Add README and make model configurable

README.md

@@ -0,0 +1,45 @@
+# slm
+
+A simple command-line tool to interact with an LLM API.
+
+## Configuration
+
+The tool reads its configuration from `~/.config/slm/config.toml`.
+
+### Config File Format
+
+```toml
+api_key = "your_api_key_here"
+server_url = "https://your-api-server.com/v1/chat/completions"
+model = "nvidia/Gemma-4-31B-IT-NVFP4"
+```
+
+| Field | Description |
+| :--- | :--- |
+| `api_key` | Your API authentication key. |
+| `server_url` | The full URL to the chat completions endpoint. |
+| `model` | The identifier of the model to use. |
+
+## Usage
+
+By default, `slm` reads from standard input and sends it to the configured model.
+
+### Basic Example
+
+```bash
+echo "Hello, how are you?" | slm
+```
+
+### With a Prompt
+
+You can append a specific prompt to the input using the `-p` or `--prompt` argument. This is useful for giving the model a persona or specific instructions.
+
+```bash
+echo "the capital of France" | slm -p "Answer in one word."
+```
+
+## Arguments
+
+| Argument | Short | Description |
+| :--- | :--- | :--- |
+| `--prompt <TEXT>` | `-p` | Optional prompt to append to the content read from stdin. |