# Source preview layout metadata
PREVIEW_INSTRUCTIONS = """
### 📂 Data Ingestion Instructions
- Supported files: PDF, DOCX, CSV, TXT, MD, JSON, JSONL.
- The normalized source context removes redundant markup, formatting, and white space to build a strict, clean baseline context.
- Estimations use the standard 4-character to 1-token ratio; exact tokens are counted live on the server.
"""