## Summary

## Public Surface

- [ ] No public SDK headers changed.
- [ ] Public SDK changes are marked core / optional / experimental.
- [ ] Runtime, gateway, policy, discovery, profile, CLI, or backend details do
      not leak into public SDK headers.
- [ ] Public renames keep compatibility aliases and migration notes.
- [ ] Breaking API changes have a design note or RFC issue.

## Tests

- [ ] Formatting checked.
- [ ] Focused unit tests run.
- [ ] Package smoke run when install/export behavior changed.
- [ ] Transport or interop tests run when transport behavior changed.

## Compatibility Notes
