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* feat(web): add Parallel as alternative web search/extract backend Adds Parallel (parallel.ai) as a drop-in alternative to Firecrawl for web_search and web_extract tools using the official parallel-web SDK. - Backend selection via WEB_SEARCH_BACKEND env var (auto/parallel/firecrawl) - Auto mode prefers Firecrawl when both keys present; Parallel when sole backend - web_crawl remains Firecrawl-only with clear error when unavailable - Lazy SDK imports, interrupt support, singleton clients - 16 new unit tests for backend selection and client config Co-authored-by: s-jag <s-jag@users.noreply.github.com> * fix: add PARALLEL_API_KEY to config registry and fix web_crawl policy tests Follow-up for Parallel backend integration: - Add PARALLEL_API_KEY to OPTIONAL_ENV_VARS (hermes doctor, env blocklist) - Add to set_config_value api_keys list (hermes config set) - Add to doctor keys display - Fix 2 web_crawl policy tests that didn't set FIRECRAWL_API_KEY (needed now that web_crawl has a Firecrawl availability guard) * refactor: explicit backend selection via hermes tools, not auto-detect Replace the auto-detect backend selection with explicit user choice: - hermes tools saves WEB_SEARCH_BACKEND to .env when user picks a provider - _get_backend() reads the explicit choice first - Fallback only for manual/legacy config (uses whichever key is present) - _is_provider_active() shows [active] for the selected web backend - Updated tests, docs, and .env.example to remove 'auto' mode language * refactor: use config.yaml for web backend, not env var Match the TTS/browser pattern — web.backend is stored in config.yaml (set by hermes tools), not as a WEB_SEARCH_BACKEND env var. - _load_web_config() reads web: section from config.yaml - _get_backend() reads web.backend from config, falls back to key detection - _configure_provider() saves to config dict (saved to config.yaml) - _is_provider_active() reads from config dict - Removed WEB_SEARCH_BACKEND from .env.example, set_config_value, docs - Updated all tests to mock _load_web_config instead of env vars --------- Co-authored-by: s-jag <s-jag@users.noreply.github.com>
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