Stanford drops 45-min SpaceX lecture on how Grok Bot's always-on agent harness works

Hesamation · x · 2026-10-16

Stanford CS146S published a 45-minute lecture from SpaceX on how Grok Bot works, framed as a harness-engineering masterclass. Topics: what changed in the models to enable always-on agents, the architecture of an always-on agent, harness design, and context engineering for long tasks.

A slide explains why the agent runs server-side: thin client / thick server, work continues when the laptop closes, seamless phone-desktop handoff, shipping code without App Store review, offloading heavy work, a fully decoupled agent loop, easier scaling, and the point that agents running for months can't live on-device.

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