Guardian Agent

An AI agent whose primary role is defensive — monitoring for quality degradation, policy violations, or system drift. Guardian agents observe rather than create, intervening only when defined thresholds are crossed. Examples include gate wardens, validation agents, and sentinel watchers.

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Designing Contextual Watchers: AI Agent Monitoring Patterns That Catch Problems Before They Propagate

A practitioner's guide to defensive AI agent design — thin-slice expert watchers that monitor quality, scope, and consistency dimensions with defined trigger conditions, evaluation criteria, and response actions.

Building Your PO Agent System: From Separate Tools to Compounding Architecture

A practitioner's guide to building a complete PO agent system — named subagents with defined roles, a shared brain connecting them, an interface layer for interaction, and a self-improvement loop that makes the system compound over time.

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