How to Build Planning Into Your Agent (The Architecture That Actually Works)

In 2025, the anticipated rise of agents fell short due to their inability to handle complex workflows effectively, which was attributed to a lack of planning rather than capability. The article discusses how the integration of structured planning tools into Alyx 2.0 transformed it from a basic task executor into a sophisticated workflow orchestrator. By implementing a system where planning is treated as a structured tool call rather than a prompt instruction, Alyx was able to maintain focus on multi-step tasks, manage its progress through four task statuses (pending, in_progress, completed, blocked), and ensure completion before finishing any task. The article highlights the importance of maintaining the plan's visibility throughout interactions, with the plan being consistently updated and positioned directly after the system prompt. This structured approach not only improved task completion rates but also unlocked emergent capabilities such as the ability to autonomously chain prompts together. The authors emphasize that this planning framework, which is adaptable and enforces completion through tool-level validation, is crucial for developing agents capable of handling complex workflows.

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