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Web Search Provider ABC
=======================

Defines the pluggable-backend interface for web search and content extraction.
Providers register instances via ``PluginContext.register_web_search_provider()``;
the active one (selected via ``web.search_backend`` / ``web.extract_backend`` /
``web.backend`` in ``config.yaml``) services every ``web_search`` /
``web_extract`` tool call.

Providers live in ``<repo>/plugins/web/<name>/`` (built-in, auto-loaded as
``kind: backend``) or ``~/.hermes/plugins/web/<name>/`` (user, opt-in via
``plugins.enabled``).

This ABC is the SINGLE plugin-facing surface for web providers — every
provider in the tree (brave-free, ddgs, searxng, exa, parallel, tavily,
firecrawl) implements it. The legacy in-tree ``tools.web_providers.base``
ABCs were deleted in PR #25182 along with the per-vendor inline helpers
in ``tools/web_tools.py``; the response-shape contract documented below
is preserved bit-for-bit so the tool wrapper does not have to translate.

Response shape (preserved from the legacy contract):

Search results::

    {
        "success": True,
        "data": {
            "web": [
                {"title": str, "url": str, "description": str, "position": int},
                ...
            ]
        }
    }

Extract results::

    {
        "success": True,
        "data": [
            {"url": str, "title": str, "content": str,
             "raw_content": str, "metadata": dict},
            ...
        ]
    }

On failure (either capability)::

    {"success": False, "error": str}
    )annotationsN)AnyDictListc                      e Zd ZdZeej        dd                        Zedd            Zej        dd            Z	ddZ
dd	ZdddZddZddZdS )WebSearchProvideru  Abstract base class for a web search/extract backend.

    Subclasses must implement :meth:`is_available` and at least one of
    :meth:`search` / :meth:`extract`. The :meth:`supports_search` /
    :meth:`supports_extract` capability flags let the registry route each
    tool call to the right provider, and let multi-capability providers
    (Firecrawl, Tavily, Exa, …) advertise multiple capabilities from a
    single class.
    returnstrc                    dS )a*  Stable short identifier used in ``web.search_backend`` /
        ``web.extract_backend`` / ``web.backend`` config keys.

        Lowercase, no spaces; hyphens permitted to preserve existing
        user-visible names. Examples: ``brave-free``, ``ddgs``,
        ``searxng``, ``firecrawl``.
        N selfs    >/home/ubuntu/.hermes/hermes-agent/agent/web_search_provider.pynamezWebSearchProvider.nameJ             c                    | j         S )zEHuman-readable label shown in ``hermes tools``. Defaults to ``name``.)r   r   s    r   display_namezWebSearchProvider.display_nameU   s     yr   boolc                    dS )u  Return True when this provider can service calls.

        Typically a cheap check (env var present, optional Python dep
        importable, instance URL set). Must NOT make network calls — this
        runs at tool-registration time and on every ``hermes tools`` paint.
        Nr   r   s    r   is_availablezWebSearchProvider.is_availableZ   r   r   c                    dS )z7Return True if this provider implements :meth:`search`.Tr   r   s    r   supports_searchz!WebSearchProvider.supports_searchc   s    tr   c                    dS )u  Return True if this provider implements :meth:`extract`.

        Both sync and async :meth:`extract` implementations are valid — the
        dispatcher detects coroutine functions via
        :func:`inspect.iscoroutinefunction` and awaits as needed. Sync
        implementations that perform blocking I/O (HTTP, SDK calls) should
        ideally wrap in :func:`asyncio.to_thread` at the call site; small
        providers can keep their sync shape and let the dispatcher handle
        threading.
        Fr   r   s    r   supports_extractz"WebSearchProvider.supports_extractg   s	     ur      querylimitintDict[str, Any]c                0    t          | j         d          )zExecute a web search.

        Override when :meth:`supports_search` returns True. The default
        raises NotImplementedError; callers should gate on
        :meth:`supports_search` before calling.
        z3 does not support search (override supports_search)NotImplementedErrorr   )r   r   r   s      r   searchzWebSearchProvider.searcht   s$     "yMMM
 
 	
r   urls	List[str]kwargsr   c                0    t          | j         d          )u$  Extract content from one or more URLs.

        Override when :meth:`supports_extract` returns True. The default
        raises NotImplementedError; callers should gate on
        :meth:`supports_extract` before calling.

        Return shape: a list of result dicts matching what the legacy
        :func:`tools.web_tools.web_extract_tool` post-processing pipeline
        expects::

            [
                {
                    "url": str,
                    "title": str,
                    "content": str,
                    "raw_content": str,
                    "metadata": dict,           # optional
                    "error": str,               # optional, only on per-URL failure
                },
                ...
            ]

        Implementations MAY be ``async def`` — the dispatcher detects
        coroutines via :func:`inspect.iscoroutinefunction` and awaits.

        ``kwargs`` may carry forward-compat fields (``format``, ``include_raw``,
        ``max_chars``) — implementations should ignore unknown keys.
        z5 does not support extract (override supports_extract)r"   )r   r%   r'   s      r   extractzWebSearchProvider.extract   s$    : "yOOO
 
 	
r   c                    | j         ddg dS )u  Return provider metadata for the ``hermes tools`` picker.

        Used by ``hermes_cli/tools_config.py`` to inject this provider as a
        row in the Web Search / Web Extract picker. Shape::

            {
                "name": "Brave Search (Free)",
                "badge": "free",
                "tag": "No paid tier needed — uses Brave's free API.",
                "env_vars": [
                    {"key": "BRAVE_SEARCH_API_KEY",
                     "prompt": "Brave Search API key",
                     "url": "https://brave.com/search/api/"},
                ],
            }

        Default: minimal entry derived from ``display_name``. Override to
        expose API key prompts, badges, and instance URL fields.
         )r   badgetagenv_vars)r   r   s    r   get_setup_schemaz"WebSearchProvider.get_setup_schema   s"    * %	
 
 	
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