#control theory

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A cork problem-tracking board in a bright research lab, one new index card held by a single pin driven only halfway in, red threads already radiating from the older cards around it

The Hardest Unsolved Problems in AI Agent Architecture

Five structural problems in agent design remain open by the field's own account — long-horizon credit assignment, durable state, multi-agent coordination cost, action verification, and silent sub-task failure.

By Brecht Corbeel · August 12, 2026 · 17 min read

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