These are all the config fuzzer suites we run as of Aug 2024:

• antithesis_config_fuzzer_stress_concurrency_sharded_replication
• config_fuzzer_concurrency_replication
• config_fuzzer_concurrency_sharded_replication
• config_fuzzer_concurrency_simultaneous_replication
• config_fuzzer_jsCore
• config_fuzzer_jstestfuzz_concurrent_replication
• config_fuzzer_jstestfuzz_concurrent_sharded_continuous_stepdown
• config_fuzzer_replica_sets_jscore_passthrough
• config_fuzzer_sharding_jscore_passthrough
• config_fuzzer_simulate_crash_concurrency_replication
• config_fuzzer_stress_concurrency_replication
• config_fuzzer_stress_concurrency_sharded_replication

Although we added the initial sync method (logical / FCBIS) to the list of config fuzzer params, we don't actually run initial sync other than at the very beginning when we set up the cluster. It's not clear whether this very limited coverage was known / intentional.