* feat(community): add Unbrowse web fetch provider
Add a community web_fetch provider backed by Unbrowse
(https://unbrowse.ai), a hosted service that returns a page as markdown,
over plain HTTP when that is enough and through a cloud browser when the
page needs JavaScript. The tool sends one JSON-RPC tools/call POST
(unbrowse.scrape) to Unbrowse's MCP endpoint, so it needs no extra Python
package and no MCP client (uses httpx, already a dependency).
Unbrowse is not a general web search engine, so only web_fetch is added.
Changes:
- backend/packages/harness/deerflow/community/unbrowse/{__init__,tools}.py
web_fetch_tool with the same output shape as the Sofya, Exa and
Firecrawl fetch tools (# <title> plus markdown, 4KB cap). API key is read
from the config.yaml api_key field or the UNBROWSE_API_KEY env var.
Optional render: auto|never|always; unknown values log a warning and fall
back to auto. JSON-RPC errors, isError tool results, HTTP errors and
malformed payloads come back as "Error: ..." strings.
- backend/tests/test_unbrowse_tools.py: key resolution, render handling,
request shape, structuredContent vs text payloads, error paths.
- scripts/doctor.py, scripts/wizard/providers.py: register the key and the
web_fetch provider; backend/tests/test_doctor.py covers both doctor paths.
- config.example.yaml, .env.example, backend/docs/CONFIGURATION.md,
tools/AGENTS.md, EN/ZH harness/tools.mdx: document the provider.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* docs(changelog): add Unbrowse web_fetch provider entry
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
f889ce7517