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System Design

Day-2 Operations

Keep a deployed agent good: burn-rate SLOs at a low target, detection for failures that throw no error, runbooks made of levers, and retirement as a dated migration.

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After this section you can

  • Derive an error budget and burn-rate thresholds for a quality SLO
  • Detect and contain a silent quality failure without a deploy
  • Plan a forced model retirement as a dated migration
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Day-2 Operations

Set SLOs that catch a failure with no error, stop it with a lever that needs no deploy, and retire a model on a dated plan.

Key idea

An agent gets worse while nothing deploys. Measure the outcome against an SLO, detect failures that throw no error, stop them with a lever, then add an eval case.

Nothing pages when an agent is wrong: a probe catches it, a lever stops it, an eval case keeps it stopped.
WHAT YOU SEE WHAT CATCHES IT, STOPS IT, KEEPS IT STOPPED Dashboards green, 200 OK Deploys none Answers wrong, confident nothing pages: no error, no deploy 1 Probe known questions, every 15 to 30 min catches it 2 Lever a flag or config, no deploy stops it 3 Eval case the failure joins the eval set keeps it stopped its questions join the probe set too

Pans sideways on a phone.

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