In traditional systems:
- →APIs validate inputs
- →Databases enforce constraints
- →Services reject invalid state
LLM systems skip this layer. They treat model output as trusted input. That's the architectural flaw.
Correct System Design
LLM → proposal Control layer → validation Execution → constrained action
Where validation includes:
- →schema enforcement
- →semantic checks (IDs, values, constraints)
- →cross-field consistency
- →state transition rules
- →rejection of unverifiable outputs
How the System Behaves Differently
- →Invalid outputs don't execute
- →Retries are bounded
- →state remains consistent
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