## Why
Code Mode rendered document-local `$ref` values as `unknown`, hiding referenced
input and structured-output shapes from generated TypeScript declarations.
## What changed
- Resolve fragment-only JSON Pointer references against the root schema,
including escaped and percent-encoded pointer segments.
- Preserve `$ref` siblings as intersections and parenthesize unions used in
`allOf` intersections.
- Bound recursive and repeated expansion, intermediate rendering work, and
final output size, falling back to `unknown` when a limit is reached or a
reference cannot be resolved safely.
## Testing
Add unit coverage for recursive, escaped, nested-resource, dangling, and
oversized references, plus integration coverage for generated Code Mode tool
descriptions and MCP structured output types.
GitOrigin-RevId: 95c6aa32e25325b5be9359dfac3b3328e5e7a499
aphonpra-oai
a186f5484d