Page 2 of 8~120 min topic

Multi-agent in code

Define the research-critique coordinator input contract

Page 2 hardens the boundary around the research+critique coordinator so bad inputs fail before the interesting algorithm runs.

~15 min this pageData contract

1Learn the idea

Read

Define what may enter

The accepted input remains: user brief, research worker, critique worker, merge policy. Keep parsing and normalization in functions that do not score, train, or call a model. That split lets a test fail the boundary without blaming the core logic. The user-facing decision stays: delegate research and critique to two bounded workers, then merge under a coordinator policy.

Read

Reject at the boundary

const workers={research:{maxSteps:2}, critique:{maxSteps:1}};
console.log({workers, sharedMutableState:false});

Expected evidence: worker budgets. If the contract is silent on a bad value, later debugging will look like an algorithm bug when it is really a data bug.

Read

Keep transforms testable

Write one assertion for a neighboring valid input to the research-critique coordinator so tightening the boundary does not over-reject. Document field names and types the way a teammate would need them on day two of multi-agent-in-code—not as comments you plan to delete.

Read

Lab notebook: name the fields

List every field in two workers with separate step budgets and mark each as required, optional, or forbidden. Required fields must fail loudly when missing; optional fields need defaults you can quote in a test; forbidden fields (secrets, raw PII, path escapes) must never be accepted silently. This list is the contract for the research-critique coordinator.

Add one sentence about encoding, units, or timezones if relevant to user brief, research worker, critique worker, merge policy. Contracts that ignore units create “correct” programs that still ship wrong decisions when someone tries to delegate research and critique to two bounded workers, then merge under a coordinator policy.

Read

Worked judgment

Write the error string you want for the most likely bad input. Prefer ValueError('threshold out of range')-style messages over generic invalid input. The contract’s job is to make workers sharing mutable state, or coordinator ignoring critique veto harder to confuse with a model or algorithm bug later.

Read

Why this stage matters for the research-critique coordinator

At the data contract stage for multi-agent-in-code, the job is narrower than finishing a product demo. You are creating one progressive evidence piece about two workers with separate step budgets that later pages inherit without redefining success. Keep that fixture small enough to inspect by hand, keep outputs copy-pasteable as text, and refuse to narrate this baseline as if it were a production SLA: single agent without critique pass.

For this page specifically, success looks like malformed inputs rejected with field-named errors while still centering the user decision to delegate research and critique to two bounded workers, then merge under a coordinator policy. If you cannot point to a file, command, or assertion that proves that for the research-critique coordinator, stay on this page instead of advancing.

Glossary: tool · Glossary: structured output · Cheatsheet: production ops signals

Previous · Next

Go deeper

Before you start

Why this matters

Invent one malformed input that the research+critique coordinator might accidentally accept. Predict the exception or rejection message. After you run the contract code, compare your prediction with the real failure text.

In the wild

See how this idea shows up as a product and a company — then come back to the lesson. Skills transfer across vendors.

Check your understanding

Page assessment

Answer from memory. Completion is saved from this evidence, not from opening the next page.

1. Which malformed values die before core logic?
2. Can transform and prediction/search be tested separately?
3. Does the error name the violated field or shape?
4. Is the accepted input still exactly: user brief, research worker, critique worker, merge policy?

All responses are required.