doxastica 0.2.0

Graph-native AGM belief-revision core (Kumiho M0)

doxastica

A standalone reference implementation of Kumiho (arXiv 2603.17244, Young Bin Park) — a graph-native AGM belief-revision core — with one deliberate multi-scope extension (Kumiho is single-agent) and one deliberate exclusion (no recovery; AGM recovery is dropped in favour of superseded-chain semantics). Zero narrative concepts; correctness is provable, with AGM/Hansson postulates verified mechanically as a backend conformance suite.

What it is

doxastica is a standalone, append-only belief-revision library. It has no game, narrative, or LLM concepts inside it — only scopes, beliefs, and revisions behind a clean BeliefStore protocol. Revision is forward-only: no operation removes or rewrites a stored BeliefState; superseded states stay on the chain. The library ships a working in-memory AGM core that depends on pydantic alone, with the LadybugDB graph backend available as an optional extra.

Installation

# Core (in-memory AGM engine, pydantic only)
pip install doxastica

# With the LadybugDB reference backend
pip install doxastica[ladybug]

Or with uv:

uv add doxastica
uv add 'doxastica[ladybug]'

The base install ships a fully working in-memory belief-revision core. The [ladybug] extra adds the LadybugDB-backed reference backend behind the same BeliefStore protocol.

Quick Start

See the Quick Start in the documentation for a runnable first program using MemoryCore(InMemoryBackend()).

License

MIT. See LICENSE.