A single-file cognitive container — vectors, indexes, learning state, and a cryptographic audit trail in one .rvf. Self-learning search improves up to 36% from feedback alone, with no manual tuning. Runs in Node, the browser, edge runtimes, and offline.

Why AgentDB?

Most vector databases store embeddings and call it done. AgentDB watches which results your agent actually used, learns from that signal, and ranks the next query better. The bandit underneath also picks the right RL algorithm, the right compression tier, and the right pattern weighting on its own — so the database itself gets sharper while you focus on the agent.

The name: a database that thinks like an agent — episodic memory, skill library, causal reasoning, and a learning loop, all in one file. Built by rUv on the ruvector Rust engine.

What AgentDB Does

Self-Learning Vector Memory

Agent ──► AgentDB (.rvf) ──► HNSW search ──► top-k results
   │                                              │
   ▼                                              ▼
recordFeedback(id, reward)  ◄──  agent uses some, ignores rest
   │
   ▼
Bandit re-tunes ranking / RL choice / compression  ──► next query is smarter

3 lines to self-learning search:

const backend = await SelfLearningRvfBackend.create({ learning: true, storagePath: "./my.rvf" });
const results = await backend.searchAsync(query, 10);   // search
backend.recordFeedback(results[0].id, 0.9);             // learn — next search is smarter

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Quick Start

There are three ways to use AgentDB depending on what you're building. Pick whichever matches your stack:

	npm library	CLI	MCP server
What you get	TypeScript / JS API for any Node app	agentdb binary, scriptable from any shell	41 tools callable from Claude Code, Cursor, Cline, etc.
Install	npm i agentdb	npx agentdb … (no install)	claude mcp add agentdb -- npx agentdb mcp start
Best for	Embedding the engine in your own code	Quick experiments, CI scripts, ad-hoc memory	Plugging memory + learning into an LLM agent

Path A — npm library

npm install agentdb

import { SelfLearningRvfBackend } from 'agentdb';

const db = await SelfLearningRvfBackend.create({
  learning: true,
  storagePath: './memory.rvf',
});

await db.insertAsync('doc1', new Float32Array(384), { text: 'Hello world' });
const hits = await db.searchAsync(queryEmbedding, 5);
db.recordFeedback(hits[0].id, 1.0);  // it was useful — db gets smarter

Path B — CLI in 10 seconds

# Try it without installing
npx agentdb init my-memory.rvf
npx agentdb add my-memory.rvf "vector memory that learns"
npx agentdb search my-memory.rvf "self-improving search" --top-k 5

Path C — MCP server (Claude Code, Cursor, etc.)

claude mcp add agentdb -- npx agentdb@latest mcp start

That registers 41 MCP tools — agentdb_pattern_store, agentdb_pattern_search, agentdb_hierarchical_store, agentdb_causal_edge, agentdb_skill_library, agentdb_reflexion, etc. They call the same engine the npm library does, just over Claude's tool-calling surface.

---

What You Get

Capability	Description
🧠 Self-Learning Search	Up to +36% search quality from feedback alone — Thompson Sampling bandit re-tunes ranking, RL choice, and compression tier with zero manual config
🐝 Cognitive Memory	6 human-inspired patterns — episodic replay (Reflexion), skill library, causal reasoning, hierarchical context, semantic clustering, working memory
🤖 9 RL Algorithms	Q-Learning, SARSA, DQN, PPO, Actor-Critic, Policy Gradient, Decision Transformer, MCTS, Model-Based RL — bandit picks the right one per task
⚡ 150× faster than SQLite	RuVector Rust engine via NAPI bindings; HNSW vector search; sub-millisecond reads on 100k+ vectors
🔍 Hybrid Search	BM25 keyword + dense vector fused with Reciprocal Rank Fusion — exact terms and semantic intent in one query
🕸️ Graph Intelligence	Cypher queries, causal edges, GNN 8-head attention (+12.4% recall), hyperedges for n-ary relationships
💾 Single-file Storage	Everything (vectors, indexes, learning state, audit log) in one .rvf "Cognitive Container" — no servers, no API keys, no monthly bills
🎯 Quantization	4-32× memory reduction with PQ8 / PQ4 / binary quantization; minimal recall loss; runs on commodity hardware
🔌 41 MCP Tools	First-class Claude Code / Cursor / Cline integration — pattern store, search, skill library, reflexion, causal edges, hierarchical recall, delete
🌐 Runs Anywhere	Node, browser (WASM), edge runtimes, fully offline — same API, same .rvf file
🛡️ Enterprise Security	JWT auth, API key rotation, Argon2id hashing, SOC2 / GDPR audit trails, cryptographic witness chain
🔗 agentic-flow Integration	Drop-in for agentic-flow — backs ReasoningBank, MemoryController, NightlyLearner, and 30+ agents

