Keep the AG-UI .NET SDK docs (sdks/dotnet/AGENTS.md and docs/architecture.md) in sync with the real code tree after structural changes. USE FOR: "update AGENTS.md / docs/architecture.md", "check the dotnet docs are current", verifying docs after a .NET SDK refactor (package rename, added/removed project, changed endpoint pattern, new/renamed test project, sample step added, new convention). DO NOT USE FOR: writing product code or tests (follow AGENTS.md itself), Python/TypeScript SDK docs, or generic markdown editing unrelated to the dotnet SDK structure.