lakehouse-memory 0.1.0b2

Unity Catalog-native episodic, semantic, and working memory for AI agents on Databricks

lakehouse-memory

Unity Catalog-native episodic, semantic, and working memory for AI agents on Databricks.

Status: Pre-release (0.1.0b1). Public from day one. The core library and LangChain adapters are workspace-validated; the DAB starter (M3) and docs site (M4) are not yet shipped. See the spec for design intent.

The pitch

Memory is the missing Databricks layer. The standard workaround is a sidecar vector DB with its own governance, access control, and lineage — a system you can't ship. Memory belongs in Unity Catalog, where your data already lives.

lakehouse-memory gives AI agents on Databricks three first-class memory primitives — episodic, semantic, and working — backed by Unity Catalog tables and Databricks Vector Search.

Install

pip install --pre lakehouse-memory

The --pre flag is required while the package is in pre-release. Once 0.1.0 ships (alongside the M3 DAB starter and M4 docs), pip install lakehouse-memory will work without the flag.

Quickstart

from lakehouse_memory import Memory, MemoryConfig, Scope
from lakehouse_memory.client import SqlConnectorClient
from lakehouse_memory.vector_databricks import DatabricksVectorIndex
import os

config = MemoryConfig(catalog="main", schema_name="agent_memory")

client = SqlConnectorClient(
    server_hostname=os.environ["DATABRICKS_HOST"].replace("https://", ""),
    http_path=os.environ["DATABRICKS_HTTP_PATH"],
    access_token=os.environ["DATABRICKS_TOKEN"],
)

index = DatabricksVectorIndex(
    endpoint_name=os.environ["DATABRICKS_VECTOR_SEARCH_ENDPOINT"],
    index_name=f"{config.catalog}.{config.schema_name}.episodic_idx",
    workspace_url=os.environ["DATABRICKS_HOST"],
    access_token=os.environ["DATABRICKS_TOKEN"],
    columns=["event_id", "text", "user_id", "session_id", "agent_id"],
)

mem = Memory(config=config, client=client, index=index, scope=Scope(user_id="u_1"))
mem.provision(
    vector_search_endpoint=os.environ["DATABRICKS_VECTOR_SEARCH_ENDPOINT"],
    workspace_url=os.environ["DATABRICKS_HOST"],
    access_token=os.environ["DATABRICKS_TOKEN"],
)

# Write a fact
mem.semantic.upsert(fact="User prefers SQL over Python.")

# Delta Sync indexes are TRIGGERED — explicitly fire the sync after writes.
# (For production, consider switching to CONTINUOUS pipelines.)
mem.semantic._index.trigger_sync()

# Wait for sync; production code would use exponential backoff
import time; time.sleep(15)

facts = mem.semantic.retrieve("language preferences", k=3)

LangChain integration:

chat = mem.as_langchain_chat_history(limit=50)
retriever = mem.as_langchain_retriever(k=5)

Production gaps

(Coming in M4. Short version: compaction at scale, multi-tenant RLS, regression evals, observability, and custom retrieval strategies are deliberately not in OSS. If you want help building past those, the Burmaster Databricks AI Practice does this for a living.)

License

Apache 2.0. See LICENSE.