neuragram 1.0.0

A lightweight, standalone, framework-agnostic agent memory library — the SQLite of agent memory

Engram

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Lightweight, framework-agnostic memory layer for AI agents. Built on SQLite + sqlite-vec + FTS5 — no external services required.

pip install neuragram

from engram import AgentMemory

mem = AgentMemory(db_path="./memory.db")
mem.remember("User prefers concise code explanations", user_id="u1", type="preference")
results = mem.recall("What style does the user prefer?", user_id="u1")
print(results[0].memory.content)
mem.close()

Comparison

	Engram	Mem0	Letta	Graphiti
Install	pip install neuragram	pip install	Docker + Server	pip + Neo4j
External Deps	None	Vector DB + LLM	PG + Server + LLM	Graph DB + LLM
Framework Lock-in	None	None	Letta runtime	None
Memory Lifecycle	Built-in	None	Agent self-managed	Partial
LLM Required	No	Yes	Yes	Yes

Features

Storage & Retrieval

• Hybrid search — vector similarity + FTS5 keyword + recency scoring, fused via Reciprocal Rank Fusion
• Explainable ranking — explain() returns full score breakdown per result (vector rank, keyword rank, RRF contribution, recency factor)
• LRU cache — hot-path memory lookups served from in-memory cache
• Performance tuned — WAL mode, 64 MB page cache, mmap, batch operations in single transactions

Memory Intelligence

• Smart remember — auto-classifies memory type, importance, and confidence (rule-based or LLM-enhanced)
• Conversation extraction — extracts structured memories from chat messages (requires LLM)
• Conflict detection & resolution — detects contradicting memories and resolves automatically
• Consolidation — merges similar memories into summaries to reduce noise

Lifecycle Management

• TTL expiration — memories with expires_at are automatically expired
• Inactivity archival — memories not accessed for N days are archived
• GDPR forgetting — forget(user_id="u1") removes all user data
• Background worker — create_worker() runs maintenance tasks on a schedule
• Version history — every update is versioned; full history via history()

Multi-tenancy & Access Control

• Isolation — namespace + user_id + agent_id scoping on all operations
• Role-based access — AccessLevel.READ / WRITE / ADMIN with namespace and user scoping
• Namespace statistics — per-namespace memory distribution via namespace_stats()

Integrations

• Claude Code — available as a Claude Code plugin via marketplace or manual MCP setup
• MCP Server — engram-mcp CLI exposes Engram as an MCP tool server (Claude Desktop, Cursor, etc.)
• REST API — engram-api CLI starts a FastAPI HTTP service with 12 endpoints
• LangChain — EngramMemory implements BaseMemory (save_context / load_memory_variables)
• LlamaIndex — EngramChatMemory provides put / get / get_all / reset

Observability

• OpenTelemetry — automatic traces, metrics, and spans for all operations; zero-overhead no-op when OTel is not installed

Usage

Embeddings

# OpenAI
mem = AgentMemory(db_path="./memory.db", embedding="openai", embedding_model="text-embedding-3-small")

# Local (sentence-transformers)
mem = AgentMemory(db_path="./memory.db", embedding="local")

# No embeddings (keyword-only retrieval)
mem = AgentMemory(db_path="./memory.db")

Smart Remember

from engram import AgentMemory, CallableLLMProvider

async def my_llm(prompt):
    return await call_my_llm(prompt)

mem = AgentMemory(db_path="./memory.db", llm=CallableLLMProvider(my_llm))
ids = mem.smart_remember("User prefers Python over JavaScript")

Claude Code

# Option 1: Install from Claude Code plugin marketplace
claude plugin marketplace add flowerbear97/neuragram
claude plugin install engram

# Option 2: Manual MCP setup
pip install neuragram[mcp]
claude mcp add engram -- engram-mcp --db-path ./memory.db

# Option 3: With OpenAI embeddings for hybrid search
claude mcp add engram -- engram-mcp --db-path ./memory.db --embedding openai

Once installed, Claude Code automatically gains persistent memory across sessions with 6 tools: engram_remember, engram_recall, engram_smart_remember, engram_forget, engram_list, engram_stats.

MCP Server

engram-mcp --db-path ./memory.db
engram-mcp --db-path ./memory.db --embedding openai

REST API

engram-api --db-path ./memory.db --port 8080

LangChain

from engram.integrations.langchain import EngramMemory

memory = EngramMemory(db_path="./memory.db", user_id="u1")
memory.save_context({"input": "I prefer concise answers"}, {"output": "Got it!"})
result = memory.load_memory_variables({"input": "answer style"})

LlamaIndex

from engram.integrations.llamaindex import EngramChatMemory

memory = EngramChatMemory(db_path="./memory.db", user_id="u1")
memory.put("User is a Python developer", memory_type="fact")
results = memory.get("programming language")

Explainable Retrieval

for exp in mem.explain("user preferences", user_id="u1"):
    print(exp["summary"])
    # "vector rank #1 (+0.0082) | keyword rank #3 (+0.0048) | recency 0.95 (age 0.5d)"

Access Control

from engram import AccessPolicy, AccessLevel

policy = AccessPolicy(enabled=True, default_level=AccessLevel.NONE)
policy.grant("reader_agent", AccessLevel.READ)
policy.grant("writer_agent", AccessLevel.WRITE, namespace="project_a")
policy.grant("admin_bot", AccessLevel.ADMIN)

mem = AgentMemory(db_path="./memory.db", access_policy=policy)

Background Worker

worker = mem.create_worker(interval_seconds=3600)
await worker.start()
# ...
await worker.stop()

Installation

pip install neuragram              # core
pip install neuragram[openai]      # + OpenAI embeddings
pip install neuragram[local]       # + sentence-transformers
pip install neuragram[mcp]         # + MCP server
pip install neuragram[api]         # + REST API (FastAPI)
pip install neuragram[langchain]   # + LangChain adapter
pip install neuragram[llamaindex]  # + LlamaIndex adapter
pip install neuragram[telemetry]   # + OpenTelemetry
pip install neuragram[all]         # everything

Architecture

AgentMemory (client.py)
├── Store Layer          SQLite + sqlite-vec + FTS5
├── Retrieval Engine     RRF fusion, recency boost, deduplication
├── Processing           extraction → classification → conflict → merge
├── Lifecycle            decay, forgetting, background worker
├── Access Control       role-based, namespace-scoped
├── Telemetry            OpenTelemetry traces + metrics
└── Integrations         MCP Server, REST API, LangChain, LlamaIndex

License

Apache-2.0