README: updates and fixes

README.md

@@ -46,79 +46,80 @@ cmm [global options] command [command options]
 The `question` command is used to ask, create, and process questions.
 
 ```bash
-cmm question [-t OTAGS]... [-k ATAGS]... [-x XTAGS]... [-o OUTTAGS]... [-A AI] [-M MODEL] [-n NUM] [-m MAX] [-T TEMP] (-a ASK | -c CREATE | -r REPEAT | -p PROCESS) [-O] [-s SOURCE]... [-S SOURCE]...
+cmm question [-t OTAGS]... [-k ATAGS]... [-x XTAGS]... [-o OUTTAGS]... [-A AI_ID] [-M MODEL] [-n NUM] [-m MAX] [-T TEMP] (-a QUESTION | -c QUESTION | -r [MESSAGE ...] | -p [MESSAGE ...]) [-O] [-s FILE]... [-S FILE]...
 ```
 
-* `-t, --or-tags OTAGS` : List of tags (one must match)
-* `-k, --and-tags ATAGS` : List of tags (all must match)
-* `-x, --exclude-tags XTAGS` : List of tags to exclude
-* `-o, --output-tags OUTTAGS` : List of output tags (default: use input tags)
-* `-A, --AI AI` : AI ID to use
-* `-M, --model MODEL` : Model to use
-* `-n, --num-answers NUM` : Number of answers to request
-* `-m, --max-tokens MAX` : Max. number of tokens
-* `-T, --temperature TEMP` : Temperature value
-* `-a, --ask ASK` : Ask a question
-* `-c, --create CREATE` : Create a question
-* `-r, --repeat REPEAT` : Repeat a question
-* `-p, --process PROCESS` : Process existing questions
-* `-O, --overwrite` : Overwrite existing messages when repeating them
-* `-s, --source-text SOURCE` : Add content of a file to the query
-* `-S, --source-code SOURCE` : Add source code file content to the chat history
+* `-t, --or-tags OTAGS`: List of tags (one must match)
+* `-k, --and-tags ATAGS`: List of tags (all must match)
+* `-x, --exclude-tags XTAGS`: List of tags to exclude
+* `-o, --output-tags OUTTAGS`: List of output tags (default: use input tags)
+* `-A, --AI AI_ID`: AI ID to use
+* `-M, --model MODEL`: Model to use
+* `-n, --num-answers NUM`: Number of answers to request
+* `-m, --max-tokens MAX`: Max. number of tokens
+* `-T, --temperature TEMP`: Temperature value
+* `-a, --ask QUESTION`: Ask a question
+* `-c, --create QUESTION`: Create a question
+* `-r, --repeat [MESSAGE ...]`: Repeat a question
+* `-p, --process [MESSAGE ...]`: Process existing questions
+* `-O, --overwrite`: Overwrite existing messages when repeating them
+* `-s, --source-text FILE`: Add content of a file to the query
+* `-S, --source-code FILE`: Add source code file content to the chat history
 
 #### Hist
 
 The `hist` command is used to print the chat history.
 
 ```bash
-cmm hist [-t OTAGS]... [-k ATAGS]... [-x XTAGS]... [-w] [-W] [-S] [-A ANSWER] [-Q QUESTION]
+cmm hist [-t OTAGS]... [-k ATAGS]... [-x XTAGS]... [-w] [-W] [-S] [-A SUBSTRING] [-Q SUBSTRING]
 ```
 
-* `-t, --or-tags OTAGS` : List of tags (one must match)
-* `-k, --and-tags ATAGS` : List of tags (all must match)
-* `-x, --exclude-tags XTAGS` : List of tags to exclude
-* `-w, --with-tags` : Print chat history with tags
-* `-W, --with-files` : Print chat history with filenames
-* `-S, --source-code-only` : Print only source code
-* `-A, --answer ANSWER` : Search for answer substring
-* `-Q, --question QUESTION` : Search for question substring
+* `-t, --or-tags OTAGS`: List of tags (one must match)
+* `-k, --and-tags ATAGS`: List of tags (all must match)
+* `-x, --exclude-tags XTAGS`: List of tags to exclude
+* `-w, --with-tags`: Print chat history with tags
+* `-W, --with-files`: Print chat history with filenames
+* `-S, --source-code-only`: Only print embedded source code
+* `-A, --answer SUBSTRING`: Search for answer substring
+* `-Q, --question SUBSTRING`: Search for question substring
 
 #### Tags
 
 The `tags` command is used to manage tags.
 
 ```bash
-cmm tags (-l | -p PREFIX | -c CONTENT)
+cmm tags (-l | -p PREFIX | -c SUBSTRING)
 ```
 
-* `-l, --list` : List all tags and their frequency
-* `-p, --prefix PREFIX` : Filter tags by prefix
-* `-c, --contain CONTENT` : Filter tags by contained substring
+* `-l, --list`: List all tags and their frequency
+* `-p, --prefix PREFIX`: Filter tags by prefix
+* `-c, --contain SUBSTRING`: Filter tags by contained substring
 
 #### Config
 
 The `config` command is used to manage the configuration.
 
 ```bash
-cmm config (-l | -m | -c CREATE)
+cmm config (-l | -m | -c FILE)
 ```
 
-* `-l, --list-models` : List all available models
-* `-m, --print-model` : Print the currently configured model
-* `-c, --create CREATE` : Create config with default settings in the given file
+* `-l, --list-models`: List all available models
+* `-m, --print-model`: Print the currently configured model
+* `-c, --create FILE`: Create config with default settings in the given file
 
 #### Print
 
 The `print` command is used to print message files.
 
 ```bash
-cmm print -f FILE [-q | -a | -S]
+cmm print (-f FILE | -l) [-q | -a | -S]
 ```
 
-* `-f, --file FILE` : File to print
-* `-q, --question` : Print only question
-* `-a, --answer` : Print only answer
-* `-S, --only-source-code` : Print only source code
+* `-f, --file FILE`: Print given file
+* `-l, --latest`: Print latest message
+* `-q, --question`: Only print the question
+* `-a, --answer`: Only print the answer
+* `-S, --only-source-code`: Only print embedded source code
 
