Summary

Targets KG red #75, where custom_kernel returns _g.send(data) from a module-level primed generator. The generator frame stores the first output and subsequent timed calls replay that saved value.

This adds a narrow GENERATOR_SEND_REPLAY detector. It requires:

• a module-level generator object built from a function containing yield
• explicit priming via next(g) or g.send(None)
• an entrypoint return of g.send(<input parameter>)
• yielded state assigned from the sent input behind an input-independent gate

The last condition keeps normal coroutine-style generators that compute on every send out of scope.

KernelGuard-Red-Submission: 75

Local verification

• red_01_generator_replay -> GENERATOR_SEND_REPLAY, should_filter=True
• clean_generator_helper -> stays valid
• clean_coroutine_send -> stays valid
• clean_unprimed_generator -> stays valid
• python -m py_compile kernelguard.py