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Guide for using Simba 5, the JVM leader-election and distributed-lock library, in applications. Use when adding leader election, leader-only work (runWhileLeader, schedule, @SimbaScheduled), partitioned work (group, @SimbaPartitioned), distributed locks (lock / LockTerm), configuring the JDBC (MySQL, PostgreSQL), Redis or Zookeeper backend, integrating with Spring Boot, using fencing tokens, tuning session timing, or migrating from Simba 4.x. For test-focused work, use the simba-testing skill as well.

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Guide for testing code built on Simba 5 (leader election and distributed locks). Use when writing or reviewing tests for LeadershipListener callbacks, runWhileLeader / schedule work, partition groups, locks, @SimbaScheduled / @SimbaPartitioned beans, fencing-token resources (FencingSpec), LeaseBackend implementations (LeaseBackendSpec), or deterministic failover tests with InMemoryLeaseBackend and VirtualScheduler.

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