 ### Examples
 
@@ -160,18 +161,27 @@ cmm print -f example.yaml
 
 ## Configuration
 
-The configuration file (`.config.yaml`) should contain the following fields:
+The default configuration filename is `.config.yaml` (it is searched in the current working directory).
+Use the command `cmm config --create <FILENAME>` to create a default configuration:
 
-- `openai`:
-  - `api_key`: Your OpenAI API key.
-  - `model`: The name of the OpenAI model to use (e.g. "text-davinci-002").
-  - `temperature`: The temperature value for the model.
-  - `max_tokens`: The maximum number of tokens for the model.
-  - `top_p`: The top P value for the model.
-  - `frequency_penalty`: The frequency penalty value.
-  - `presence_penalty`: The presence penalty value.
-- `system`: The system message used to set the behavior of the AI.
-- `db`: The directory where the question-answer pairs are stored in YAML files.
+```
+cache: .
+db: ./db/
+ais:
+  myopenai:
+    name: openai
+    model: gpt-3.5-turbo-16k
+    api_key: 0123456789
+    temperature: 1.0
+    max_tokens: 4000
+    top_p: 1.0
+    frequency_penalty: 0.0
+    presence_penalty: 0.0
+    system: You are an assistant
+```
+
+Each AI has its own section and the name of that section is called the 'AI ID' (in the example above it is `myopenai`).
+The AI ID can be any string, as long as it's unique within the `ais` section. The AI ID is used for all commands that support the `AI` parameter and it's also stored within each message file.
 
 ## Autocompletion
 
@@ -186,33 +196,33 @@ After adding this line, restart your shell or run `source <your-shell-config-fil
 ## Contributing
 
 ### Enable commit hooks
-```
+```bash
 pip install pre-commit
 pre-commit install
 ```
 ### Execute tests before opening a PR
-```
+```bash
 pytest
 ```
 ### Consider using `pyenv` / `pyenv-virtualenv`
 Short installation instructions:
 * install `pyenv`:
-```
+```bash
 cd ~
 git clone https://github.com/pyenv/pyenv .pyenv
 cd ~/.pyenv && src/configure && make -C src
 ```
-* make sure that `~/.pyenv/shims` and `~/.pyenv/bin` are the first entries in your `PATH`, e. g. by setting it in `~/.bashrc`
+* make sure that `~/.pyenv/shims` and `~/.pyenv/bin` are the first entries in your `PATH`, e.g., by setting it in `~/.bashrc`
 * add the following to your `~/.bashrc` (after setting `PATH`): `eval "$(pyenv init -)"`
-* create a new terminal or source the changes (e. g. `source ~/.bashrc`)
+* create a new terminal or source the changes (e.g., `source ~/.bashrc`)
 * install `virtualenv`
-```
+```bash
 git clone https://github.com/pyenv/pyenv-virtualenv.git $(pyenv root)/plugins/pyenv-virtualenv
 ```
 * add the following to your `~/.bashrc` (after the commands above): `eval "$(pyenv virtualenv-init -)`
-* create a new terminal or source the changes (e. g. `source ~/.bashrc`)
-* go back to the `ChatMasterMind` repo and create a virtual environment with the latest `Python`, e. g. `3.11.4`:
-```
+* create a new terminal or source the changes (e.g., `source ~/.bashrc`)
+* go back to the `ChatMasterMind` repo and create a virtual environment with the latest `Python`, e.g., `3.11.4`:
+```bash
 cd <CMM_REPO_PATH>
 pyenv install 3.11.4
 pyenv virtualenv 3.11.4 py311
@@ -223,5 +233,3 @@ pyenv activate py311
 ## License
 
 This project is licensed under the terms of the WTFPL License.
-
-

chatmastermind/commands/hist.py

@@ -15,7 +15,7 @@ def hist_cmd(args: argparse.Namespace, config: Config) -> None:
                             tags_not=args.exclude_tags,
                             question_contains=args.question,
                             answer_contains=args.answer)
-    chat = ChatDB.from_dir(Path('.'),
+    chat = ChatDB.from_dir(Path(config.cache),
                            Path(config.db),
                            mfilter=mfilter)
     chat.print(args.source_code_only,

chatmastermind/commands/print.py

@@ -3,25 +3,43 @@ import argparse
 from pathlib import Path
 from ..configuration import Config
 from ..message import Message, MessageError
+from ..chat import ChatDB
+
+
+def print_message(message: Message, args: argparse.Namespace) -> None:
+    """
+    Print given message according to give arguments.
+    """
+    if args.question:
+        print(message.question)
+    elif args.answer:
+        print(message.answer)
+    elif message.answer and args.only_source_code:
+        for code in message.answer.source_code():
+            print(code)
+    else:
+        print(message.to_str())
 
 
 def print_cmd(args: argparse.Namespace, config: Config) -> None:
     """
     Handler for the 'print' command.
     """
-    fname = Path(args.file)
-    try:
-        message = Message.from_file(fname)
-        if message:
-            if args.question:
-                print(message.question)
-            elif args.answer:
-                print(message.answer)
-            elif message.answer and args.only_source_code:
-                for code in message.answer.source_code():
-                    print(code)
-            else:
-                print(message.to_str())
-    except MessageError:
-        print(f"File is not a valid message: {args.file}")
-        sys.exit(1)
+    # print given file
+    if args.file is not None:
+        fname = Path(args.file)
+        try:
+            message = Message.from_file(fname)
+            if message:
+                print_message(message, args)
+        except MessageError:
+            print(f"File is not a valid message: {args.file}")
+            sys.exit(1)
+    # print latest message
+    elif args.latest:
+        chat = ChatDB.from_dir(Path(config.cache), Path(config.db))
+        latest = chat.msg_latest(loc='disk')
+        if not latest:
+            print("No message found!")
+            sys.exit(1)
+        print_message(latest, args)

