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/LangGraph 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
- PyPI CLI: arclith-cli
Installation
pip install arclith
Quickstart
Pour créer un projet concret avec la CLI, lancer API/MCP/probes, puis faire évoluer les adapters :
- Quickstart Arclith
- Quickstart agent Arclith from scratch
- Capacités standardisées
- CLI
- Release PyPI
- Sample fonctionnel
Pour poser uniquement le cœur métier minimal après création d'un projet :
arclith-cli init todo-list-service
cd todo-list-service
arclith-cli add-entity ShoppingItem
arclith-cli add-usecase PlanShoppingList
Ces commandes ne génèrent pas de CRUD ni de wiring adapter par défaut.
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[langgraph]"
pip install "arclith[opentelemetry]"
pip install "arclith[all]"
Pour ajouter LangGraph, LangSmith et OpenTelemetry à un projet généré:
uv add "arclith[langgraph]"
uv add "arclith[opentelemetry]"
arclith-cli add-adapter --capability agent --adapter langgraph
arclith-cli add-adapter --capability observability --adapter langsmith
arclith-cli add-adapter --capability observability --adapter opentelemetry
uv run langgraph dev --no-browser --allow-blocking --port 2024
Arclith génère langgraph.json, le point d'entrée LangGraph et le câblage Arclith.langgraph(...).
Le code spécifique du projet reste dans src/<package>/adapters/inbound/langgraph/agent.py.
LangSmith et OpenTelemetry sont ajoutés dans observability.enabled et peuvent être actifs en
parallèle.
Development
uv sync
uv run pytest
License
Apache 2.0 — see LICENSE.
1 maintainer
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