llama-index-memory-itsuki
Itsuki long-term memory for LlamaIndex, as a memory
block inside the host's own Memory class.
pip install llama-index-memory-itsuki
from llama_index.memory.itsuki import itsuki_memory
memory = itsuki_memory(user_id="user_42", session_id="thread_9")
response = await agent.run("What am I working on?", memory=memory)
Set ITSUKI_API_KEY in your environment. Create one at
itsuki.app under API Keys.
A block, not a replacement
LlamaIndex has deprecated the BaseMemory generation that older third-party
integrations target — ChatMemoryBuffer, SimpleComposableMemory and friends
are on the way out. The current architecture is the Memory class composing
BaseMemoryBlock subclasses, so that is what this ships.
Short-term chat history keeps working exactly as the host intends. Itsuki
becomes the long-term half: _aget supplies durable memory for the turn, and
_aput stages messages as they flush out of short-term memory.
Compose it yourself if you want a different arrangement:
from llama_index.core.memory import Memory
from llama_index.memory.itsuki import itsuki_memory_block
memory = Memory.from_defaults(
session_id="thread_9",
memory_blocks=[itsuki_memory_block("user_42", session_id="thread_9")],
)
Async, on purpose
BaseMemoryBlock is async-first, so this uses the Itsuki SDK's
AsyncMemoryClient. A synchronous client here would block the event loop the
agent runs on, once per step, for the length of an HTTP round trip.
Scoping
| Argument | Meaning |
|---|---|
user_id |
the memory space — required, no default |
session_id |
the conversation, and the de-duplication anchor |
agent_id, run_id |
attribution only |
project_id |
attribution, and enables project-scoped recall |
search_msg_limit (default 5) controls how many recent turns inform the recall
query.
Behaviour under failure
_aget returns an empty string and _aput returns quietly. A memory outage
costs the agent context, never the answer. The API key is a private attribute,
so it never appears in model_dump(), an export, or serialized agent state.
License
Apache-2.0
1 maintainer
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