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Default path: zero API calls at index time. Zero infra. Zero lock-in. A knowledge graph + MCP tool server for LLM agents, with hybrid retrieval, CDC-based live database sync, and Korean FTS built in.
Knowledge graph + MCP tool server for LLM agents with hybrid retrieval, live DB sync, Korean FTS, and memory feedback.
pip install "synaptic-memory[sqlite,korean,vector]"
synaptic-quickstart --db quickstart.db
That command builds a tiny SQLite-backed graph and runs three searches — all
without calling any LLM at indexing time. Omit --db for an in-memory,
zero-dependency smoke test. Full source for the expanded example:
examples/quickstart.py.
Plain RAG usually answers from independent chunks. Synaptic builds a graph first, so an agent can search, follow relations, inspect structured rows, and remember which evidence helped.
It is not a vector database replacement. It is the graph and tool layer around your existing documents, SQL data, embedding endpoint, and agent runtime.
import asyncio
from synaptic import SynapticGraph
async def main():
# Any data → knowledge graph (CSV, JSONL, directory)
graph = await SynapticGraph.from_data("./my_data/", preset="rag")
try:
result = await graph.search("my question")
print(result.nodes[0].node.title if result.nodes else "no result")
finally:
await graph.close()
asyncio.run(main())
That's it. Auto-detects file format or DB schema, generates an ontology profile, ingests, indexes, builds FK edges.
Presets keep the common knobs compact:
# local: deterministic, no external services (default)
graph = await SynapticGraph.from_chunks(chunks, preset="local")
# rag: reads SYNAPTIC_EMBED_URL / SYNAPTIC_RERANK_URL if set
graph = await SynapticGraph.from_data("./docs/", preset="rag")
# agent: rag + deterministic component bridging for multi-turn exploration
graph = await SynapticGraph.from_data("./docs/", preset="agent")
Live database sync (CDC) —
mode="cdc"enables incremental updates: tables with anupdated_at-style column are read with a watermark filter, others fall back to per-row content hashing. Deletes are detected via a TEMP TABLE LEFT JOIN; FK rewires re-link the corresponding RELATED edges. Search results are identical to a full reload (locked in by a regression test). Supports SQLite, PostgreSQL, MySQL/MariaDB.
Office files (PDF/DOCX/PPTX/XLSX/HWP) are supported through the optional
xgen-doc2chunkpackage. Install withpip install synaptic-memory[docs]or usefrom_chunks()with your own parser.
Your data (CSV, JSONL, PDF/DOCX/PPTX/XLSX/HWP, SQL database)
↓ auto-detect format / auto-discover DB schema + FKs
↓ DocumentIngester (text) / TableIngester / DbIngester
↓
Knowledge Graph
├─ Documents: Category → Document → Chunk
└─ Structured: table rows as ENTITY nodes + RELATED edges (FKs)
↓
MCP tools → LLM agent explores via graph-aware multi-turn tool use
Two jobs, nothing else:
# Recommended local graph + MCP setup
pip install "synaptic-memory[sqlite,korean,vector,mcp]"
# Team / production graph on PostgreSQL + pgvector
pip install "synaptic-memory[postgresql,embedding,reranker]"
# Scale-out helpers: Kuzu graph + Qdrant vector + MinIO blob storage
pip install "synaptic-memory[scale]"
# Add this for the LangChain retriever example
pip install "synaptic-memory[langchain]"
# Or everything, including Postgres / Kuzu / Qdrant / MinIO
pip install "synaptic-memory[all]"
pip install synaptic-memory # Core (zero deps, in-memory only)
pip install synaptic-memory[sqlite] # + SQLite FTS5 backend
pip install synaptic-memory[korean] # + Kiwi morphological analyzer
pip install synaptic-memory[vector] # + usearch HNSW index
pip install synaptic-memory[mcp] # + MCP server for Claude
pip install synaptic-memory[embedding] # + aiohttp for embedding APIs
pip install synaptic-memory[reranker] # + flashrank cross-encoder
pip install synaptic-memory[langchain] # + LangChain retriever adapter
pip install synaptic-memory[postgresql] # + asyncpg + pgvector
pip install synaptic-memory[mysql] # + aiomysql DB ingest
pip install synaptic-memory[oracle] # + oracledb DB ingest
pip install synaptic-memory[mssql] # + aioodbc DB ingest
pip install synaptic-memory[kuzu] # + embedded property graph backend
pip install synaptic-memory[qdrant] # + Qdrant vector helper
pip install synaptic-memory[minio] # + MinIO/S3-compatible blob helper
pip install synaptic-memory[scale] # + Kuzu + Qdrant + MinIO + aiohttp
pip install synaptic-memory[docs] # + xgen-doc2chunk (PDF/DOCX/PPTX/XLSX/HWP)
The default one-liner creates a local SQLite graph. For existing
infrastructure, create the backend yourself, connect it, and pass it to
from_data(), from_chunks(), or from_database().
