[adamcavendish]

Summary

Add cargo run --example response_types to compare response field representations using existing APIs:

Target	Representation
TypeScript	Singleton-key Record intersections and Partial
Go	Alias for an anonymous struct
Dart 3	Named record
Swift	Labelled tuple
Python	Named TypedDict with NotRequired
Rust	Named struct
Kotlin	Named data class

The example prints all generated sources or writes them to a supplied directory. Focused tests protect TypeScript import aliases and optional-key composition, native fragment syntax, and named declarations. Run instructions live in the example itself, and the smoke suite runs it.

Boundaries

• No public API, lowering behavior, version, release metadata, or downstream consumer changes.
• These are target-associated examples, not interchangeable anonymous-record types.
• Only TypeScript and Python constrain status to 200; other targets use ordinary integer fields.
• Optional keys are distinct from nullable values. Numeric singleton leaves use the existing Raw escape hatch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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