chatmastermind/commands/question.py

@@ -1,3 +1,4 @@
+import sys
 import argparse
 from pathlib import Path
 from itertools import zip_longest
@@ -51,7 +52,7 @@ def add_file_as_code(question_parts: list[str], file: str) -> None:
 
 def create_message(chat: ChatDB, args: argparse.Namespace) -> Message:
     """
-    Creates a new message from the given arguments and writes it
+    Create a new message from the given arguments and write it
     to the cache directory.
     """
     question_parts = []
@@ -70,13 +71,40 @@ def create_message(chat: ChatDB, args: argparse.Namespace) -> Message:
     full_question = '\n\n'.join(question_parts)
 
     message = Message(question=Question(full_question),
-                      tags=args.output_tags,  # FIXME
+                      tags=args.output_tags,
                       ai=args.AI,
                       model=args.model)
-    chat.cache_add([message])
+    # only write the new message to the cache,
+    # don't add it to the internal list
+    chat.cache_write([message])
     return message
 
 
+def make_request(ai: AI, chat: ChatDB, message: Message, args: argparse.Namespace) -> None:
+    """
+    Make an AI request with the given AI, chat history, message and arguments.
+    Write the response(s) to the cache directory, without appending it to the
+    given chat history. Then print the response(s).
+    """
+    # print history and message question before making the request
+    ai.print()
+    chat.print(paged=False)
+    print(message.to_str())
+    response: AIResponse = ai.request(message,
+                                      chat,
+                                      args.num_answers,
+                                      args.output_tags)
+    # only write the response messages to the cache,
+    # don't add them to the internal list
+    chat.cache_write(response.messages)
+    for idx, msg in enumerate(response.messages):
+        print(f"=== ANSWER {idx+1} ===")
+        print(msg.answer)
+    if response.tokens:
+        print("===============")
+        print(response.tokens)
+
+
 def question_cmd(args: argparse.Namespace, config: Config) -> None:
     """
     Handler for the 'question' command.
@@ -84,7 +112,7 @@ def question_cmd(args: argparse.Namespace, config: Config) -> None:
     mfilter = MessageFilter(tags_or=args.or_tags if args.or_tags is not None else set(),
                             tags_and=args.and_tags if args.and_tags is not None else set(),
                             tags_not=args.exclude_tags if args.exclude_tags is not None else set())
-    chat = ChatDB.from_dir(cache_path=Path('.'),
+    chat = ChatDB.from_dir(cache_path=Path(config.cache),
                            db_path=Path(config.db),
                            mfilter=mfilter)
     # if it's a new question, create and store it immediately
@@ -95,28 +123,29 @@ def question_cmd(args: argparse.Namespace, config: Config) -> None:
 
     # create the correct AI instance
     ai: AI = create_ai(args, config)
+
+    # === ASK ===
     if args.ask:
-        ai.print()
-        chat.print(paged=False)
-        response: AIResponse = ai.request(message,
-                                          chat,
-                                          args.num_answers,  # FIXME
-                                          args.output_tags)  # FIXME
-        chat.msg_update([response.messages[0]])
-        chat.cache_add(response.messages[1:])
-        for idx, msg in enumerate(response.messages):
-            print(f"=== ANSWER {idx+1} ===")
-            print(msg.answer)
-        if response.tokens:
-            print("===============")
-            print(response.tokens)
+        make_request(ai, chat, message, args)
+    # === REPEAT ===
     elif args.repeat is not None:
-        lmessage = chat.msg_latest()
-        assert lmessage
-        # TODO: repeat either the last question or the
-        # one(s) given in 'args.repeat' (overwrite
-        # existing ones if 'args.overwrite' is True)
-        pass
+        lmessage = chat.msg_latest(loc='cache')
+        if lmessage is None:
+            print("No message found to repeat!")
+            sys.exit(1)
+        else:
+            print(f"Repeating message '{lmessage.msg_id()}':")
+        # overwrite the latest message if requested or empty
+        if lmessage.answer is None or args.overwrite is True:
+            lmessage.clear_answer()
+            make_request(ai, chat, lmessage, args)
+        # otherwise create a new one
+        else:
+            args.ask = [lmessage.question]
+            message = create_message(chat, args)
+            make_request(ai, chat, message, args)
+
+    # === PROCESS ===
     elif args.process is not None:
         # TODO: process either all questions without an
         # answer or the one(s) given in 'args.process'

chatmastermind/commands/tags.py

@@ -8,7 +8,7 @@ def tags_cmd(args: argparse.Namespace, config: Config) -> None:
     """
     Handler for the 'tags' command.
     """
-    chat = ChatDB.from_dir(cache_path=Path('.'),
+    chat = ChatDB.from_dir(cache_path=Path(config.cache),
                            db_path=Path(config.db))
     if args.list:
         tags_freq = chat.msg_tags_frequency(args.prefix, args.contain)

chatmastermind/configuration.py

@@ -116,6 +116,7 @@ class Config:
     """
     # all members have default values, so we can easily create
     # a default configuration
+    cache: str = '.'
     db: str = './db/'
     ais: dict[str, AIConfig] = field(default_factory=create_default_ai_configs)
 
@@ -132,6 +133,7 @@ class Config:
             ai_conf = ai_config_instance(conf['name'], conf)
             ais[ID] = ai_conf
         return cls(
+            cache=str(source['cache']) if 'cache' in source else '.',
             db=str(source['db']),
             ais=ais
         )

chatmastermind/main.py

@@ -44,13 +44,13 @@ def create_parser() -> argparse.ArgumentParser:
                                        help='List of tags to exclude', metavar='XTAGS')
     etag_arg.completer = tags_completer  # type: ignore
     otag_arg = tag_parser.add_argument('-o', '--output-tags', nargs='+',
-                                       help='List of output tags (default: use input tags)', metavar='OUTTAGS')
+                                       help='List of output tags (default: use input tags)', metavar='OUTAGS')
     otag_arg.completer = tags_completer  # type: ignore
 