from synaptic import SynapticGraph
from synaptic.backends.postgresql import PostgreSQLBackend
backend = PostgreSQLBackend("postgresql://user:pass@host:5432/synaptic")
await backend.connect()
graph = await SynapticGraph.from_data("./docs/", backend=backend, preset="rag")
Current backend roles:
Qdrant and MinIO are helper services, not full graph stores. Use them through
CompositeBackend: graph storage keeps nodes/edges, Qdrant handles ANN vector
search, and MinIO/S3-compatible storage offloads large Node.content.
from synaptic.backends.composite import CompositeBackend
from synaptic.backends.kuzu import KuzuBackend
from synaptic.backends.minio_store import MinIOBackend
from synaptic.backends.qdrant import QdrantBackend
backend = CompositeBackend(
KuzuBackend("synaptic.kuzu"),
vector=QdrantBackend("http://localhost:6333", collection="synaptic"),
blob=MinIOBackend("localhost:9000", bucket="synaptic"),
)
await backend.connect()
graph = await SynapticGraph.from_data("./docs/", backend=backend, preset="scale")
The library gives you the backend contracts and the retrieval layer. For multi-terabyte production corpora, plan the surrounding operating layer too: durable ingestion queues, parser/OCR workers, external lexical indexes, tenant/ACL filters, index-lag monitoring, and backup/restore for each store.
import asyncio
from synaptic import SynapticGraph
async def main():
# CSV file
graph = await SynapticGraph.from_data("products.csv")
try:
result = await graph.search("my question")
for activated in result.nodes[:5]:
print(activated.node.title, activated.activation)
finally:
await graph.close()
asyncio.run(main())
You can pass preset="rag" to read SYNAPTIC_EMBED_URL and
SYNAPTIC_RERANK_URL, or use GraphBuildOptions when you want one reusable
configuration object across from_data(), from_chunks(), and
from_database().
synaptic-mcp --db my_graph.db
synaptic-mcp --db my_graph.db --embed-url http://localhost:11434/v1
Claude can now call MCP tools to explore your graph — search, ingest new files into the graph mid-conversation, and sync from a live database without dropping to a CLI.
A ready-to-paste claude_desktop_config.json snippet is in
examples/mcp_claude_desktop.json.
pip install "synaptic-memory[sqlite,korean,vector,langchain]"
import asyncio
from synaptic import SynapticGraph
from synaptic.integrations.langchain import SynapticRetriever
async def main():
graph = await SynapticGraph.from_data("./docs/")
try:
retriever = SynapticRetriever(graph=graph, k=5)
docs = await retriever.ainvoke("my question")
for doc in docs:
print(doc.page_content[:80], " ", doc.metadata["score"])
finally:
await graph.close()
asyncio.run(main())
Runnable example: examples/langchain_retriever.py.
Each hit becomes a LangChain Document with the node id, title,
score, and any structured properties in metadata — works unmodified
in RetrievalQA chains, agents, and RAG graphs.
import asyncio
from synaptic.backends.sqlite_graph import SqliteGraphBackend
from synaptic.extensions.domain_profile import DomainProfile
from synaptic.extensions.document_ingester import DocumentIngester, JsonlDocumentSource
async def main():
profile = DomainProfile.load("my_profile.toml")
backend = SqliteGraphBackend("graph.db")
await backend.connect()
source = JsonlDocumentSource("docs.jsonl", "chunks.jsonl")
ingester = DocumentIngester(profile=profile, backend=backend)
await ingester.ingest(source)
asyncio.run(main())
When your documents cite each other by a canonical identifier — statute
article numbers, standard clause codes, manual section ids — Synaptic
turns those citations into REFERENCES graph edges so the agent can
follow them. Still zero LLM at index time — it is rule-based
extraction, auto-derived from your corpus's own identifier values.
from synaptic import SynapticGraph
from synaptic.extensions.domain_profile import DomainProfile
# Each document carries its identifier in an `article_no` property,
# scoped by `law`. That is all the configuration needed.
graph = await SynapticGraph.from_data(
"./statutes.jsonl",
profile=DomainProfile.with_references(
key_property="article_no", scope_property="law"
),
)
The linker is self-gating: if the corpus has no clean identifier
inventory it writes nothing (no-op), so this is safe to leave on.
Measured impact — on a financial-statute multi-hop corpus, retrieval
goes from 32% (standard dense RAG) / 31% (HippoRAG2) to
73% (synaptic) — 2.3× the nearest competitor:
docs/REPORT-rag-vs-synaptic.md.
Requirement: each document must carry the identifier as a node property. Structured input (JSONL with
properties) provides it directly; raw text files do not — relation linking needs identifiers.
By default, indexing is LLM-free. The graph is a search index, not a knowledge base.
Cross-references that documents state explicitly (statute article
citations, clause codes) are turned into REFERENCES edges with
zero LLM (see Option D).
