Problem

Previously, when users greeted Lucidia with messages like "Hi Lucidia!", "Hello", or "Good morning", the agent would respond with the neutral sentiment response: "I see. How does that make you feel?" This created an awkward and impersonal first interaction that didn't align with Lucidia's philosophy of being empathetic, mindful, and kind.

Solution

This PR adds intelligent greeting detection and appropriate warm responses to make Lucidia more welcoming and human-like.

Changes

Added greeting detection:

• New GREETING_WORDS tuple containing common greetings: "hi", "hello", "hey", "greetings", "howdy", "hiya"
• New is_greeting() method that detects:
  • Common greeting words
  • Time-of-day greetings ("good morning", "good afternoon", "good evening", "good night")
  • Limits detection to short messages (≤ 5 words) to avoid false positives

Added context-aware greeting responses:

• First-time greeting: "Hello! I'm Lucidia. It's wonderful to meet you!"
• Return greeting (when conversation history exists): "Hello again! It's nice to hear from you."

Updated documentation:

• Modified module docstring examples to showcase the new greeting functionality
• All docstring examples now use separate AI instances to avoid memory-based side effects

Examples

Before:

>>> ai = LucidiaAI()
>>> ai.generate_response("Hi Lucidia!")
'I see.  How does that make you feel?'

After:

>>> ai = LucidiaAI()
>>> ai.generate_response("Hi Lucidia!")
"Hello!  I'm Lucidia.  It's wonderful to meet you!"

>>> ai.generate_response("I'm happy today")
>>> ai.generate_response("Hello")
"Hello again!  It's nice to hear from you."

Testing

• ✅ All 7 doctests pass
• ✅ Greeting detection works for various formats (Hi, Hello, Hey, Good morning, etc.)
• ✅ Non-greeting messages continue to work correctly with existing sentiment analysis
• ✅ Memory-aware greeting responses function as expected
• ✅ No breaking changes to existing functionality

This change makes Lucidia's first impression significantly warmer and more aligned with the project's goal of creating AI that nurtures and supports rather than simply answering questions.

Fixes #issue-number

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