# NATS Strict Full Go Parity Map

| Capability | Behavior | Tests | Docs |
| --- | --- | --- | --- |
| Strict capability inventory guardrail | done | done | closed |
| Account-scoped remote delivery | open | open | open |
| Idempotent inter-server interest propagation | open | open | open |
| Gateway reply remap and leaf loop-marker transparency | open | open | open |
| MQTT packet-level parser and writer | open | open | open |
| MQTT session and QoS acknowledgement runtime | open | open | open |
| MQTT auth/TLS/keepalive integration | open | open | open |
| JetStream retention runtime semantics | open | open | open |
| JetStream consumer ack/backoff/replay/flow state machine | open | open | open |
| JetStream mirror/source runtime semantics | open | open | open |
| FileStore durable invariants and recovery contract | open | open | open |
| RAFT quorum/next-index/snapshot/membership semantics | open | open | open |
| JetStream meta/replica governance contracts | open | open | open |
| Runtime profiling and config option drift closure | open | open | open |
| Differences and parity-map synchronization | open | open | open |