If you opt into OpenIE, Synaptic can add bounded, revertible
LLM-extracted semantic relations; that is not part of the default
deterministic path.
Current API:
graph.search()has one retrieval path: the hybrid EvidenceSearch pipeline (BM25 + HNSW + PPR + cross-encoder + MMR). The oldengine=switch was removed, so examples should callgraph.search("question")directly.
All four structured tools emit hints on 0-result returns (alternate
operator, dropped WHERE, fuzzy column match) so the agent's next turn
gets a concrete corrective action instead of a retry loop.
Mid-conversation ingestion so Claude can teach itself new material without leaving the chat.
All tools return { data, hints, session }. The SearchSession tracks seen nodes across turns so the agent never re-reads the same chunk.
Query
↓ Kiwi morphological analysis (Korean) or regex (other)
↓ BM25 FTS + title 3x boost + substring fallback
↓ Vector search (usearch HNSW, optional)
↓ Vector PRF (pseudo relevance feedback, 2-pass)
↓ PPR graph discovery (personalized pagerank)
↓ GraphExpander (1-hop: category siblings, chunk-next, entity mentions)
↓ HybridReranker (lexical + semantic + graph + structural + memory + authority + temporal)
↓ MaxP document aggregation (coverage bonus)
↓ Cross-encoder reranker (bge-reranker-v2-m3 via TEI, optional)
↓ EvidenceAggregator (MMR diversity + per-doc cap + category coverage)
Result
Usage/time memory axis (opt-in, off by default). The reranker carries a
fifth weighted signal — memory — that scores each node by how it has been
used: importance (reinforced successes vs failures), recency (updated_at),
and vitality. With memory=0.0 (the default) ranking is unchanged. Turn it on
and retrieval evolves — reinforcing the results that answered a query lifts
them on later searches, and decayed nodes fade, which a static index cannot do.
from synaptic.extensions.hybrid_reranker import RerankerWeights
# Enable the memory axis (rebalance the others so weights still sum to ~1).
graph.reranker_weights = RerankerWeights(
lexical=0.35, semantic=0.20, graph=0.10, structural=0.10, memory=0.25,
)
await graph.reinforce([node_id], success=True) # this result helped → lift it next time
Retrieval can be observed without making every search stateful:
from synaptic import FeedbackSignal, MemoryScope
scope = MemoryScope(workspace_id="docs", user_id="alice")
result = await graph.search("refund exception", record=True, scope=scope)
await graph.record_feedback(
event_id=result.event_id,
signal=FeedbackSignal.EXPLICIT_POSITIVE,
success=True,
scope=scope,
)
health = await graph.memory_health(scope=scope)
signals = await graph.scan_memory_signals(scope=scope)
Events, feedback, provenance, and health signals are stored as graph metadata.
They are not appended to Node.content, and they are not automatically dumped
into LLM prompts.
The root README stays current with the install path and public API. Detailed numbers are versioned in reports so old measurements do not look like the current API contract.
Run a quick local smoke:
synaptic-quickstart --json
Run the lightweight Korean FTS benchmark:
pip install "synaptic-memory[korean]"
python examples/benchmark_allganize.py
Run the competitor harness when optional packages/API keys are available:
python examples/benchmark_vs_competitors/run_comparison.py --only synaptic
Reference reports:
SynapticGraph.from_data("./data/") ← Easy API
↓
Auto-detect → DomainProfile → Ingest → Index
↓
StorageBackend (Protocol)
├── MemoryBackend (testing)
├── SqliteGraphBackend (recommended, FTS5 + HNSW)
├── KuzuBackend (embedded Cypher)
├── PostgreSQLBackend (pgvector)
└── CompositeBackend (mix backends)
↓
Retrieval pipeline (BM25 + vector + PRF + PPR + reranker + MMR)
↓
Agent tools → MCP server → LLM agent
uv sync --extra dev --extra sqlite --extra mcp
uv run pytest tests/ -q
uv run ruff check --fix
Apache-2.0 — see LICENSE. Permits commercial use, modification, and redistribution as long as the copyright/attribution notice is preserved.
Knowledge graph + MCP tool server for LLM agents with hybrid retrieval, live DB sync, Korean FTS, and memory feedback.
เครื่องมือ
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FAQ
คัดลอกคอนฟิก stdio สำหรับ Cursor, Claude Desktop, Claude Code หรือ VS Code ได้ในหน้านี้ คอนฟิกนี้ใช้การติดตั้งของผู้เผยแพร่ ไม่ใช่พร็อกซีของ PlugMCP
ระเบียนนี้ไม่ได้ระบุตัวแปรสภาพแวดล้อมที่จำเป็น
Synaptic Memory ทำงานแบบโลคัลผ่าน stdio
ตรวจสอบล่าสุดเมื่อ 2026-10-28 Knowledge graph + MCP tool server for LLM agents with hybrid retrieval, live DB sync, Korean FTS, and memory feedback.
