These solutions are intended for learning and review purposes. If you're preparing for your own practice, try solving the problems yourself before checking the code!

second-brain/ ├── config.py ← all settings in one place ├── cli.py ← management CLI (ingest, chat, serve…) ├── requirements.txt │ ├── ingestion/ │ ├── parsers.py ← PDF, DOCX, Markdown, HTML, code │ ...