{"content":"I'm crafting a challenge with advanced patterns requiring complex techniques: negative lookahead/lookbehind, domain-literal IPv6, optional/variable whitespace and punctuation in phone numbers, multiple date/time formats, GUID, checksums, MAC addresses, IPv6 addresses, trick invalid email addresses, quoted local parts, and more. This will require a single regex that can handle these diverse, tricky patterns without false matches, pushing the player's regex skills to the limit.","function_call":{"name":"make_move","arguments":"{\n  \"reasoning\": \"I'm crafting a challenge with advanced patterns requiring complex techniques: negative lookahead/lookbehind, domain-literal IPv6, optional/variable whitespace and punctuation in phone numbers, multiple date/time formats, GUID, checksums, MAC addresses, IPv6 addresses, trick invalid email addresses, quoted local parts, and more. This will require a single regex that can handle these diverse, tricky patterns without false matches, pu... (truncated)