Fractal is an open-source agent orchestration harness and plugin framework developed by Plasma AI. Designed to coordinate coding workflows and agent execution across environments, Fractal provides modular integration layers, shims, and skills tailored for AI coding ecosystems. In daily use, Fractal acts as an intermediary harness that bridges AI agents with local runtime environments, toolsets, and contextual repositories. It includes native integration plugins for platforms such as Claude Code and OpenAI Codex environments, allowing developers to execute structured tasks, manage tool shims, and coordinate context caching and documentation pipelines directly from the terminal. Fractal distinguishes itself through its explicit multi-agent plugin architecture, including support for dedicated agent extensions (.claude-plugin and .codex-plugin structures) and lightweight environment shims. This design allows development teams to run standardized developer workflows, manage cache-derived repository knowledge, and orchestrate scripted tool executions across multiple AI client backends. Fractal is distributed as an open-source project hosted on GitHub under the Plasma AI organization, allowing developers to inspect, modify, and integrate the harness directly into their custom automation pipelines.
Tags: agent harness, AI, ai agent, cli, developer tools, OpenSource