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* Lazy load root agent_framework exports Move the root public API to lazy runtime exports backed by a typed stub, keep Runner deprecation handling in the owning workflow runner module, and document the maintenance pattern. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Tighten harness factory typing Add a private harness stub so create_harness_agent has a fully known public signature without depending on agent-framework-tools at runtime. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Address lazy root export review comments Harden the circular import guard and add root export smoke tests covering representative lazy imports, star imports, and root stub export synchronization. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>