Loop Engineering

Bounded state machines, termination contracts, recovery, idempotency, budgets, no-progress detection, and replayable agent loops.

Not started3 min explanation

Visualize, practice, and deep-dive material are optional—use only what helps you learn.

Explanation

A focused 3-minute explanation using the topic's authored material.

Learning goals and prerequisites

After this lesson

Model a bounded execution loop
Design termination and recovery contracts
Evaluate trajectories, effects, and replay

Helpful before starting

Agent and tool-use fundamentals
Typed application state
Testing and API error handling

Start here

Loop Engineering, in plain language

Bounded state machines, termination contracts, recovery, idempotency, budgets, no-progress detection, and replayable agent loops. Loop engineering turns repeated model decisions into a bounded, recoverable, observable transition system with explicit terminal behavior.

For a small example, a research task can search until it finds one cited answer. Represent running, succeeded, failed, and exhausted states; decrement a call budget; verify the citation before finishing. This is the mechanism to keep in view as the lesson becomes more technical. Before moving on, identify the input, transformation, output, and one observation that would falsify your conclusion.

Key points

Typed state, actions, observations, and terminal reasons.
Deterministic workflow versus model decision boundaries.
Success, failure, cancellation, and deadline semantics.

Use it well

When Loop Engineering helps—and where it breaks

A ticket update times out after the request is sent. Persist intent, reconcile the external ticket with an idempotency key, resume from a checkpoint, and verify the resulting state. A useful result still depends on checking the assumptions and evidence below rather than treating one successful output as proof.

Key points

Stopping when the model says it is done. Better approach: Verify a goal-specific postcondition.
Retrying an uncertain write blindly. Better approach: Use idempotency and reconcile external state.
Detecting loops from text alone. Better approach: Compare structured state, evidence, and effects.

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