
-        "claude": "claude-sonnet-4-0",
+        "claude": "claude-sonnet-4-5",
         "haiku": "claude-haiku-4-5",
         "haiku3": "claude-3-haiku-20240307",
         "haiku35": "claude-3-5-haiku-latest",
         "hauku45": "claude-haiku-4-5",
-        "opus": "claude-opus-4-1",
+        "opus": "claude-opus-4-5",
         "opus4": "claude-opus-4-1",
+        "opus45": "claude-opus-4-5",
         "opus3": "claude-3-opus-latest",
         "deepseekv3": "deepseek-chat",
         "deepseek": "deepseek-chat",

src/fast_agent/ui/interactive_prompt.py

@@ -14,13 +14,10 @@
     )
 """
 
-import asyncio
-import sys
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Awaitable, Callable, Union, cast
 
 from fast_agent.constants import CONTROL_MESSAGE_SAVE_HISTORY
-from fast_agent.ui.keyboard_interrupt import run_with_esc_cancel
 
 if TYPE_CHECKING:
     from fast_agent.core.agent_app import AgentApp
@@ -333,17 +330,8 @@ async def prompt_loop(
                 if user_input == "":
                     continue
 
-            # Send the message to the agent with ESC cancellation support
-            # Only enable ESC cancellation if we're in an interactive terminal
-            if sys.stdin.isatty():
-                try:
-                    result = await run_with_esc_cancel(send_func(user_input, agent))
-                except asyncio.CancelledError:
-                    rich_print("\n[yellow]Request cancelled by user (ESC)[/yellow]")
-                    result = "[Cancelled]"
-                    continue
-            else:
-                result = await send_func(user_input, agent)
+            # Send the message to the agent
+            result = await send_func(user_input, agent)
 
         return result