kora-core

Core data structures, shard engine, and memory management for Kōra.

This crate has zero workspace dependencies — it sits at the bottom of the workspace dependency graph and every other Kōra crate builds on top of it. The main abstractions are:

• types::Value — the polymorphic value representation (inline strings, heap strings, integers, lists, sets, hashes, sorted sets, streams, vectors).
• types::CompactKey / types::KeyEntry — compact key storage with per-key metadata (TTL, LFU counter, storage tier).
• shard::ShardStore — a single-threaded key-value store that executes commands against its partition of the keyspace.
• shard::ShardEngine — coordinates N worker threads, each owning one ShardStore, and routes commands by key hash.
• command::Command / command::CommandResponse — the full command vocabulary and response types that bridge the protocol layer and the engine.

The simulation feature gate enables a deterministic simulation testing framework (see the sim module).