pymemoryos 0.1.1

Compact Qdrant-backed memory for host-owned LLM applications.

memory-os

Compact Qdrant-backed memory for AI applications.

MemoryOS does not generate final answers. Your application owns the chat flow and the user-facing LLM call. MemoryOS extracts multiple important memory chunks from the user's prompt, stores those chunks separately in Qdrant, applies forgetting-curve style decay to them over time, and also keeps a small rolling prompt/response history per session.

Public API

pip install pymemoryos
from memory_os import MemoryOS

memory = MemoryOS(
    qdrant_url="https://your-qdrant-url",
    qdrant_api_key="your-qdrant-api-key",
    llm=configured_llm,                    # any object with .invoke()
    session_id="user_123",
)

memory.store(prompt: str, response: str) -> None
memory.retrieve(prompt: str) -> dict

That is the entire intended surface.

Usage

context = memory.retrieve(user_prompt)

final_response = host_llm.invoke(
    f"Relevant memory:\n{context}\n\nUser:\n{user_prompt}"
)

memory.store(user_prompt, final_response)

Behavior

• store(prompt, response) calls llm.invoke(...) once to distill the completed prompt into multiple important memory chunks.
• store(prompt, response) embeds each extracted memory chunk with an internal SentenceTransformer model, then upserts those chunks separately to Qdrant.
• store(prompt, response) also stores the raw prompt/response pair in a simple rolling session history capped at 7 pairs.
• retrieve(prompt) embeds the current prompt with the same internal SentenceTransformer model, then queries Qdrant for relevant memories.
• retrieve(prompt) reranks Qdrant hits using an Ebbinghaus-style decay score: similarity * decay_score * importance * emotional_weight.
• retrieve(prompt) also returns the latest 4-5 stored prompt/response pairs for the same session as immediate context.
• All Qdrant reads and writes are filtered by session_id.
• When an old pair is evicted from the 7-pair history, the Qdrant memory chunks created from that prompt are also removed.
• Each stored memory chunk keeps decay state in Qdrant payload, including last_accessed, access_count, stability, importance, emotion, emotional_weight, decay_score, final_score, and last_similarity.

Retrieve shape

{
    "recent_pairs": [
        {"prompt": "...", "response": "...", "created_at": 1720000000.0},
    ],
    "memories": [
        {
            "text": "...",
            "score": 0.92,
            "created_at": 1720000000.0,
            "decay_score": 0.81,
            "importance": 0.9,
            "emotion": "fear",
        },
    ],
}

Boundaries

• MemoryOS never generates the final answer to a user query.
• MemoryOS uses llm.invoke() only to break the user's prompt into storable memory chunks.
• MemoryOS uses an internal SentenceTransformer embedder for vector storage and retrieval.
• Required init config is exactly qdrant_url, qdrant_api_key, llm, and session_id.