Add conversation summarizer tool with greeting detection

[Copilot]

Implements a tool to summarize conversation histories (user/assistant message pairs) into structured summaries. Detects greeting-only conversations and prompts users to provide substantive content.

Changes

• conversation_summarizer.py - Python CLI tool that:

  • Parses JSON conversation arrays and extracts structured sections (TITLE, USER INTENT, TASK DESCRIPTION, EXISTING, PENDING, CODE STATE, RELEVANT CODE/DOCUMENTATION SNIPPETS, OTHER NOTES)
  • Detects when conversations contain only greetings (e.g., "Hi", "Hihi") and returns guidance message instead of attempting summarization
  • Accepts input via file argument or stdin

• example_conversations/ - Sample inputs demonstrating both greeting-only and substantive conversations

• README.md - Usage documentation and input format specification

Usage

# File input
python conversation_summarizer.py example_conversations/full.json

# Stdin
echo '[{"role":"user","content":"Implement OAuth2"}]' | python conversation_summarizer.py

Greeting-only conversations trigger:

I don't see a conversation to summarize in your messages. You've only sent brief greetings so far.

Could you please provide the conversation history...

Original prompt

Hihi

I don't see a conversation to summarize in your messages. You've only sent "Hi" and "Hihi" so far.

Could you please provide the conversation history (the series of user/assistant message pairs) that you'd like me to summarize? Once you share the conversation, I'll create a detailed summary following the format you've specified:

• TITLE
• USER INTENT
• TASK DESCRIPTION
• EXISTING
• PENDING
• CODE STATE
• RELEVANT CODE/DOCUMENTATION SNIPPETS
• OTHER NOTES

Please paste the conversation you'd like summarized, and I'll help you right away!

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