Axe is a lightweight command-line tool for defining and running LLM-powered agents. Each agent is defined in a TOML file with its own system prompt, model selection, skills, and context. Agents can delegate to sub-agents, maintain persistent memory across runs, and be composed with standard Unix tools like pipes, cron, and git hooks. It supports multiple LLM providers including Anthropic, OpenAI, Ollama, and AWS Bedrock.