docs: Update README.md to reflect latest features

README.md

@@ -26,18 +26,29 @@ This will create an executable named `nvidia-ai-chat` (or `nvidia-ai-chat.exe` o
 ### Authentication
 
 The tool requires an NVIDIA AI access token. You can provide it in one of two ways:
-1. Set the `NVIDIA_BUILD_AI_ACCESS_TOKEN` environment variable:
-   ```bash
-   export NVIDIA_BUILD_AI_ACCESS_TOKEN="your_token_here"
-   ```
-2. Use the `-k` or `--access-token` flag:
-   ```bash
-   ./nvidia-ai-chat -k "your_token_here"
-   ```
+
+1.  **Environment Variable**: The tool checks for the following environment variables in order: `NVIDIA_BUILD_AI_ACCESS_TOKEN`, `NVIDIA_ACCESS_TOKEN`, `ACCESS_TOKEN`, `NVIDIA_API_KEY`, `API_KEY`.
+    ```bash
+    export NVIDIA_BUILD_AI_ACCESS_TOKEN="your_token_here"
+    ```
+2.  **Command-Line Flag**: Use the `-k` or `--access-token` flag to provide the token directly. This overrides any environment variables.
+    ```bash
+    ./nvidia-ai-chat -k "your_token_here"
+    ```
+
+### Conversation Management
+
+By default, `nvidia-ai-chat` stores your conversations in `~/.cache/nvidia-chat/`.
+
+-   **Starting a New Chat**: If you run the tool without specifying a file, it creates a new timestamped conversation file (e.g., `conversation-20231027-123456.json`) and prints its path.
+-   **Resuming a Chat**: To continue a previous conversation, pass the path to the conversation file as an argument:
+    ```bash
+    ./nvidia-ai-chat /path/to/your/conversation.json
+    ```
 
 ### Interactive Mode
 
-To start an interactive chat session, simply run the application:
+To start an interactive chat session, run the application, optionally specifying a conversation file:
 
 ```bash
 ./nvidia-ai-chat
@@ -50,40 +61,83 @@ This will create a new conversation file in `~/.cache/nvidia-chat/`. You can als
 ```
 
 In interactive mode, you can use the following commands:
+- `/help`: Show the help message.
 - `/exit`, `/quit`: Exit the program.
 - `/history`: Print the full conversation JSON.
 - `/clear`: Clear the conversation messages.
 - `/save <file>`: Save the conversation to a new file.
+- `/list`: List supported models.
+- `/model <model_name>`: Switch model for the session.
+- `/modelinfo [name]`: List settings for a model (defaults to current).
+- `/askfor_model_setting`: Interactively set model parameters.
+- `/persist-settings`: Save the current session's settings to the conversation file.
 - `/persist-system <file>`: Persist a system prompt from a file.
-- `/model <model_name>`: Switch the model for the current session.
-- `/temperature <0..1>`: Set the temperature for the current session.
-- `/exportlast [-t] <file>`: Export the last AI response to a file.
-- `/exportlastn [-t] <n> <file>`: Export the last `n` AI responses to a file.
-- `/exportn [-t] <n> <file>`: Export the Nth-to-last AI response to a file.
-The optional `-t` flag filters out the AI's "thinking" block from the exported content.
-- `/help`: Show the help message.
+- `/exportlast [-t] <file>`: Export last AI response to a markdown file (-t filters thinking).
+- `/exportlastn [-t] <n> <file>`: Export last n AI responses.
+- `/exportn [-t] <n> <file>`: Export the Nth-to-last AI response.
+- `/randomodel`: Switch to a random supported model.
 
-### Non-Interactive Mode
+For any model setting, you can use `/<setting_name> <value>` or `/<setting_name> unset`.
+For example: `/temperature 0.8`, `/stop unset`
 
-To get a response for a single prompt, use the `--prompt` flag:
+### Non-Interactive Mode
 
+To get a response for a single prompt without entering an interactive session, use the `--prompt` flag. The tool will print the AI's response to standard output and exit.
+
+The `--prompt` flag can accept:
+- A string of text directly:
+  ```bash
+  ./nvidia-ai-chat --prompt="Translate 'hello' to French"
+  ```
+- A path to a file containing the prompt:
+  ```bash
+  ./nvidia-ai-chat --prompt=./my_prompt.txt
+  ```
+- A hyphen (`-`) to read the prompt from standard input (stdin):
+  ```bash
+  echo "Summarize this article" | ./nvidia-ai-chat --prompt=-
+  ```
+
+You can combine this with other flags, such as specifying a model:
 ```bash
-./nvidia-ai-chat --prompt="Hello, world!"
+./nvidia-ai-chat --model="google/codegemma-7b" --prompt="Write a python function to check for prime numbers"
 ```
 
-You can also pipe the prompt from stdin:
-
+You can also use non-interactive mode with an existing conversation file to provide context to the model:
 ```bash
-echo "Hello, world!" | ./nvidia-ai-chat --prompt=-
+./nvidia-ai-chat --prompt="What was the last thing we talked about?" /path/to/conversation.json
 ```
 
 ### Options
 
-For a full list of options, run:
-
-```bash
-./nvidia-ai-chat --help
-```
+For a full list of options, run `./nvidia-ai-chat --help`.
+
+#### General Options
+
+-   `-h, --help`: Show the help message and exit.
+-   `-l, --list`: List supported models and exit.
+-   `-m, --model NAME`: Specify the model ID to use (e.g., `mistralai/mistral-small-24b-instruct`).
+-   `-k, --access-token KEY`: Provide your API key directly.
+-   `--prompt TEXT|FILE|-`: Enable non-interactive mode and provide the prompt.
+-   `-s, --sys-prompt-file PATH`: Path to a file containing a system prompt to use for the session.
+-   `-S`: Persist the system prompt provided via `-s` to the conversation file.
+-   `--save-settings`: Persist the current session's model settings to the conversation file.
+-   `--modelinfo NAME`: Show detailed settings and capabilities for a specific model and exit.
+
+#### Model Setting Options
+
+These flags override the default settings for the current session. For model-specific details, ranges, and defaults, use the `/modelinfo <model_name>` command in interactive mode.
+
+-   `--temperature <0..1>`: Set the sampling temperature.
+-   `--top-p <0.01..1>`: Set the top-p sampling mass.
+-   `--max-tokens <number>`: Set the maximum number of tokens to generate.
+-   `--frequency-penalty <-2..2>`: Set the frequency penalty.
+-   `--presence-penalty <-2..2>`: Set the presence penalty.
+-   `--stop <string>`: Set a custom stop sequence.
+-   `--stream <true|false>`: Enable or disable streaming responses.
+-   `--history-limit <number>`: Set the maximum number of messages to keep in the conversation history.
+-   `--reasoning-effort <low|medium|high>`: Control the reasoning effort for capable models.
+-   ... and many more model-specific parameters. Use `/modelinfo` to discover them.
 
 ## License