Teams SDK (teams.net) to Agents SDK Migration (.NET)

Overview

When an automation caller supplies validation tools instead of shell access, use those tools to perform the build, tests, and startup checks required below. A current passing tool result is equivalent evidence; do not request unavailable shell access or claim validation from source inspection alone. Follow the caller's read-only role when reviewing.

Migrates a Teams SDK (teams.net, https://github.com/microsoft/teams.net) bot to a Microsoft 365 Agents SDK AgentApplication. The Teams SDK registers fluent event delegates (teamsApp.OnMessage(async context => ...)) on an IContext<T>; the Agents SDK routes activities to handler methods on an AgentApplication subclass using ITurnContext.

This is NOT the Bot Framework migration. If the project depends on Microsoft.Bot.Builder*, use bf-to-agents-sdk-dotnet-migration instead. Trigger this skill only for teams.net projects (Microsoft.Teams.Plugins.AspNetCore, Microsoft.Teams.Apps, Microsoft.Teams.Api).