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Claude Code 2.1.277 reads AGENTS.md natively, so Cursor, Claude Code, and most Copilot surfaces can now share one instructions file. Here is the checklist for merging three drifted rule files into AGENTS.md, which bridge files to delete, the one Copilot file you still have to generate, and a CI check that keeps them from drifting again.

StackExchange.Redis 3.3.0 adds opt-in maintenance notifications (smart client handoffs) for Redis Enterprise, Redis Cloud and Azure Managed Redis: relaxed timeouts during migrations, topology re-reads, and a proactive move before an endpoint goes away. Here is how to turn it on and the SER010 error you will hit first.

Keep a Flutter WebView on your own domain with webview_flutter 4.14.1: parse the URL, compare Uri.host instead of startsWith, hand mailto: and tel: to url_launcher, and know what Android and iOS actually send to onNavigationRequest.

Call .DisableAntiforgery() on the one endpoint, or on a MapGroup. In ASP.NET Core 11 that opts out of both the token middleware and the new automatic CSRF check. Measured matrix, precedence traps, and narrower alternatives.

Run a Flutter location tracker that survives the Home button, a swipe from recents and a reboot on Android 15 and 16: a location-typed foreground service in its own Flutter engine, the exact permissions, and the SecurityException you get when the while-in-use rules bite. Tested with geolocator 14.0.3 and flutter_foreground_task 11.0.3.

OpenTelemetry 1.19.0 switched its wildcard source regex to RegexOptions.NonBacktracking, which throws on net8.0 once you register enough sources. 1.19.1, released on September 21, 2026, goes back to a compiled regex with a match timeout.

A side chat branches off what the agent already knows; a subagent goes and finds out something new. Claude Code's /btw has no tools at all, Cursor's /btw opens a full agent, and a plain subagent sees none of your conversation. A decision guide for Claude Code 2.1.278 and Cursor 3.11+.

Before Aspire 13.5.4, every AppHost health check on an AddKafka resource created a new Confluent producer that nobody disposed, so polling threads piled up and the AppHost burned CPU. The fix, and the HealthCheckRegistration.Factory trap behind it, applies to your own health checks too.

A BeginScope middleware misses the exception handler's error log and the Request finished line. Register an ILogEnricher that reads the user from IHttpContextAccessor, open a scope only when work leaves the request, and watch out for Serilog's AddSerilog silently cancelling enrichment.

Loading an entity, calling List.Add, and saving rewrites the whole jsonb document and silently loses concurrent appends. Push the append into one UPDATE with the jsonb || operator, either through ExecuteSqlAsync or a mapped function inside ExecuteUpdateAsync, and make it idempotent with a @> guard.