lesliewangwyc-dev 1df389b9d0

fix: wrap blocking readability call with asyncio.to_thread in web_fetch (#2157) ...

* fix: wrap blocking readability call with asyncio.to_thread in web_fetch

The readability extractor internally spawns a Node.js subprocess via
readabilipy, which blocks the async event loop and causes a
BlockingError when web_fetch is invoked inside LangGraph's async
runtime.

Wrap the synchronous extract_article call with asyncio.to_thread to
offload it to a thread pool, unblocking the event loop.

Note: community/infoquest/tools.py has the same latent issue and
should be addressed in a follow-up PR.

Closes #2152

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: verify web_fetch offloads extraction via asyncio.to_thread

Add a regression test that monkeypatches asyncio.to_thread to confirm
readability extraction is offloaded to a worker thread, preventing
future refactors from reintroducing the blocking call.

Addresses Copilot review feedback on #2157.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

2026-04-13 21:15:24 +08:00

..

harness

fix: wrap blocking readability call with asyncio.to_thread in web_fetch (#2157)

2026-04-13 21:15:24 +08:00