Build self-improving agent system with Fable 5 in 14 steps : loops, dynamic workflows, routines
This article provides a detailed 14-step roadmap for building a self-improving agent system using Claude Fable 5. It moves Fable 5 from a prompt-and-close tool to a compounding system: using /goal and Outcomes for self-correcting loops, independent verifier sub-agents over self-critique, state files (STATE.md) and Skills for cross-session memory, and Dynamic Workflows and Routines for long-running autonomy. It includes a cost-capability matrix (Fable 5 for orchestration, Sonnet 4.6 for workers, Haiku 4.5 for graders) and guidance on handling the Mythos safety boundary. Suitable for AI engineers and system designers aiming to leverage Fable 5's days-long autonomous capability.