Agents SDK ActivityHandler → AgentApplication Migration (.NET)

Overview

Upgrades a bot from the ActivityHandler compat layer to the modern AgentApplication routing pattern. This is ONLY for DotNet projects that already use Microsoft.Agents.* packages. If the project is still using Microsoft.Bot.* packages the bf-to-agents-sdk-dotnet-migration skill should be used first.

Two entry points:

• Standalone: The bot already uses Microsoft.Agents.* packages, namespaces, and appsettings — focus is on the bot class, Program.cs, and endpoint mapping.
• Second step after bf-to-agents-sdk-dotnet-migration: Packages, namespaces, and appsettings were converted in that step — this skill handles the AgentApplication conversion.

What Does NOT Need to Change

Verify each of these is already correct — do not modify unless broken: