defacto 0.0.2

An entity engine that turns operational events into temporal, queryable state

Defacto

An entity engine that turns operational events into temporal, queryable state.

You define your entities as state machines in YAML. Defacto handles ingestion, identity resolution, state computation, and temporal queries.

from defacto import Defacto

d = Defacto("definitions/")
d.ingest("app", events, process=True)

# current state
d.table("customer").execute()

# point-in-time
d.history("customer").as_of("2024-01-15").execute()

Status

Pre-alpha. The engine works, the API is stabilizing, documentation is in progress.

Getting started

Requires Python 3.12+ and a Rust toolchain.

git clone https://github.com/derek-yn-zhang/defacto.git
cd defacto
make setup
python examples/quickstart/main.py

See examples/quickstart/ for a minimal example and examples/showcase/ for multi-entity, multi-source, identity resolution, merges, and erasure.