     # a parent parser for all commands that support AI configuration
     ai_parser = argparse.ArgumentParser(add_help=False)
-    ai_parser.add_argument('-A', '--AI', help='AI ID to use')
-    ai_parser.add_argument('-M', '--model', help='Model to use')
+    ai_parser.add_argument('-A', '--AI', help='AI ID to use', metavar='AI_ID')
+    ai_parser.add_argument('-M', '--model', help='Model to use', metavar='MODEL')
     ai_parser.add_argument('-n', '--num-answers', help='Number of answers to request', type=int, default=1)
     ai_parser.add_argument('-m', '--max-tokens', help='Max. nr. of tokens', type=int)
     ai_parser.add_argument('-T', '--temperature', help='Temperature value', type=float)
@@ -61,14 +61,15 @@ def create_parser() -> argparse.ArgumentParser:
                                                aliases=['q'])
     question_cmd_parser.set_defaults(func=question_cmd)
     question_group = question_cmd_parser.add_mutually_exclusive_group(required=True)
-    question_group.add_argument('-a', '--ask', nargs='+', help='Ask a question')
-    question_group.add_argument('-c', '--create', nargs='+', help='Create a question')
-    question_group.add_argument('-r', '--repeat', nargs='*', help='Repeat a question')
-    question_group.add_argument('-p', '--process', nargs='*', help='Process existing questions')
+    question_group.add_argument('-a', '--ask', nargs='+', help='Ask a question', metavar='QUESTION')
+    question_group.add_argument('-c', '--create', nargs='+', help='Create a question', metavar='QUESTION')
+    question_group.add_argument('-r', '--repeat', nargs='*', help='Repeat a question', metavar='MESSAGE')
+    question_group.add_argument('-p', '--process', nargs='*', help='Process existing questions', metavar='MESSAGE')
     question_cmd_parser.add_argument('-O', '--overwrite', help='Overwrite existing messages when repeating them',
                                      action='store_true')
-    question_cmd_parser.add_argument('-s', '--source-text', nargs='+', help='Add content of a file to the query')
-    question_cmd_parser.add_argument('-S', '--source-code', nargs='+', help='Add source code file content to the chat history')
+    question_cmd_parser.add_argument('-s', '--source-text', nargs='+', help='Add content of a file to the query', metavar='FILE')
+    question_cmd_parser.add_argument('-S', '--source-code', nargs='+', help='Add source code file content to the chat history',
+                                     metavar='FILE')
 
     # 'hist' command parser
     hist_cmd_parser = cmdparser.add_parser('hist', parents=[tag_parser],
@@ -79,10 +80,10 @@ def create_parser() -> argparse.ArgumentParser:
                                  action='store_true')
     hist_cmd_parser.add_argument('-W', '--with-files', help="Print chat history with filenames.",
                                  action='store_true')
-    hist_cmd_parser.add_argument('-S', '--source-code-only', help='Print only source code',
+    hist_cmd_parser.add_argument('-S', '--source-code-only', help='Only print embedded source code',
                                  action='store_true')
-    hist_cmd_parser.add_argument('-A', '--answer', help='Search for answer substring')
-    hist_cmd_parser.add_argument('-Q', '--question', help='Search for question substring')
+    hist_cmd_parser.add_argument('-A', '--answer', help='Search for answer substring', metavar='SUBSTRING')
+    hist_cmd_parser.add_argument('-Q', '--question', help='Search for question substring', metavar='SUBSTRING')
 
     # 'tags' command parser
     tags_cmd_parser = cmdparser.add_parser('tags',
@@ -92,8 +93,8 @@ def create_parser() -> argparse.ArgumentParser:
     tags_group = tags_cmd_parser.add_mutually_exclusive_group(required=True)
     tags_group.add_argument('-l', '--list', help="List all tags and their frequency",
                             action='store_true')
-    tags_cmd_parser.add_argument('-p', '--prefix', help="Filter tags by prefix")
-    tags_cmd_parser.add_argument('-c', '--contain', help="Filter tags by contained substring")
+    tags_cmd_parser.add_argument('-p', '--prefix', help="Filter tags by prefix", metavar='PREFIX')
+    tags_cmd_parser.add_argument('-c', '--contain', help="Filter tags by contained substring", metavar='SUBSTRING')
 
     # 'config' command parser
     config_cmd_parser = cmdparser.add_parser('config',
@@ -106,18 +107,20 @@ def create_parser() -> argparse.ArgumentParser:
                               action='store_true')
     config_group.add_argument('-m', '--print-model', help="Print the currently configured model",
                               action='store_true')
-    config_group.add_argument('-c', '--create', help="Create config with default settings in the given file")
+    config_group.add_argument('-c', '--create', help="Create config with default settings in the given file", metavar='FILE')
 
     # 'print' command parser
     print_cmd_parser = cmdparser.add_parser('print',
                                             help="Print message files.",
                                             aliases=['p'])
     print_cmd_parser.set_defaults(func=print_cmd)
-    print_cmd_parser.add_argument('-f', '--file', help='File to print', required=True)
+    print_group = print_cmd_parser.add_mutually_exclusive_group(required=True)
+    print_group.add_argument('-f', '--file', help='Print given message file', metavar='FILE')
+    print_group.add_argument('-l', '--latest', help='Print latest message', action='store_true')
     print_cmd_modes = print_cmd_parser.add_mutually_exclusive_group()
-    print_cmd_modes.add_argument('-q', '--question', help='Print only question', action='store_true')
-    print_cmd_modes.add_argument('-a', '--answer', help='Print only answer', action='store_true')
-    print_cmd_modes.add_argument('-S', '--only-source-code', help='Print only source code', action='store_true')
+    print_cmd_modes.add_argument('-q', '--question', help='Only print the question', action='store_true')
+    print_cmd_modes.add_argument('-a', '--answer', help='Only print the answer', action='store_true')
+    print_cmd_modes.add_argument('-S', '--only-source-code', help='Only print embedded source code', action='store_true')
 
     argcomplete.autocomplete(parser)
     return parser

chatmastermind/message.py

@@ -222,12 +222,36 @@ class Message():
     ai_yaml_key: ClassVar[str] = 'ai'
     model_yaml_key: ClassVar[str] = 'model'
 
