Required CSV headers (case-insensitive):

• name
• phones (semicolon-separated if multiple)
• email
• address, city, state, zip
• notes (optional)

Example row: Jane Wave,"7135552222; 8325557777",jane@acme.com,1401 Main St,Houston,TX,77002,"Met at expo"

Tip: You can include extra columns; they’ll be preserved under extra.

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