Daily notes on .NET, C#, EF Core, MAUI, Blazor, and Flutter - for developers who ship.

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.

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.

A complete guide to shipping a Flutter web app compiled to WebAssembly on Flutter 3.44: what the two emitted builds look like, why Firefox and Safari still get JavaScript because of the loader's wasmAllowList, migrating off dart:html for dart2wasm, the COOP/COEP headers that decide whether skwasm runs multi-threaded, and how to prove at runtime which build the browser actually loaded.

A complete guide to passing data through Shell navigation in .NET MAUI 11: registering global routes, string query parameters, QueryPropertyAttribute vs IQueryAttributable, the URL-decoding asymmetry between the two, single-use ShellNavigationQueryParameters vs the IDictionary overload that leaks, passing data backwards with ..?key=value, and why QueryPropertyAttribute is not trim safe.

Two ways to make a coding agent land its own work: Claude Code 2.1.198+ background sessions commit, push, and open a draft PR from their worktree with no config, or wrap any agent CLI in a git worktree plus gh pr create --draft. Covers the worktree guardrails, the subagent-vs-session distinction, the GITHUB_TOKEN trigger trap, and why there is still no off switch.

Cursor Router shipped on July 22, 2026. Auto now classifies every request and routes it to a different model, and the Cost, Balance, and Intelligence modes change both the quality you get and how you are billed.

A complete workflow for finding a managed memory leak in .NET 11: confirm growth with dotnet-counters, take two gcdumps and diff them, then collect a dump and use dumpheap, gcroot, and objsize in dotnet-dump analyze to find what is still holding the reference.

A complete guide to building container images from a .NET 11 app with no Dockerfile: the PublishContainer target, ContainerRepository and ContainerImageTags, base image selection through ContainerBaseImage and ContainerFamily, pushing to a registry and how authentication resolves, multi-arch OCI image indexes, the non-root default user, entrypoint control, tarball output for scanners, and the cases where you still need a Dockerfile.

A complete guide to polymorphic JSON in .NET 11: JsonDerivedType and JsonPolymorphic, why the declared type decides everything, the $type ordering rule, every exception the feature throws, the contract model for types you do not own, and what ASP.NET Core emits in OpenAPI.

By default a headless Claude Code run emits only tool_use and tool_result blocks from its subagents, so the delegated reasoning is invisible. Pass --forward-subagent-text (Claude Code 2.1.211+) to get subagent text and thinking in the stream-json output, and demultiplex it by parent_tool_use_id.