04 · ProductionGovernance & SafetyPerception ValidatorContext Integrator

Integrator.
Sanitize the percepts before reasoning touches them.

A validation pattern — a dedicated gate that validates all incoming information (percepts) for quality and consistency before it ever reaches the model.

In practiceA support agent's CRM lookup starts returning a `status` field that changed from a fixed enum to free text; the integrator rejects the payload against its schema and raises a typed error, instead of letting the model reason over a value it would silently misread.

When to reach for it

  • Data is received from unstructured or unreliable environments.
  • Cognitive data quality is essential to prevent hallucinations downstream.

When it backfires

  • Input data is already strictly sanitized and verified upstream.

The tradeoff

Higher data consistency is achieved against additional latency during perception processing.

The effect

What it actually does.

Incoming percepts pass a schema check; malformed ones take the error branch.

perceptschematyped stateerror branch
Pitfalls

Two ways this pattern will hurt you.

Validation runs but its verdict is ignored

The integrator flags a payload as invalid and the rest of the graph processes it anyway because the flag was never wired into the downstream router.

Fix · Reify the verdict as a typed state field. Add a conditional edge that routes invalid payloads to an explicit error branch.

The gate hardens until it rejects legitimate input

Each malformed payload tightens the schema a little further, until a legitimate variant the upstream system has always sent is rejected too — and the run dead-ends with no path forward.

Fix · Version the schema against the upstream system's documented contract, not against the last bad payload you saw; log rejected payloads with their reason so an over-tight rule becomes visible.

Framework support

Where Integrator is native.

LangGraphcustom nodeAdaptable
AllcustomAdaptable

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