Cursor 3.9 Bundles Your Agent Setup Into Portable Plugins
Cursor 3.9 ships a plugin system and a unified Customize page so skills, rules, MCP servers, commands, and hooks travel together as one versioned unit.
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Fix: LateInitializationError: Field '...' has not been initialized in Flutter
This crash means you read a late field before anything assigned it. Initialize it synchronously in initState, or stop using late and model the async value as nullable state.
Fix: Null check operator used on a null value in Flutter
The ! operator hit a null at runtime. Replace it with ?. and ?? for a safe default, or guard with an explicit null check, instead of asserting a value that was not there.
How to declare extension properties in C# 14
Extension properties land in C# 14 through the new extension block. Declare get-only, settable, static, and generic extension properties, why auto-properties are rejected, and how the compiler lowers them to get_/set_ accessors.
How to Run a Pre-Push Code Review Locally with Cursor Bugbot's /review
Cursor 3.7+ lets you run Bugbot before you push with the /review command. Here is how local review works, how the patch ID dedup stops you paying twice, and the one thing it cannot do yet.
How to Deploy a Microsoft Agent Framework Agent to Foundry Hosted Agents
A step-by-step guide to taking a Microsoft Agent Framework agent from your laptop to a managed Foundry Hosted Agent: the C# host code, the azd deploy flow, identity, scaling, and the gotchas that bite in preview.
.NET 11 Preview 5 lets file-based apps reference each other with `#:ref`
.NET 11 Preview 5 adds the #:ref directive so a dotnet run script can reference another file-based app as a library, with transitive references and no project file.
How to do keyset (cursor) pagination in EF Core 11
Replace Skip/Take with a WHERE clause that seeks past the last row you saw. Order by a fully unique key, carry the last row's values as a cursor, and EF Core 11 turns the next page into an index seek instead of an OFFSET scan.
How to map and query JSON columns in EF Core 11
Map a nested type to a single JSON column with ComplexProperty(...).ToJson(), let EF Core 11 store it in the native SQL Server 2025 json type, then query into it with LINQ that translates to JSON_VALUE, JSON_CONTAINS, and JSON_PATH_EXISTS.
How to register and resolve keyed services in .NET 11 dependency injection
Register more than one implementation of the same interface under a key with AddKeyedSingleton/Scoped/Transient, then resolve them with [FromKeyedServices], GetRequiredKeyedService, or KeyedService.AnyKey. The keyed and non-keyed registries are separate, which is the gotcha that bites most people.