Fix: .mcp.json servers never start because the workspace is marked untrusted
Project MCP servers stuck at Pending approval are not misconfigured. Run claude interactively in the folder, accept the workspace trust dialog, then approve the servers.
Blog
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Fix: Your startup project doesn't reference Microsoft.EntityFrameworkCore.Design
Add Microsoft.EntityFrameworkCore.Design to the startup project that dotnet ef builds, not the project holding your DbContext, and pass -s in layered solutions.
Visual Studio 18.9 Lets You Set Thinking Effort Per Model
Visual Studio 18.9 Insiders 2 adds a per-model thinking effort control with Low through Max levels, exposing the same reasoning-effort dial the underlying model APIs take.
Fix: Couldn't find a valid ICU package installed on the system in a .NET container
Your base image has no ICU. Either install icu-libs and icu-data-full, switch to an -extra image variant, or set InvariantGlobalization=true and accept ordinal-only string behavior.
Fix: Reflection-based serialization has been disabled for this application
This InvalidOperationException means PublishTrimmed or PublishAot flipped JsonSerializerIsReflectionEnabledByDefault to false. Fix it with a source-generated JsonSerializerContext.
Fix: "The model for context 'X' has pending changes" in EF Core 11
EF Core throws PendingModelChangesWarning when your model no longer matches the last migration snapshot. Add the migration, or fix the false positive behind it.
Fix: a Windows path in your agent config silently turns into a tab, a newline, or a Chinese character
Folder names starting with t, b, n, r or u make a Windows path parse cleanly as JSON and still resolve wrong. Use forward slashes or double every backslash.
MCP C# SDK 2.0 Ships: Stateless by Default and MCP9005 on Your Old Code
ModelContextProtocol 2.0.0 landed on 2026-07-28 with the stateless HTTP transport on by default, Multi Round-Trip Requests replacing server-initiated elicitation, and an analyzer warning on ElicitAsync and SampleAsync.
GitHub's MCP Server Went Stateless and Deleted Its Redis Session Store
On 2026-07-23 GitHub shipped the MCP 2026-07-28 revision ahead of the spec date. The notable part is the subtraction: no initialize handshake, no Mcp-Session-Id, no Redis.
How to apply EF Core 11 migrations in production with dotnet ef migrations bundle
A complete guide to deploying EF Core 11 schema changes with migration bundles: building efbundle in CI, the appsettings.json trap with named connection strings, self-contained bundles and the Alpine musl RID, migration locking since EF Core 9, rolling back with a target migration, and why per-migration transactions do not save you on MySQL.