Start Debugging

Tag: observability

8 posts

2026-09-22 dotnet opentelemetry observability

OpenTelemetry .NET 1.19.1 fixes the wildcard NotSupportedException on net8.0

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.

2026-09-21 aspnet-core dotnet-10 logging

How to add the current user id to every log entry in ASP.NET Core

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.

2026-07-27 claude-code ai-agents subagents

How to Stream Nested Subagent Output From a Headless Claude Code Run

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.

2026-07-25 migration dotnet dotnet-11

Migrate from ILogger string interpolation to structured logging message templates in .NET 11

A step-by-step guide to converting $-interpolated ILogger calls into message templates and [LoggerMessage] source-generated methods on .NET 11: what breaks, how to sweep a codebase with CA2254, how to verify the JSON state, and how to roll back.

2026-07-12 cursor ai-agents llm

How to Observe a Cursor Cloud Agent's Prompts, Thinking, and Subagents with Hooks

Cursor 3.11 (July 10, 2026) lets cloud agents run hooks that see the conversation itself. Wire up beforeSubmitPrompt, afterAgentThought, afterAgentResponse, and subagentStart in .cursor/hooks.json to log every prompt, thinking block, and delegated task, then gate the risky ones.

2026-06-05 migration serilog opentelemetry

Migrate from Serilog to OpenTelemetry logging in .NET 11

A step-by-step guide to moving a .NET 11 app off Serilog and onto OpenTelemetry logging: the low-risk Serilog.Sinks.OpenTelemetry bridge, the full Microsoft.Extensions.Logging cut-over, what breaks, how to verify, and how to roll back.

2026-05-01 csharp dotnet dotnet-11

How to use OpenTelemetry with .NET 11 and a free backend

Wire OpenTelemetry traces, metrics, and logs into a .NET 11 ASP.NET Core app with the OTLP exporter, then ship them to a free, self-hosted backend: the standalone Aspire Dashboard for local dev, Jaeger and SigNoz for self-hosted production, and the OpenTelemetry Collector when you need both.

2026-04-12 aspnet-core dotnet-11 opentelemetry

ASP.NET Core 11 Ships Native OpenTelemetry Tracing: Drop the Extra NuGet Package

ASP.NET Core in .NET 11 Preview 2 adds OpenTelemetry semantic attributes directly to HTTP server activity, removing the need for OpenTelemetry.Instrumentation.AspNetCore.