I built echomine to search through my 2+ years of AI chat history. After exporting
  from ChatGPT and Claude, I had thousands of conversations with no way to find anything.

  It's a Python library + CLI that:
  - Streams large exports (1GB+) with O(1) memory via ijson
  - BM25 relevance ranking for keyword search
  - Filters by date range, message role, title
  - Exports conversations to Markdown
  - Auto-detects OpenAI vs Claude export format

  Quick start:
    pip install echomine
    echomine search conversations.json --keywords "async python"
    echomine list conversations.json --sort messages --limit 10

  Also works as a library for building your own tools:
    from echomine import OpenAIAdapter, ClaudeAdapter

  Strict typing (mypy --strict), 94%+ test coverage, no external API calls -
  everything runs locally on your exported data.

  Looking for feedback on search relevance and what other export formats
  would be useful (Gemini? Local LLMs?).