Fix Python 3.14 event loop crash and tool dispatch for None args

[hiroshinishio]

Summary

• Fix Mangum crash on Python 3.14: asyncio.get_event_loop() no longer creates implicit event loops, causing every webhook invocation to fail with RuntimeError. Ensure one exists before calling mangum_handler.
• Fix tool dispatch silently skipping execution when model passes None args (e.g. verify_task_is_complete). Gemma called the tool with args=None instead of args={}, the dispatcher's isinstance(tool_args, dict) check skipped it entirely, and the model entered a dead loop returning empty responses for 20 iterations.
• Add Claude Code hook to block --no-verify on git commit

Social Media Post (GitAuto)

Two silent failures in one deploy. Python 3.14 removed implicit event loop creation, crashing every webhook through our ASGI adapter. And when a model passed None instead of empty dict as tool args, the dispatcher skipped execution entirely. The model got a None result back, went blank, and burned 20 iterations doing nothing. Both were one-line-level fixes hidden behind hours of log reading.

Social Media Post (Wes)

Spent an hour reading CloudWatch logs for a bug that was five lines to fix. Python 3.14 changed asyncio.get_event_loop() to raise instead of creating a loop. Our webhook adapter used the old pattern. Schedule triggers worked fine since they bypass the adapter. Then found a second bug: when the model passes None instead of {} as tool args, we silently skip the tool call. The model gets None back and gives up. Two invisible failures, two small fixes.