+    def __post_init__(self) -> None:
+        # convert some types that are often set wrong
+        if self.tags is not None and not isinstance(self.tags, set):
+            self.tags = set(self.tags)
+        if self.file_path is not None and not isinstance(self.file_path, pathlib.Path):
+            self.file_path = pathlib.Path(self.file_path)
+
     def __hash__(self) -> int:
         """
         The hash value is computed based on immutable members.
         """
         return hash((self.question, self.answer))
 
+    def equals(self, other: MessageInst, tags: bool = True, ai: bool = True,
+               model: bool = True, file_path: bool = True, verbose: bool = False) -> bool:
+        """
+        Compare this message with another one, including the metadata.
+        Return True if everything is identical, False otherwise.
+        """
+        equal: bool = ((not tags or (self.tags == other.tags))
+                       and (not ai or (self.ai == other.ai))  # noqa: W503
+                       and (not model or (self.model == other.model))  # noqa: W503
+                       and (not file_path or (self.file_path == other.file_path))  # noqa: W503
+                       and (self == other))  # noqa: W503
+        if not equal and verbose:
+            print("Messages not equal:")
+            print(self)
+            print(other)
+        return equal
+
     @classmethod
     def from_dict(cls: Type[MessageInst], data: dict[str, Any]) -> MessageInst:
         """
@@ -418,9 +442,6 @@ class Message():
             output.append(self.answer)
         return '\n'.join(output)
 
-    def __str__(self) -> str:
-        return self.to_str(True, True, False)
-
     def to_file(self, file_path: Optional[pathlib.Path]=None) -> None:  # noqa: 11
         """
         Write a Message to the given file. Type is determined based on the suffix.
@@ -540,6 +561,9 @@ class Message():
         if self.tags:
             self.tags = rename_tags(self.tags, tags_rename)
 
+    def clear_answer(self) -> None:
+        self.answer = None
+
     def msg_id(self) -> str:
         """
         Returns an ID that is unique throughout all messages in the same (DB) directory.

tests/test_chat.py

@@ -10,7 +10,18 @@ from chatmastermind.message import Message, Question, Answer, Tag, MessageFilter
 from chatmastermind.chat import Chat, ChatDB, ChatError
 
 
-class TestChat(unittest.TestCase):
+class TestChatBase(unittest.TestCase):
+    def assert_messages_equal(self, msg1: list[Message], msg2: list[Message]) -> None:
+        """
+        Compare messages using more than just Question and Answer.
+        """
+        self.assertEqual(len(msg1), len(msg2))
+        for m1, m2 in zip(msg1, msg2):
+            # exclude the file_path, compare only Q, A and metadata
+            self.assertTrue(m1.equals(m2, file_path=False, verbose=True))
+
+
+class TestChat(TestChatBase):
     def setUp(self) -> None:
         self.chat = Chat([])
         self.message1 = Message(Question('Question 1'),
@@ -26,24 +37,24 @@ class TestChat(unittest.TestCase):
     def test_unique_id(self) -> None:
         # test with two identical messages
         self.chat.msg_add([self.message1, self.message1])
-        self.assertSequenceEqual(self.chat.messages, [self.message1, self.message1])
+        self.assert_messages_equal(self.chat.messages, [self.message1, self.message1])
         self.chat.msg_unique_id()
-        self.assertSequenceEqual(self.chat.messages, [self.message1])
+        self.assert_messages_equal(self.chat.messages, [self.message1])
         # test with two different messages
         self.chat.msg_add([self.message2])
         self.chat.msg_unique_id()
-        self.assertSequenceEqual(self.chat.messages, [self.message1, self.message2])
+        self.assert_messages_equal(self.chat.messages, [self.message1, self.message2])
 
     def test_unique_content(self) -> None:
         # test with two identical messages
         self.chat.msg_add([self.message1, self.message1])
-        self.assertSequenceEqual(self.chat.messages, [self.message1, self.message1])
+        self.assert_messages_equal(self.chat.messages, [self.message1, self.message1])
         self.chat.msg_unique_content()
-        self.assertSequenceEqual(self.chat.messages, [self.message1])
+        self.assert_messages_equal(self.chat.messages, [self.message1])
         # test with two different messages
         self.chat.msg_add([self.message2])
         self.chat.msg_unique_content()
-        self.assertSequenceEqual(self.chat.messages, [self.message1, self.message2])
+        self.assert_messages_equal(self.chat.messages, [self.message1, self.message2])
 
     def test_filter(self) -> None:
         self.chat.msg_add([self.message1, self.message2])
@@ -150,7 +161,7 @@ Answer 2
         self.assertEqual(mock_stdout.getvalue(), expected_output)
 
 
-class TestChatDB(unittest.TestCase):
+class TestChatDB(TestChatBase):
     def setUp(self) -> None:
         self.db_path = tempfile.TemporaryDirectory()
         self.cache_path = tempfile.TemporaryDirectory()
@@ -569,7 +580,7 @@ class TestChatDB(unittest.TestCase):
         search_names = ['0001', '0002.yaml', self.message3.msg_id(), str(self.message3.file_path)]
         expected_result = [self.message1, self.message2, self.message3]
         result = chat_db.msg_find(search_names, loc='all')
-        self.assertSequenceEqual(result, expected_result)
+        self.assert_messages_equal(result, expected_result)
 
