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CoursesAgent Harnesses in Practice

Routing and Fleets

One key in front of many models, the two routing layers, the provider rules that pin or spread, fallback lists and the auto router, and one person's view over a fleet of agents.

Lessons
6
Exercises
34
Minutes
37

Start One Key, Many Models

  1. 1

    One Key, Many Models

    After this lesson you can read an OpenRouter request and its response, name the two routing layers, and predict which provider is likely to serve a request by default.

    Multiple choiceTapTrace
    5 exercises
    5 min
  2. 2

    The Provider Object

    After this lesson you can read a provider block key by key, say which keys pin the choice and turn balancing off, and write one that meets a price and a data rule.

    DebugFill blankMultiple choice
    5 exercises
    5 min
  3. 3

    Fallbacks and the Auto Router

    After this lesson you can read a fallback list and an auto-router block, pick a cost tier as a band rather than a ceiling, and explain a 404 that says no models match.

    DebugCode orderMultiple choice
    5 exercises
    6 min
  4. 4

    Many Agents, One Human

    After this lesson you can read a sidebar of running agents as a queue, attend the pane that is waiting on you first, give new work to a free pane, and keep one task per pane.

    DebugMultiple choiceTapTrace
    5 exercises
    6 min
  5. 5

    Checkpoint: Routing and FleetsCheckpoint

    Two layers, the provider rules, tiers as bands, and the sidebar as a queue, in fresh situations.

    DebugFill blankMultiple choiceTap
    6 exercises
    6 min
  6. 6

    Boss: Survive a Provider Outage on Launch DayBoss

    One launch morning: read the error, prove who answered, unpin the provider, cap the price, then read the fleet, catch the risky push, and hand off.

    DebugCode orderFill blankMultiple choiceTapTrace
    8 exercises
    9 min