OperationId
Class 4. Decisions Outside Code — yongol and Declarative Full-Stack Control
AI can't distinguish decisions from implementation details mixed in code — that's the root cause of drift. yongol separates decisions into 10 declarative specifications and catches contradictions across layers with 287 rules.
Feature Chain — Tracing the full stack with one operationId
Which files do you need to touch to modify a single feature? Feature Chain takes one operationId and automatically extracts the entire scope — API spec, DB schema, authorization policy, state diagram, function implementations, test scenarios, and frontend.