---

🧠 Self-Learning Loop

Most retrieval systems are read-only. AgentDB closes the loop:

search ──► top-k ──► agent picks the useful ones ──► recordFeedback()
                                                            │
                                                            ▼
                                              Thompson Sampling bandit
                                                            │
                                                            ▼
                       re-weights ranking · re-picks RL algorithm · re-tunes compression
                                                            │
                                                            ▼
                                                   next search is sharper

The bandit isn't a gimmick — it's used at four decision points:

1. Pattern ranking — which historical pattern matches this new query best?
2. RL algorithm selection — Q-Learning for tabular tasks, PPO for continuous control, MCTS for planning, etc.
3. Compression tier — full precision when accuracy matters, PQ4 when memory does.
4. Skill composition — chain skill A→B→C or skill A→D→E?

Each decision logs reward over time. Bad arms decay fast. Good arms stick.

---

⚡ Performance

Metric	AgentDB	Baseline	Source
Vector search (100k vectors)	<1 ms	~150 ms (SQLite + cosine loop)	benchmarks/hnsw/
HNSW query (1M vectors)	2–5 ms	~100 ms (brute force)	benchmarks/vector-search/
Bulk insert (10k vectors)	<100 ms	~12 s (sql.js)	benchmarks/database/
Memory footprint (1M × 384d)	~96 MB (PQ8)	~1.5 GB (raw f32)	benchmarks/quantization/
Self-learning quality lift	+36%	n/a	benchmarks/ruvector-performance.test.ts
GNN attention recall	+12.4%	baseline HNSW	benchmarks/attention-performance.ts

Run them yourself: npm run bench from this repo.

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🔌 MCP Integration

41 tools across six families, all callable from Claude Code, Cursor, Cline, or any MCP-compatible client:

Pattern Store / Search (8 tools)

Tool	Purpose
agentdb_pattern_store	Store a successful pattern with embedding + metadata
agentdb_pattern_search	Semantic search for similar past patterns
agentdb_pattern_stats	Retrieval stats, cache hits, hit-rate trends
agentdb_pattern_delete	Remove a pattern by id
agentdb_batch_insert	Bulk insert many patterns at once
agentdb_batch_search	Parallel multi-query search
agentdb_export	Dump patterns to JSON / CSV
agentdb_import	Load patterns from JSON / CSV

Hierarchical / Causal Memory (10 tools)

Tool	Purpose
agentdb_hierarchical_store	Tier-aware memory store (working / short / long)
agentdb_hierarchical_recall	Tier-filtered retrieval
agentdb_hierarchical_delete	Remove hierarchical entry by key
agentdb_causal_edge	Add a causal relationship between memories
agentdb_causal_edge_delete	Remove a causal edge by id
agentdb_causal_node_delete	Cascade-delete a node + incident edges
agentdb_edges_by_endpoints	Bulk-delete edges by (from, to, label)
agentdb_causal_query	Cypher-like graph queries
agentdb_causal_explain	Explain why two memories are connected
agentdb_attestation_log	Cryptographic audit trail

