Arclith

Python 3.13 framework for building microservices with Hexagonal Architecture and Clean Architecture.

Arclith provides reusable domain models, use cases, repositories, adapters, FastAPI/FastMCP bootstrap, configuration, probes, and service wiring.

Canonical Service Layout

Arclith applications should use a namespaced src/<package>/... layout. This keeps imports explicit, avoids top-level package collisions, and matches how the project is built and tested.

src/my_service/
  domain/
  application/
  adapters/
  infrastructure/
config/
tests/
main.py

The current convention is exposed by the framework:

from arclith import canonical_project_layout

layout = canonical_project_layout("my_service")
print(layout.domain)  # src/my_service/domain

Project Links

Repository: karned-rekipe/arclith
Functional sample: karned-rekipe/_sample
GitHub Project: Arclith backlog
Issues: Arclith issues
PyPI: arclith

Installation

pip install arclith

Quickstart

Pour creer un projet concret avec la CLI, lancer API/MCP/probes, puis faire evoluer les adapters:

Optional dependencies

pip install "arclith[mongodb]"
pip install "arclith[duckdb]"
pip install "arclith[mariadb]"
pip install "arclith[fastapi]"
pip install "arclith[mcp]"
pip install "arclith[all]"

Development

uv sync
uv run pytest

License

Apache 2.0 — see LICENSE.

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