State Machine Python Packages

transitions

A lightweight, object-oriented finite state machine implementation in Python with many extensions

python-statemachine

Expressive statecharts and FSMs for modern Python.

django-fsm

Django friendly finite state machine support

burr

Build applications that make decisions (chatbots, agents, simulations, etc...). Monitor, trace, persist, and execute on your own infrastructure.

apache-burr

Build applications that make decisions (chatbots, agents, simulations, etc...). Monitor, trace, persist, and execute on your own infrastructure.

besser

A Python-based AI-enhanced low-code open-source platform for smart software development

mklang

A declarative language for LLM-driven state machines - the .mkl document is the program, an LLM is the runtime

hipcortex

Deterministic cognitive state substrate & world model runtime for autonomous agents. Features transactional belief updates, hybrid RK4 rollouts, and 3-tier experience consolidation via MCP & REST.

fsmpy

:arrows_counterclockwise: Minimal State Machine

zoo-framework

In-process task orchestration for Python: scheduled, observable, stateful — no broker, no cron daemon.

context-compiler

Deterministic state engine for managing conversation state and constraints in LLM applications.

sqlalchemy-fsm

SQLAlchemy finite state machine support

stratum-mcp

State machine dispatch server for AI agent workflows. Typed YAML specs, MCP server (stratum-mcp), and Python library (stratum-py) — postconditions, retries, gates, and auditable execution traces for Claude Code and Codex.

miros

Python statecharts

msri

Rust e2e testing framework — test scenarios as directed graphs of filesystem states

integration-automation-patterns

Enterprise integration patterns: idempotent event processing, saga orchestration, transactional outbox, and webhook validation for reliable system-of-record sync

django-river

Django workflow library that supports on the fly changes ⛵

patitas

ฅᨐฅ Patitas — CommonMark Markdown parser for Python 3.14+ with typed AST and free-threading

avtomatika

High-performance state-machine based orchestrator for managing complex AI agents and asynchronous workflows. Separates process logic (Blueprints) from execution (Workers).

pylstar

An implementation of the LSTAR Grammatical Inference Algorithm

ain-state-compiler

AIN State Compiler is a local-first enterprise AI state compiler that continuously transforms Slack, Jira, and Gmail logs into executable, conflict-resolved operational state. Built with Python and SQLite.

farrier

Your agent loop dies at 3am. stablemate's doesn't. Durable, unattended runs for Claude, Codex, Copilot, Cline and OpenCode.

fpf-thinking-map

Small MIT-licensed runtime for bounded LLM traversal, inspired by FPF and focused on practical agent behavior. ISO/IEC 25010 · 27001 · ISO 9001 aligned evidence (not certified).

rosettes

⌾⌾⌾ Rosettes — ReDoS-safe syntax highlighter for Python 3.14+ with free-threading.