add mutation testing for coverage gap analysis

Skip collected entries in policy query methods

Fix TimerWheel zero-boundary handling and async expiration delay

Use lambda parameter instead of captured outer variable

Use expiry parameter consistently in put fast paths

Avoid redundant scheduleDrainBuffers calls in hashCode and toString

Remove redundant CaffeineSpec validation, defer to builder

Fix ageOf to mask writeTime tag bit during refresh

Fix SerializationProxy dropping zero-duration expiration on round-trip

Fix CaffeineSpec sentinel collision for maximumSize, maximumWeight, initialCapacity

Fix UnboundedLocalCache.replace async notification bypass

add adversarial framing and parallel layers to analysis skills

codify the ad hoc analysis prompts into a structured toolbox

test polish

Add Fray concurrency test suite for instruction-level interleavings