Agents have Amnesia. I Gave It a RocksDB.

Agents often start each session from scratch, lacking shared memory. The usual solution involves manually maintaining a rules file or CLAUDE.md. However, RocksDB offers a superior alternative. It provides ordered keys, column families for tiered retention, and LSM storage, perfect for writing-heavy event logs. The primary constraint is that there can only be one read-write process per database, which RocksDB handles with a lock file.

To overcome this, RocksDB can be used with a single master process that other sessions query, eliminating the need for multiple long-lived processes. Additionally, RocksDB's TTL feature allows automatic expiration of less relevant data, while its LSM tree structure and checkpointing enable fast query times and efficient memory management.