January 2026 monthly summary for etcd-io/etcd focused on stabilizing the test suite and hardening cache recovery flows. Delivered a critical test stability fix by addressing a race condition in TestCacheCompactionResync, improving reliability of cache recovery under concurrent conditions. No new user-facing features released this month; emphasis was on reliability, maintainability, and CI stability. Commit f7029fdb75799ba657e192d164df2c685aebb5c0 deflates the TestCacheCompactionResync test by adding resetRegistered() to create a fresh channel for Phase 3, ensuring the test properly waits for cache completion. This work addresses issue #21150 and reduces flaky test behavior.