Update ask2api CLI to include environment variable support and enhance help documentation

- Added support for environment variables to configure API settings, including `OPENAI_API_KEY`, `ASK2API_BASE_URL`, `ASK2API_MODEL`, and `ASK2API_TEMPERATURE`.
- Improved the help output of the CLI by including detailed descriptions for each argument and environment variable.
- Updated version in `pyproject.toml` to 0.3.0 and reflected changes in CHANGELOG.md.

Author: atasoglu

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.0] - 2025-12-27
+
+### Changed
+- Refactored API configuration to use `Config` dataclass for better maintainability
+- Replaced hardcoded API settings with configurable values
+- Added environment variable support for API configuration:
+  - `ASK2API_BASE_URL` - Override the base API URL (default: `https://api.openai.com/v1`)
+  - `ASK2API_MODEL` - Override the model name (default: `gpt-4.1`)
+  - `ASK2API_TEMPERATURE` - Override the temperature setting (default: `0`)
+
 ## [0.2.1] - 2025-02-27
 
 ### Added

ask2api.py

@@ -92,12 +92,39 @@ def get_version():
 
 
 def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument("-p", "--prompt", required=True)
-    parser.add_argument("-sf", "--schema-file", required=True)
-    parser.add_argument("-i", "--image")
+    env_vars_help = """
+Environment Variables:
+  OPENAI_API_KEY          OpenAI API key (required)
+  ASK2API_BASE_URL        Base API URL (default: https://api.openai.com/v1)
+  ASK2API_MODEL           Model name (default: gpt-4.1)
+  ASK2API_TEMPERATURE     Temperature setting (default: 0)
+"""
+    parser = argparse.ArgumentParser(
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog=env_vars_help,
+    )
+    parser.add_argument(
+        "-p",
+        "--prompt",
+        required=True,
+        help="Natural language prompt",
+    )
+    parser.add_argument(
+        "-sf",
+        "--schema-file",
+        required=True,
+        help="Path to JSON schema file",
+    )
+    parser.add_argument(
+        "-i",
+        "--image",
+        help="Path to image file or image URL",
+    )
     parser.add_argument(
-        "-v", "--version", action="version", version=f"%(prog)s {get_version()}"
+        "-v",
+        "--version",
+        action="version",
+        version=f"%(prog)s {get_version()}",
     )
     args = parser.parse_args()
 

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "ask2api"
-version = "0.2.1"
+version = "0.3.0"
 description = "A minimal CLI tool that turns natural language into instant APIs."
 readme = "README.md"
 authors = [