Executors & Harnesses | exo docs

The built-in executor runtimes, from basic to Codex, Claude Code, and Cursor.

Executors & Harnesses | exo docs Skip to content Menu Return to top Executors & Harnesses ​ A harness is an executor running on the exoharness. The exo CLI selects one with --harness : Harness What it is basic Built-in Rust executor: straightforward prompt → model → tools loop rlm Recursive-language-model experiment typescript Runs a TypeScript harness module that owns the turn loop, while Rust owns durable state codex Backs OpenAI Codex with durable exoharness sessions claude-code Backs Claude Code with durable exoharness sessions cursor Backs the Cursor SDK with durable exoharness sessions <

saved by

• Maanav Khaitan
• SUJASH AGRAWAL

related reading

• Data Model | exo docsexoharness.ai
• Hermes Agent — The Agent That Grows With Youhermes-agent.nousresearch.com
• exoharnessexoharness.ai
• Parsed | Custom, interpretable AI systems that continuously learnparsed.com
• Welcome to Learn Harness Engineeringwalkinglabs.github.io
• Agentationagentation.dev
• Claude Code Cheat Sheetcc.storyfox.cz
• GitHub - x1xhlol/system-prompts-and-models-of-ai-tools: FULL Augment Code, Claude Code, Cluely, CodeBuddy, Comet, Cursor, Devin AI, Junie, Kiro, Leap.new, Lovable, Manus, NotionAI, Orchids.app, Perplexity, Poke, Qoder, Replit, Same.dev, Trae, Traycer AI, VSCode Agent, Warp.dev, Windsurf, Xcode, Z.ai Code, Dia & v0. (And other Open Sourced) System Prompts, Internal Tools & AI Modelsgithub.com
• Cookbookcookbook.openai.com
• LangChain: the open agent platform to own your intelligencelangchain.com
• Agentationagentation.com
• GitHub - shareAI-lab/learn-claude-code: Bash is all you need - A nano claude code–like 「agent harness」, built from 0 to 1github.com