The Coevolved Agent Development Framework is a flexible, atomic-first framework that gives software developers more control over AI agent construction. It is an efficient orchestration framework for building, debugging, managing, and deploying agent systems in production.

Installation

Install the coevolved package from PyPI:

pip install -U coevolved

Value Adds

• Atomic-first Architecture & Observability: Every operation is a Step, a composable unit with built-in input/output validation, automatic tracing, and execution metadata. Steps emit structured events (start, end, error) with configurable snapshot policies, giving you complete visibility into agent execution without manual instrumentation.

• Checkpointing: Built-in state persistence infrastructure enables failure recovery, human-in-the-loop workflows, and time-travel debugging. Resume from any checkpoint with full state lineage, making long-running agents reliable and debuggable.

• Composable Patterns: Express complex workflows using built-in composition primitives—sequential chains, parallel execution, fallback strategies, and retry logic with exponential backoff. Compose steps into agents without writing custom orchestration code.

• Budget Enforcement: Enforce limits on steps, LLM calls, tokens, cost, and execution time with UsagePolicy and UsageTracker. Get automatic warnings at configurable thresholds and prevent runaway costs in production deployments.

• Type-safe Validation: Optional Pydantic schemas provide runtime type validation where you need it, without forcing rigid type systems. Steps validate inputs and outputs automatically, catching errors early while remaining flexible.

Contributing

We welcome contributions from the community! Whether it's a feature request, bug report, documentation improvement, or code contribution, please read our

• Code Contribution Guidelines

Additional Resources

More documentation can be found at our docs.

Local Development

For developers who want to contribute or run Coevolved locally, we support a fast and reliable workflow powered by uv, an ultrafast Python package manager and virtual environment tool.

When you run uv sync, it automatically installs the coevolved package in editable mode, so your code changes are immediately available without reinstalling.

Detailed local development setup instructions, including dependencies, virtual environment creation, and workflow tips, are available here.