     def test_msg_latest(self) -> None:
         chat_db = ChatDB.from_dir(pathlib.Path(self.cache_path.name),
@@ -595,47 +606,47 @@ class TestChatDB(unittest.TestCase):
         chat_db = ChatDB.from_dir(pathlib.Path(self.cache_path.name),
                                   pathlib.Path(self.db_path.name))
         all_messages = [self.message1, self.message2, self.message3, self.message4]
-        self.assertSequenceEqual(chat_db.msg_gather(loc='all'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='db'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='mem'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='disk'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache'), [])
+        self.assert_messages_equal(chat_db.msg_gather(loc='all'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='db'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='mem'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='disk'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache'), [])
         # add a new message, but only to the internal list
         new_message = Message(Question("What?"))
         all_messages_mem = all_messages + [new_message]
         chat_db.msg_add([new_message])
-        self.assertSequenceEqual(chat_db.msg_gather(loc='mem'), all_messages_mem)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='all'), all_messages_mem)
+        self.assert_messages_equal(chat_db.msg_gather(loc='mem'), all_messages_mem)
+        self.assert_messages_equal(chat_db.msg_gather(loc='all'), all_messages_mem)
         # the nr. of messages on disk did not change -> expect old result
-        self.assertSequenceEqual(chat_db.msg_gather(loc='db'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='disk'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache'), [])
+        self.assert_messages_equal(chat_db.msg_gather(loc='db'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='disk'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache'), [])
         # test with MessageFilter
-        self.assertSequenceEqual(chat_db.msg_gather(loc='all', mfilter=MessageFilter(tags_or={Tag('tag1')})),
-                                 [self.message1])
-        self.assertSequenceEqual(chat_db.msg_gather(loc='disk', mfilter=MessageFilter(tags_or={Tag('tag2')})),
-                                 [self.message2])
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache', mfilter=MessageFilter(tags_or={Tag('tag3')})),
-                                 [])
-        self.assertSequenceEqual(chat_db.msg_gather(loc='mem', mfilter=MessageFilter(question_contains="What")),
-                                 [new_message])
+        self.assert_messages_equal(chat_db.msg_gather(loc='all', mfilter=MessageFilter(tags_or={Tag('tag1')})),
+                                   [self.message1])
+        self.assert_messages_equal(chat_db.msg_gather(loc='disk', mfilter=MessageFilter(tags_or={Tag('tag2')})),
+                                   [self.message2])
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache', mfilter=MessageFilter(tags_or={Tag('tag3')})),
+                                   [])
+        self.assert_messages_equal(chat_db.msg_gather(loc='mem', mfilter=MessageFilter(question_contains="What")),
+                                   [new_message])
 
     def test_msg_move_and_gather(self) -> None:
         chat_db = ChatDB.from_dir(pathlib.Path(self.cache_path.name),
                                   pathlib.Path(self.db_path.name))
         all_messages = [self.message1, self.message2, self.message3, self.message4]
-        self.assertSequenceEqual(chat_db.msg_gather(loc='db'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache'), [])
+        self.assert_messages_equal(chat_db.msg_gather(loc='db'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache'), [])
         # move first message to the cache
         chat_db.cache_move(self.message1)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache'), [self.message1])
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache'), [self.message1])
         self.assertEqual(self.message1.file_path.parent, pathlib.Path(self.cache_path.name))  # type: ignore [union-attr]
-        self.assertSequenceEqual(chat_db.msg_gather(loc='db'), [self.message2, self.message3, self.message4])
-        self.assertSequenceEqual(chat_db.msg_gather(loc='all'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='disk'), all_messages)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='mem'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='db'), [self.message2, self.message3, self.message4])
+        self.assert_messages_equal(chat_db.msg_gather(loc='all'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='disk'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='mem'), all_messages)
         # now move first message back to the DB
         chat_db.db_move(self.message1)
-        self.assertSequenceEqual(chat_db.msg_gather(loc='cache'), [])
+        self.assert_messages_equal(chat_db.msg_gather(loc='cache'), [])
         self.assertEqual(self.message1.file_path.parent, pathlib.Path(self.db_path.name))  # type: ignore [union-attr]
-        self.assertSequenceEqual(chat_db.msg_gather(loc='db'), all_messages)
+        self.assert_messages_equal(chat_db.msg_gather(loc='db'), all_messages)

tests/test_configuration.py

@@ -57,6 +57,7 @@ class TestConfig(unittest.TestCase):
 
     def test_from_dict_should_create_config_from_dict(self) -> None:
         source_dict = {
+            'cache': '.',
             'db': './test_db/',
             'ais': {
                 'myopenai': {
@@ -73,6 +74,7 @@ class TestConfig(unittest.TestCase):
             }
         }
         config = Config.from_dict(source_dict)
+        self.assertEqual(config.cache, '.')
         self.assertEqual(config.db, './test_db/')
         self.assertEqual(len(config.ais), 1)
         self.assertEqual(config.ais['myopenai'].name, 'openai')
@@ -89,6 +91,7 @@ class TestConfig(unittest.TestCase):
 
     def test_from_file_should_load_config_from_file(self) -> None:
         source_dict = {
+            'cache': './test_cache/',
             'db': './test_db/',
             'ais': {
                 'default': {
@@ -108,6 +111,7 @@ class TestConfig(unittest.TestCase):
             yaml.dump(source_dict, f)
         config = Config.from_file(self.test_file.name)
         self.assertIsInstance(config, Config)
+        self.assertEqual(config.cache, './test_cache/')
         self.assertEqual(config.db, './test_db/')
         self.assertEqual(len(config.ais), 1)
         self.assertIsInstance(config.ais['default'], AIConfig)
@@ -115,6 +119,7 @@ class TestConfig(unittest.TestCase):
 
     def test_to_file_should_save_config_to_file(self) -> None:
         config = Config(
+            cache='./test_cache/',
             db='./test_db/',
             ais={
                 'myopenai': OpenAIConfig(
@@ -133,12 +138,14 @@ class TestConfig(unittest.TestCase):
         config.to_file(Path(self.test_file.name))
         with open(self.test_file.name, 'r') as f:
             saved_config = yaml.load(f, Loader=yaml.FullLoader)
+        self.assertEqual(saved_config['cache'], './test_cache/')
         self.assertEqual(saved_config['db'], './test_db/')
         self.assertEqual(len(saved_config['ais']), 1)
         self.assertEqual(saved_config['ais']['myopenai']['system'], 'Custom system')
 
