Query syntax highlights:

    - ``repo:NAME`` restrict to repos whose name matches NAME (regex)
    - ``file:PATH`` restrict to files whose path matches PATH (regex)
    - ``lang:LANGUAGE`` restrict to a language (``python``, ``go``, ...)
    - ``sym:IDENT`` match symbol definitions (functions, classes, ...)
    - ``case:yes`` case-sensitive content match
    - ``/regex/`` regex content match (literal match by default)
    - whitespace is AND; use ``or`` for boolean OR

    Examples:

    - ``lang:python def hello`` — Python files containing ``def hello``
    - ``sym:users`` — anything that defines a ``users`` symbol
    - ``repo:flask-app file:app.py`` — within one file of one repo

    Returns a compact object with ``files`` (each containing ``repo``,
    ``file``, ``language``, and ``matches``) plus top-level stats.
    Results are capped at ``max_results`` files.
    

    ``filter`` is an optional ``repo:`` atom (e.g. ``repo:flask`` or
    ``repo:.`` for all) used to narrow the list. Leave empty to list
    every indexed repository.

    Returns ``{"repos": [{name, url, branches, ...}, ...], "count": N}``.
    

    ``repo`` is the repository name as reported by ``list_repos``;
    ``path`` is the file path within that repo; ``branch`` defaults
    to ``HEAD`` but can be any branch zoekt has indexed. Returns
    ``{"repo", "path", "branch", "content"}``.