krons

Spec-based composable framework for building type-safe systems.

Installation

pip install krons

Features

• Spec/Operable: Type-safe field definitions with validation, defaults, and DB metadata
• Node: Polymorphic content containers with DB serialization
• Services: Unified service interfaces (iModel) with hooks and rate limiting
• Enforcement: Policy evaluation and action handlers with typed I/O
• Protocols: Runtime-checkable protocols with @implements decorator

Quick Start

from krons.specs import Spec, Operable

# Define specs
name_spec = Spec(str, name="name")
count_spec = Spec(int, name="count", default=0, ge=0)

# Compose into structure
operable = Operable([name_spec, count_spec])
MyModel = operable.compose_structure("MyModel")

Requirements

• Python 3.11+
• pydantic 2.x
• anyio
• httpx
• orjson

License

Apache-2.0