bird

The project correctly uses environment variables for API tokens, avoiding hardcoded secrets. `httpx` and `asyncio.to_thread` are used for safe asynchronous network and API calls. Basic input sanitization for Obsidian filenames is present. The use of `pickle` for Google Calendar OAuth tokens is a standard pattern for Google API client libraries but can pose a deserialization risk if the token file itself is untrusted or tampered with. AnkiConnect communicates over unencrypted HTTP, but it's typically a local connection. Overall, for a personal assistant tool, the security practices are generally robust, but users must ensure their `.env` file and token files are securely protected.