Reflexion + Skill Library (12 tools)

Tool	Purpose
agentdb_reflexion_store	Store an episode (task + outcome + critique)
agentdb_reflexion_recall	Retrieve relevant past episodes
agentdb_reflexion_delete	Remove an episode
agentdb_reflexion_rebuild	Re-hydrate vector index from durable SQL
agentdb_skill_create	Create a reusable skill from a pattern
agentdb_skill_compose	Chain skills A→B→C with bandit-picked composition
agentdb_skill_search	Find skills by intent embedding
agentdb_critique_summary	Summarize lessons from past failures
agentdb_success_strategies	Surface what worked across past episodes
agentdb_task_stats	Per-task win-rate, latency, reward trends
agentdb_prune	TTL + quality-based episode pruning
agentdb_warm_cache	Pre-populate query cache for a session

Learning + Routing (11 tools)

Tool	Purpose
agentdb_learning_route	Route a task to the right RL algorithm
agentdb_learning_train	Train a specific RL agent on episodes
agentdb_learning_predict	Get an action prediction for a state
agentdb_bandit_update	Update bandit reward for an arm
agentdb_bandit_pick	Sample the best arm under Thompson Sampling
agentdb_consolidate	Run NightlyLearner consolidation pipeline
agentdb_compose	Combine memory patterns into a strategy
agentdb_synthesize	Build a context window from related memories
agentdb_explain_recall	Feature-attributed retrieval results
agentdb_diversity_rank	MMR-rerank for diverse top-k
agentdb_metadata_filter	Filtered semantic search

---

🔗 Used By

AgentDB powers the memory + learning layer in:

Project	What it uses AgentDB for
agentic-flow	ReasoningBank backend, ReflexionMemory, NightlyLearner consolidation, 30+ agent memory namespaces
ruflo	Plugin marketplace memory, agent federation audit log, hierarchical recall for /adr-index, swarm coordination patterns
@ruvector	Reference downstream for the Rust engine — every release is verified against AgentDB's test suite

If you ship something on top of AgentDB, open an issue and we'll add you.

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🐳 Docker / Edge / Browser

AgentDB compiles to four targets from one source:

Target	What	When
Node native	NAPI bindings (Linux, macOS, Windows; x64 + arm64)	Backend services, CLI, MCP server
Node WASM fallback	sql.js + WASM engine	Restricted hosts that can't run NAPI
Browser	Pure WASM bundle	Offline-first apps, edge functions, IDE extensions
Docker	docker-compose.yml in docker/	Local dev, CI, prod deploy

# Browser
import { createBrowserDb } from 'agentdb/browser';

# Docker
docker compose -f docker/docker-compose.yml up

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Documentation

Doc	When to read it
Full README (deep)	Every feature, every API, every option — the complete reference (2,900+ lines)
PUBLISHING.md	npm publish flow, dist-tag policy, release verification
ADR-071	WASM integration design
ADR-072	RuVector advanced-feature integration
Examples	End-to-end runnable scripts — RAG chatbot, code-review agent, RL training, edge deploy
Benchmarks	Reproducible perf harness — HNSW, attention, quantization, RL, end-to-end

---

Repository

📦 npm	agentdb
🌐 Source	https://github.com/ruvnet/agentdb
🐛 Issues	https://github.com/ruvnet/agentdb/issues
🎨 Marketing site	ui/ (Vite + React + shadcn/ui)
🧬 Engine	@ruvector (Rust + NAPI)
🔗 Reference consumer	agentic-flow (uses this as a git submodule at packages/agentdb/)

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Support

Resource	Link
Documentation	docs/README-full.md
Issues & Bugs	GitHub Issues
Enterprise	ruv.io
Community	Agentics Foundation Discord
Engine	ruvector
Powered by	Cognitum.one

License

MIT OR Apache-2.0 — RuvNet