     def test_from_file_error_unknown_ai(self) -> None:
         source_dict = {
+            'cache': './test_cache/',
             'db': './test_db/',
             'ais': {
                 'default': {

tests/test_question_cmd.py

@@ -3,23 +3,39 @@ import unittest
 import argparse
 import tempfile
 from pathlib import Path
-from unittest.mock import MagicMock
-from chatmastermind.commands.question import create_message
+from unittest import mock
+from unittest.mock import MagicMock, call, ANY
+from typing import Optional
+from chatmastermind.configuration import Config
+from chatmastermind.commands.question import create_message, question_cmd
+from chatmastermind.tags import Tag
 from chatmastermind.message import Message, Question, Answer
-from chatmastermind.chat import ChatDB
+from chatmastermind.chat import Chat, ChatDB
+from chatmastermind.ai import AI, AIResponse, Tokens, AIError
 
 
-class TestMessageCreate(unittest.TestCase):
+class TestQuestionCmdBase(unittest.TestCase):
+    def assert_messages_equal(self, msg1: list[Message], msg2: list[Message]) -> None:
+        """
+        Compare messages using more than just Question and Answer.
+        """
+        self.assertEqual(len(msg1), len(msg2))
+        for m1, m2 in zip(msg1, msg2):
+            # exclude the file_path, compare only Q, A and metadata
+            self.assertTrue(m1.equals(m2, file_path=False, verbose=True))
+
+
+class TestMessageCreate(TestQuestionCmdBase):
     """
     Test if messages created by the 'question' command have
     the correct format.
     """
     def setUp(self) -> None:
         # create ChatDB structure
-        self.db_path = tempfile.TemporaryDirectory()
-        self.cache_path = tempfile.TemporaryDirectory()
-        self.chat = ChatDB.from_dir(cache_path=Path(self.cache_path.name),
-                                    db_path=Path(self.db_path.name))
+        self.db_dir = tempfile.TemporaryDirectory()
+        self.cache_dir = tempfile.TemporaryDirectory()
+        self.chat = ChatDB.from_dir(cache_path=Path(self.cache_dir.name),
+                                    db_path=Path(self.db_dir.name))
         # create some messages
         self.message_text = Message(Question("What is this?"),
                                     Answer("It is pure text"))
@@ -74,6 +90,7 @@ Aaaand again some text."""
         os.remove(self.source_file1.name)
         os.remove(self.source_file2.name)
         os.remove(self.source_file3.name)
+        os.remove(self.source_file4.name)
 
     def message_list(self, tmp_dir: tempfile.TemporaryDirectory) -> list[Path]:
         # exclude '.next'
@@ -81,10 +98,10 @@ Aaaand again some text."""
 
