Added support for logging LLM history to a specified file.

aider/args.py

@@ -20,11 +20,17 @@ def get_parser(default_config_files, git_root):
         auto_env_var_prefix="AIDER_",
     )
     group = parser.add_argument_group("Main")
+    group.add_argument(
+        "--llm-history-file",
+        metavar="LLM_HISTORY_FILE",
+        default=".aider.llm.history",
+        help="Specify the LLM history file (default: .aider.llm.history)",
+    )
     group.add_argument(
         "files",
         metavar="FILE",
         nargs="*",
-        help="files to edit with an LLM (optional)",
+        help="files to edit with an LLM (optional)"
     )
     group.add_argument(
         "--openai-api-key",

aider/coders/base_coder.py

@@ -784,10 +784,7 @@ class Coder:
 
         messages = self.format_messages()
 
-        timestamp = datetime.datetime.now().isoformat(timespec='seconds')
-        with open('.aider.llm.history', 'a') as log_file:
-            log_file.write(f"TO LLM {timestamp}\n")
-            log_file.write(format_messages(messages) + "\n")
+        self.io.log_llm_history("TO LLM", format_messages(messages))
 
         if self.verbose:
             utils.show_messages(messages, functions=self.functions)
@@ -808,6 +805,9 @@ class Coder:
                 exhausted = True
             else:
                 raise err
+        except Exception as err:
+            self.io.tool_error(f"Unexpected error: {err}")
+            return
 
         if exhausted:
             self.num_exhausted_context_windows += 1
@@ -831,10 +831,7 @@ class Coder:
 
         self.io.tool_output()
 
-        timestamp = datetime.datetime.now().isoformat(timespec='seconds')
-        with open('.aider.llm.history', 'a') as log_file:
-            log_file.write(f"LLM RESPONSE {timestamp}\n")
-            log_file.write(format_content("ASSISTANT", content) + "\n")
+        self.io.log_llm_history("LLM RESPONSE", format_content("ASSISTANT", content))
 
         if interrupted:
             content += "\n^C KeyboardInterrupt"

aider/io.py

@@ -106,6 +106,7 @@ class InputOutput:
         tool_error_color="red",
         encoding="utf-8",
         dry_run=False,
+        llm_history_file=None,
     ):
         no_color = os.environ.get("NO_COLOR")
         if no_color is not None and no_color != "":
@@ -125,6 +126,7 @@ class InputOutput:
         self.yes = yes
 
         self.input_history_file = input_history_file
+        self.llm_history_file = llm_history_file
         if chat_history_file is not None:
             self.chat_history_file = Path(chat_history_file)
         else:
@@ -206,10 +208,11 @@ class InputOutput:
         else:
             style = None
 
+        completer_instance = AutoCompleter(
+            root, rel_fnames, addable_rel_fnames, commands, self.encoding
+        )
+
         while True:
-            completer_instance = AutoCompleter(
-                root, rel_fnames, addable_rel_fnames, commands, self.encoding
-            )
             if multiline_input:
                 show = ". "
 
@@ -266,6 +269,14 @@ class InputOutput:
         fh = FileHistory(self.input_history_file)
         return fh.load_history_strings()
 
+    def log_llm_history(self, role, content):
+        if not self.llm_history_file:
+            return
+        timestamp = datetime.now().isoformat(timespec='seconds')
+        with open(self.llm_history_file, 'a', encoding=self.encoding) as log_file:
+            log_file.write(f"{role.upper()} {timestamp}\n")
+            log_file.write(content + "\n")
+
     def user_input(self, inp, log_only=True):
         if not log_only:
             style = dict(style=self.user_input_color) if self.user_input_color else dict()

aider/main.py

@@ -258,6 +258,7 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
         tool_error_color=args.tool_error_color,
         dry_run=args.dry_run,
         encoding=args.encoding,
+        llm_history_file=args.llm_history_file,
     )
 
     fnames = [str(Path(fn).resolve()) for fn in args.files]