What problem does it solve? Answering "how does X work" in an unfamiliar codebase requires hours of manual code reading, and architectural questions like "where should this live" or "is this the right layer" demand a synthesized mental model that is hard to build alone. ## Core Features & Use Cases - Explain Mode: Decomposes complex subsystem questions into parallel explorer agents that trace code paths, then synthesizes findings into a structured architectural explanation with overview, key concepts, flow, file map, and gotchas. - Critique Mode: After explaining, spawns multiple independent model critics that evaluate the architecture against a rubric covering abstraction fit, data model, boundary discipline, and evolution readiness, with findings triaged by a lead judgment pass. - Use Case: Before modifying a billing flow, ask how on-demand usage billing works and receive a senior-engineer-level walkthrough of the trigger, data flow, decision points, and the files you need to touch, plus an optional architectural critique. ## Quick Start Ask how the rate limiter subsystem works and request an architectural explanation before making changes.