Use this to find:
- Previous discussions about a topic
- Decisions made in earlier sessions
- Context that was compacted away

Args:
    query: Natural language query
    project_filter: Limit to specific project path
    date_from: Inclusive lower timestamp bound. Accepts ISO-8601 datetime
        or date-only values such as 2026-06-13.
    date_to: Inclusive upper timestamp bound. Accepts ISO-8601 datetime
        or date-only values such as 2026-06-15.
    limit: Maximum results (default 5, min 1, max 50)
    use_hybrid: Use hybrid search (vector + BM25) for better results
        (default True)
    enable_analysis: Enable query analysis and result evaluation for
        improved relevance (default True). Adds 'analysis' and 'evaluation'
        to response.
    enable_synthesis: Enable result synthesis to combine multiple results
        into a coherent summary (default False). Adds 'synthesis' to response
        with key_points and deduplicated content.
    include_debug: Include detailed timing metrics and decision tracking
        in response (default False). Useful for debugging and performance
        analysis. Adds 'metrics' to response.

Returns:
    Dict with results list and metadata. When enable_analysis=True, includes:
    - analysis: Query intent, detected technologies, key terms
    - evaluation: Relevance score, completeness assessment
    When enable_synthesis=True, includes:
    - synthesis: Primary content, key points, code snippets
    When include_debug=True, includes:
    - metrics: Timing data (query_analysis_ms, search_ms, etc.), decisions made

Use this when user asks:
- "What did we change in auth.dart?"
- "Show me recent edits to the config files"
- "What files did we create?"

Args:
    file_path: Filter by file path (supports partial match)
    query: Semantic query about changes
    project_filter: Limit to specific project
    operation_filter: Filter by "edit" or "write"
    date_from: Inclusive lower timestamp bound. Accepts ISO-8601 datetime
        or date-only values such as 2026-06-13.
    date_to: Inclusive upper timestamp bound. Accepts ISO-8601 datetime
        or date-only values such as 2026-06-15.
    limit: Maximum results (default 10, min 1, max 50)

Returns:
    Dict with file change results

Use for:
- "What did we work on in the last session?"
- "Summarize our recent conversations"

Args:
    session_id: Specific session ID, or None for recent
    project_filter: Limit to specific project
    count: Number of sessions to summarize

Returns:
    Dict with session summaries

Use when user asks about memory system health or
why something isn't being found.

Returns:
    Dict with index statistics including:
    - total_chunks: Number of indexed chunks
    - projects_indexed: Number of unique projects
    - watched_files: Number of files being tracked
    - pending_files: Number of files in queue for processing
    - status: Overall health status
    - cache_stats: Search cache statistics (if enabled)

Use when you need to check server health, performance metrics,
indexing progress, or debug issues with the memory system.

Args:
    detail_level: "basic" for summary info, "full" for detailed metrics
                 including performance, cache stats, and errors

Returns:
    Dict with comprehensive server status including:
    - server: Version, uptime, PID, platform info
    - health: Overall status (healthy/degraded/unhealthy) and component checks
    - database: Chunk counts, size (full detail only)
    - indexing: Progress, files pending/indexed/failed (full detail only)
    - performance: Memory, CPU, query metrics (full detail only)
    - cache: Hit rates, size (full detail only)
    - embedder: Model info, loaded status (full detail only)
    - file_watcher: Running status, queue info (full detail only)
    - errors: Recent errors and counts (full detail only)
    - configuration: Current settings (full detail only)