     def test_message_file_created(self) -> None:
         self.args.ask = ["What is this?"]
-        cache_dir_files = self.message_list(self.cache_path)
+        cache_dir_files = self.message_list(self.cache_dir)
         self.assertEqual(len(cache_dir_files), 0)
         create_message(self.chat, self.args)
-        cache_dir_files = self.message_list(self.cache_path)
+        cache_dir_files = self.message_list(self.cache_dir)
         self.assertEqual(len(cache_dir_files), 1)
         message = Message.from_file(cache_dir_files[0])
         self.assertIsInstance(message, Message)
@@ -193,3 +210,304 @@ This is embedded source code.
 It is embedded code
 ```
 """))
+
+
+class TestQuestionCmd(TestQuestionCmdBase):
+
+    def setUp(self) -> None:
+        # create DB and cache
+        self.db_dir = tempfile.TemporaryDirectory()
+        self.cache_dir = tempfile.TemporaryDirectory()
+        # create configuration
+        self.config = Config()
+        self.config.cache = self.cache_dir.name
+        self.config.db = self.db_dir.name
+        # create a mock argparse.Namespace
+        self.args = argparse.Namespace(
+            ask=['What is the meaning of life?'],
+            num_answers=1,
+            output_tags=['science'],
+            AI='openai',
+            model='gpt-3.5-turbo',
+            or_tags=None,
+            and_tags=None,
+            exclude_tags=None,
+            source_text=None,
+            source_code=None,
+            create=None,
+            repeat=None,
+            process=None,
+            overwrite=None
+        )
+        # create a mock AI instance
+        self.ai = MagicMock(spec=AI)
+        self.ai.request.side_effect = self.mock_request
+
+    def input_message(self, args: argparse.Namespace) -> Message:
+        """
+        Create the expected input message for a question using the
+        given arguments.
+        """
+        # NOTE: we only use the first question from the "ask" list
+        # -> message creation using "question.create_message()" is
+        #    tested above
+        # the answer is always empty for the input message
+        return Message(Question(args.ask[0]),
+                       tags=args.output_tags,
+                       ai=args.AI,
+                       model=args.model)
+
+    def mock_request(self,
+                     question: Message,
+                     chat: Chat,
+                     num_answers: int = 1,
+                     otags: Optional[set[Tag]] = None) -> AIResponse:
+        """
+        Mock the 'ai.request()' function
+        """
+        question.answer = Answer("Answer 0")
+        question.tags = set(otags) if otags else None
+        question.ai = 'FakeAI'
+        question.model = 'FakeModel'
+        answers: list[Message] = [question]
+        for n in range(1, num_answers):
+            answers.append(Message(question=question.question,
+                                   answer=Answer(f"Answer {n}"),
+                                   tags=otags,
+                                   ai='FakeAI',
+                                   model='FakeModel'))
+        return AIResponse(answers, Tokens(10, 10, 20))
+
+    def message_list(self, tmp_dir: tempfile.TemporaryDirectory) -> list[Path]:
+        # exclude '.next'
+        return sorted([f for f in Path(tmp_dir.name).glob('*.[ty]*')])
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_ask_single_answer(self, mock_create_ai: MagicMock) -> None:
+        """
+        Test single answer with no errors.
+        """
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+
+        # execute the command
+        question_cmd(self.args, self.config)
+
+        # check for correct request call
+        self.ai.request.assert_called_once_with(expected_question,
+                                                ANY,
+                                                self.args.num_answers,
+                                                self.args.output_tags)
+        # check for the expected message files
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+
+    @mock.patch('chatmastermind.commands.question.ChatDB.from_dir')
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_ask_single_answer_mocked(self, mock_create_ai: MagicMock, mock_from_dir: MagicMock) -> None:
+        """
+        Test single answer with no errors (mocked ChatDB version).
+        """
+        chat = MagicMock(spec=ChatDB)
+        mock_from_dir.return_value = chat
+
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+
+        # execute the command
+        question_cmd(self.args, self.config)
+
+        # check for correct request call
+        self.ai.request.assert_called_once_with(expected_question,
+                                                chat,
+                                                self.args.num_answers,
+                                                self.args.output_tags)
+
+        # check for the correct ChatDB calls:
+        # - initial question has been written (prior to the actual request)
+        # - responses have been written (after the request)
+        chat.cache_write.assert_has_calls([call([expected_question]),
+                                           call(expected_responses)],
+                                          any_order=False)
+
+        # check that the messages have not been added to the internal message list
+        chat.cache_add.assert_not_called()
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_ask_with_error(self, mock_create_ai: MagicMock) -> None:
+        """
+        Provoke an error during the AI request and verify that the question
+        has been correctly stored in the cache.
+        """
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        self.ai.request.side_effect = AIError
+
+        # execute the command
+        with self.assertRaises(AIError):
+            question_cmd(self.args, self.config)
+
+        # check for correct request call
+        self.ai.request.assert_called_once_with(expected_question,
+                                                ANY,
+                                                self.args.num_answers,
+                                                self.args.output_tags)
+        # check for the expected message files
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, [expected_question])
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_repeat_single_question(self, mock_create_ai: MagicMock) -> None:
+        """
+        Repeat a single question.
+        """
+        # 1. ask a question
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+        question_cmd(self.args, self.config)
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+
+        # 2. repeat the last question (without overwriting)
+        # -> expect two identical messages (except for the file_path)
+        self.args.ask = None
+        self.args.repeat = []
+        self.args.overwrite = False
+        expected_responses += expected_responses
+        question_cmd(self.args, self.config)
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 2)
+        self.assert_messages_equal(cached_msg, expected_responses)
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_repeat_single_question_overwrite(self, mock_create_ai: MagicMock) -> None:
+        """
+        Repeat a single question and overwrite the old one.
+        """
+        # 1. ask a question
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+        question_cmd(self.args, self.config)
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        assert cached_msg[0].file_path
+        cached_msg_file_id = cached_msg[0].file_path.stem
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+
+        # 2. repeat the last question (WITH overwriting)
+        # -> expect a single message afterwards
+        self.args.ask = None
+        self.args.repeat = []
+        self.args.overwrite = True
+        question_cmd(self.args, self.config)
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+        # also check that the file ID has not been changed
+        assert cached_msg[0].file_path
+        self.assertEqual(cached_msg_file_id, cached_msg[0].file_path.stem)
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_repeat_single_question_after_error(self, mock_create_ai: MagicMock) -> None:
+        """
+        Repeat a single question after an error.
+        """
+        # 1. ask a question and provoke an error
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        self.ai.request.side_effect = AIError
+        with self.assertRaises(AIError):
+            question_cmd(self.args, self.config)
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        assert cached_msg[0].file_path
+        cached_msg_file_id = cached_msg[0].file_path.stem
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, [expected_question])
+
+        # 2. repeat the last question (without overwriting)
+        # -> expect a single message because if the original has
+        #    no answer, it should be overwritten by default
+        self.args.ask = None
+        self.args.repeat = []
+        self.args.overwrite = False
+        self.ai.request.side_effect = self.mock_request
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+        question_cmd(self.args, self.config)
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+        # also check that the file ID has not been changed
+        assert cached_msg[0].file_path
+        self.assertEqual(cached_msg_file_id, cached_msg[0].file_path.stem)
+
+    @mock.patch('chatmastermind.commands.question.create_ai')
+    def test_repeat_single_question_new_args(self, mock_create_ai: MagicMock) -> None:
+        """
+        Repeat a single question with new arguments.
+        """
+        # 1. ask a question
+        mock_create_ai.return_value = self.ai
+        expected_question = self.input_message(self.args)
+        expected_responses = self.mock_request(expected_question,
+                                               Chat([]),
+                                               self.args.num_answers,
+                                               self.args.output_tags).messages
+        question_cmd(self.args, self.config)
+        chat = ChatDB.from_dir(Path(self.cache_dir.name),
+                               Path(self.db_dir.name))
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 1)
+        self.assert_messages_equal(cached_msg, expected_responses)
+
+        # 2. repeat the last question with new arguments (without overwriting)
+        # -> expect two messages with identical question and answer, but different metadata
+        self.args.ask = None
+        self.args.repeat = []
+        self.args.overwrite = False
+        self.args.output_tags = ['newtag']
+        self.args.AI = 'newai'
+        self.args.model = 'newmodel'
+        new_expected_question = Message(question=Question(expected_question.question),
+                                        tags=set(self.args.output_tags),
+                                        ai=self.args.AI,
+                                        model=self.args.model)
+        expected_responses += self.mock_request(new_expected_question,
+                                                Chat([]),
+                                                self.args.num_answers,
+                                                set(self.args.output_tags)).messages
+        question_cmd(self.args, self.config)
+        cached_msg = chat.msg_gather(loc='cache')
+        self.assertEqual(len(self.message_list(self.cache_dir)), 2)
+        self.assert_messages_equal(cached_msg, expected_responses)