Loop Engineering

Replacing yourself as the agent's prompter by designing the system that prompts it: a recursive-goal loop built from five product-native primitives (automations, worktrees, skills, connectors, sub-agents) plus external memory; tool-agnostic across Codex and Claude Code; the leverage point moves from prompt-crafting to loop-design; Anthropic's 20–30 daily self-maintenance routines per codebase are the deployed endpoint