sibyl-memory-langgraph

A LangGraph BaseStore backed by Sibyl Memory — durable, long-term, cross-thread memory for your agents on SQLite + FTS5. No vector database, no embeddings.

Install

pip install sibyl-memory-langgraph

Part of the Sibyl Memory plugin family. See the CHANGELOG for release notes.

from sibyl_memory_langgraph import SibylStore
from langgraph.graph import StateGraph

store = SibylStore()  # ~/.sibyl-memory/memory.db, free tier
graph = StateGraph(State, store=store)

Direct use:

store.put(("memories", "u1"), "fact1", {"text": "prefers dark mode"})
item = store.get(("memories", "u1"), "fact1")
hits = store.search(("memories",), query="dark mode")          # lexical, subtree
names = store.list_namespaces(prefix=("memories",))

Mapping

Scope

• Long-term Store only (not a checkpointer).
• search is lexical FTS5, not vector similarity.
• PutOp.index and PutOp.ttl are accepted and ignored (no embedding index, no TTL).
• Namespace elements must be non-empty and contain no / or ...

Identity

SibylStore() with no explicit client or tenant_id binds to the activated account: it reads ~/.sibyl-memory/credentials.json (written by sibyl init, looked up next to the DB file) and resolves the tenant via the canonical ladder

credentials.tenant_id  ->  credentials.account_id  ->  DEFAULT_TENANT

DEFAULT_TENANT is used only when no credentials are present (un-activated). The credentials file is symlink-guarded — a symlinked credentials.json is treated as absent rather than followed. Pass tenant_id="..." to override, or client=my_memory_client to use that client's tenant as-is.

Local-first & telemetry

Memory reads and writes are fully local — a SQLite database in ~/.sibyl-memory/, no network round-trip for any store operation. This adapter inherits the same posture as the underlying sibyl-memory-client:

• Un-activated (no credentials): zero network. Nothing leaves the machine.
• Activated (account credentials present): the client may send a privacy-preserving, debounced usage heartbeat — an aggregate operation count only, never memory content, query text, entity names, or PII beyond the account_id — plus the cap-verification ping that lets paid tiers exceed the free-tier local cap. Both are fire-and-forget and offline-safe.
• Opt out entirely with the environment variable SIBYL_MEMORY_TELEMETRY=0.

MIT. Built by Sibyl Labs, LLC.