Minor updates to Subscribe.js, updated LLM_DEV_PROMPTS to latest version

LLM_DEV_PROMPTS/PYTHON PROJECTS/CODE_STYLEGUIDE_PYTHON.md

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+---
+title: Code Styleguide — Python
+last_modified: 2026-02-22
+---
+
+1. Standard Project Layout.  Use the src/ layout to prevent accidental imports from the root and ensure your project behaves like an installed package:
+
+my_project/
+├── pyproject.toml      # Modern tool & dependency configuration
+├── README.md           # Instructions for humans
+├── LICENSE             # Usage rights
+├── .gitignore          # Exclude venv/, __pycache__/, .env
+├── src/
+│   └── my_project/     # Main package
+│       ├── __init__.py
+│       ├── main.py     # Minimal entry point logic
+│       └── core.py     # Business logic
+├── tests/              # Mirror src structure for testing
+└── docs/               # Technical documentation
+
+2. Virtual Environments: Always isolate project dependencies using venv or pyenv to avoid conflicts with system-wide packages.
+
+3. Adhere to PEP 8: Use 4 spaces for indentation (no tabs), limit lines to 79 characters, and use two blank lines between top-level functions.
+
+4. Put code in functions. If you are writing a script, put the script in a
+function called `main` and call `main()` at the end of the script using the
+standard invocation:
+
+    ```python
+    if __name__ == "__main__":
+        main()
+    ```
+5. Keep main.py Boring: The entry point should only orchestrate (load config, start app). Heavy business logic should live in specialized modules.
+
+6. Config Isolation: Never hardcode secrets or database URLs. Use a .env file with libraries like python-dotenv or Pydantic Settings.
+
+7. Logging over Printing: Use Python’s built-in logging module to track errors and application state in production.
+
+8. Test-First: Treat your tests/ directory as first-class code. Use pytest for its powerful features and simple syntax.
+
+9. Naming Conventions: Use snake_case for functions and variables, PascalCase for classes, and UPPER_CASE for constants.
+
+10. pyproject.toml: Use this as the single source of truth for project metadata and tool configurations (replaces setup.py).
+
+11. Modular Design: Group code by domain (e.g., /users, /payments) rather than function (e.g., utils.py) to maintain separation of concerns.
+
+# Author
+
+[@sjdev](https://sjdev.co)
+<[sj@sjdev.co](mailto:sj@sjdev.berlin)>
+
+# License
+
+MIT. See [LICENSE](../LICENSE).