fix(weixin): guard live_adapter session reuse against cross-loop calls

[Mr-z-j]

Bug Description

When send_message is invoked from the gateway context (e.g., cron jobs or tool callbacks), _run_async spawns the coroutine in a fresh thread with a new event loop. Reusing the live_adapter's ClientSession (which was bound to the gateway's original event loop) causes aiohttp to raise:

Timeout context manager should be used inside a task

This prevents Weixin proactive message delivery from working reliably in gateway mode.

Root Cause

aiohttp.ClientSession is bound to the event loop that created it. In the current code (gateway/platforms/weixin.py), send_weixin_direct() unconditionally reuses live_adapter._send_session if it exists and is not closed, without checking whether the current running loop matches the session's bound loop.

Fix

Before reusing the live adapter's session, verify that send_session._loop matches asyncio.get_running_loop(). If the loops differ (cross-loop call), fall back to creating a new ClientSession.

Changes

• gateway/platforms/weixin.py: added _session_loop / _current_loop check in send_weixin_direct()

Testing

• Verified that proactive send_message to Weixin works from gateway context after the fix
• Patch cleanly applies against origin/main (v0.11.0 + post-release commits)

Related

• This is a production bugfix; no new dependencies or API changes.
• Fixes Weixin proactive message delivery failures in multi-threaded gateway scenarios.

[alt-glitch]

Likely duplicate of #12810 — same root cause: cross-event-loop aiohttp session reuse in send_weixin_direct(). See also #14481, #13520, #14384 for prior attempts at the same fix.

[Mr-z-j]

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[teknium1]

Thanks for the focused Weixin cross-loop fix. This is already implemented on current main.

• Automated hermes-sweeper review verified gateway/platforms/weixin.py:2307-2336: reuse of the live adapter is gated by send_session._loop is asyncio.get_running_loop(); a loop mismatch falls through to a fresh aiohttp.ClientSession.
• The matching fix landed as a22465e07ab4b71019f711e7a6463f6590c50742 (fix(weixin): send_weixin_direct cross-loop session check) and is included in v2026.5.7.
• This matches the duplicate discussion linking fix(weixin): skip live adapter reuse in send_weixin_direct when on a different event loop #12810 and the other cross-loop Weixin proposals.

Closing as implemented on main.

[Mr-z-j]

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