LoopX

Exo is an AI agent harness for recursive self-improvement, providing tools, tasks, integrations, and a layered architecture that separates executive policy, protected state, and sandbox execution. It can inspect its own code and runtime logs, incrementally modify prompts, memory, tools, and harness policy, clone itself, and manage a lineage of clones. An event log remains outside these modifications as a canonical record intended to prevent recursive loops.

AX is Google's open agentic orchestration runtime for declaring and running autonomous agent workloads in Kubernetes clusters. It defines Tasks, Workspaces, Gateways, and Models as ax.io/v1alpha1 manifests: Tasks run agent code in isolated sandboxes, Workspaces preconfigure Git repositories, MCP servers, and skill packages, Gateways restrict outbound traffic with host allowlists, and Models configure the platform's LLM access through Kubernetes secrets. The control plane runs on Agent Substrate and is operated through a kubectl-shaped CLI that applies manifests, watches task status, opens SSH sessions into sandboxes, and suspends or resumes checkpointed agents. AX is described as being designed for high-throughput cluster operation and is still subject to breaking changes before a stable release. It is distributed under the Apache License 2.0.

AgentLoop is a developer tool that runs unattended coding loops on a user's machine, executing plans authored in ChatGPT by launching Codex-based workers and independent critic processes. It automates iterative code generation and evaluation until configured quality standards are met.

OpenBot is an open-source AI agent platform from CopilotKit that gives each agent its own computer with a browser, logins, files, tools, and a dedicated interaction channel. It runs in the user's infrastructure and accepts agents that speak the AG-UI protocol, including agents built with LangGraph, Mastra, CrewAI, Pydantic AI, Google ADK, or custom code. A single gateway mediates actions involving the computer, files, MCP servers, and UI components: it decides whether an action is permitted before execution and records it afterward. Agents can operate their own browser screen, hand control to a human for restricted actions, and return component-based responses. Docker Compose runs the application components and PostgreSQL, while the administrator supplies the model credentials; the repository describes the project as alpha software under active development.

loop.js is a TypeScript framework and CLI for loop engineering: it runs an agent against a declared goal and verification criterion until a separate, skeptical Verify agent judges the work complete. Each round starts with fresh context and reads state and handoff notes from disk; the worker agent cannot approve its own work, and a failed verification supplies a reason for the next round. The framework provides round, spending, and per-round timeout guards; typed exits; crash recovery; idempotent resumption from a stored cursor; and a compare-and-set lock with heartbeat to prevent overlapping live runs and take over dead ones. It can run from a terminal, be embedded in a product, or be scheduled through crontab, launchd, Task Scheduler, or Modal's cloud.