Adds plugins/web/ddgs/ following the same plugins/image_gen/ pattern as
brave_free. DuckDuckGo search via the community ddgs package; no API key,
package is an optional dep gated by is_available().
E2E verified — registry now has ['brave-free', 'ddgs'].
Adds plugins/web/brave_free/ as the first plugin built against the new
WebSearchProvider ABC. Mirrors the plugins/image_gen/openai/ layout exactly:
plugins/web/brave_free/
plugin.yaml kind: backend, provides_web_providers: [brave-free]
__init__.py register(ctx) -> ctx.register_web_search_provider(...)
provider.py BraveFreeWebSearchProvider(WebSearchProvider)
Behavior preserved: same name ("brave-free" with hyphen), same env var
(BRAVE_SEARCH_API_KEY), same HTTP request shape, same response normalization.
The legacy tools/web_providers/brave_free.py is left in place — the
dispatcher in tools/web_tools.py still references it. Task 7 cuts over the
dispatcher to the new registry; Task 10 deletes the legacy file.
E2E verified:
HERMES_PLUGINS_DEBUG=1 python -c "
from hermes_cli.plugins import _ensure_plugins_discovered
_ensure_plugins_discovered()
from agent.web_search_registry import list_providers
print([p.name for p in list_providers()])
"
# -> ['brave-free']
