Reply to @jeffhandley: Summarize breaking changes as API and behavioral bullets#1312
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Copilot wants to merge 1 commit intombuck/session-migration-handlerfrom
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Reply to @jeffhandley: Summarize breaking changes as API and behavioral bullets#1312Copilot wants to merge 1 commit intombuck/session-migration-handlerfrom
Copilot wants to merge 1 commit intombuck/session-migration-handlerfrom
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[WIP] Add ISessionMigrationHandler to support session migration
Reply to @jeffhandley: Summarize breaking changes as API and behavioral bullets
Feb 19, 2026
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@jeffhandley requested a summary of breaking changes introduced by the session migration PR. Replied to the PR comment with structured bullets covering:
Mcp-Session-Idnow return400unless the body is aninitializerequest.StreamableHttpServerTransport.HandleInitRequestAsyncpromoted topublic;ClaimsPrincipal? userparameter removed.SessionMigrationHandlerproperty replaced byOnSessionInitialized(Func<InitializeRequestParams, CancellationToken, ValueTask>).ISessionMigrationHandlerinterface inModelContextProtocol.AspNetCore; newMcpServerOptions.KnownClientCapabilitiesproperty.✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.