Verity

A cognitive memory system for AI agents and applications — inspired by how the brain actually stores, recalls, and forgets.

What it does

AI memory systems treat memory as a database: store a string, retrieve a string. Verity treats memory as cognition. It uses a dual-speed store (fast episodic buffer + slow semantic store), runs a sleep consolidation cycle between sessions to decay, prune, and abstract memories, and applies reconsolidation rules that let memories update without drifting. The result is a memory system that behaves more like a mind than a key-value store.

Three things Verity does that no other package does: reconsolidation stability (memories update on access but cannot drift — a four-tier Bayesian system gates every modification), sleep consolidation (an offline decay → prune → abstract cycle that runs between sessions, mirrors the SO-spindle-ripple cascade), and tiered temporal weighting (the system auto-graduates from exponential to Bayesian renewal to Hawkes processes as event history grows, per-memory, without any configuration).

The API is seven methods. Zero configuration. No GPU. No cloud. No API key required. Runs on a Raspberry Pi and in a Kubernetes pod identically. Works with nothing but Python's stdlib, and gets progressively smarter as you add optional packages.

Install

pip install veritycog                    # stdlib only — text search
pip install "veritycog[cognitive]"       # + model2vec + hnswlib (recommended)
pip install "veritycog[connectors]"      # + dlt (60+ data sources)
pip install "veritycog[full]"            # everything

Quickstart

from verity import Memory

m = Memory()                                      # SQLite, zero config
m.add("I prefer dark mode")                       # store
m.add("Team standup every day at 9am")
m.add("The API uses JWT authentication")

results = m.search("daily schedule")              # retrieve
for r in results:
    print(r["content"], f"({r['confidence']:.0%} confidence)")

m.update(results[0]["id"], "standup moved to 10am")  # update
m.consolidate()                                   # sleep cycle
m.export()                                        # GDPR portability
m.delete(results[0]["id"])                        # GDPR erasure

The cognitive layer

Advanced: Engine API

Memory wraps the lower-level Engine API, which provides the full RELATE/NAVIGATE/GOVERN/REMEMBER loop with connectors, profiles, consent management, and a Merkle-chained audit trail. See examples/01_personal_notes.py for a complete walkthrough.

For AI agents

from verity import Memory

memory = Memory()

def agent_response(user_input: str) -> str:
    # Recall relevant context
    context = memory.search(user_input, k=5)
    context_str = "\n".join(r["content"] for r in context)

    # ... call your LLM with context_str ...

    # Remember the interaction
    memory.add(f"User asked: {user_input}")
    return response

License

Apache-2.0