Metrics support is officially ready! Download the Seq 2026.1 MSI, or pull datalust/seq:latest to upgrade. Read the release announcement at: datalust.co/blog/seq-202...

PSA, from Serilog 4.4.0, you can listen to the "Serilog" meter to receive logging pipeline counters via System.Diagnostics.Metrics: github.com/serilog/seri... #Serilog

Release v4.4.0 · serilog/serilog

What's Changed Emit SelfLog warning when extra arguments are provided by @matantsach in #2222 dont WriteQuotedJsonString for null by @SimonCropp in #2216 Pin System.Security.Cryptography.Xml to 8....

github.com

Twelve months of one of the most intense dev projects I've worked on. We had a lovely time designing our ideal interaction model, then embarked on the *massive* task of building a whole new distributed columnstore to drive it... 😅

Seq@datalust.co · 3mo ago

Seq 2026.1 previews are now shipping weekly! These add support for OpenTelemetry metrics ✨ and a completely new metrics discovery and visualization UI. Check out this post for how to get started: datalust.co/blog/metrics...

Quick question; we have a lot of variation between monitors on our dev machines. On yours, do the charts in this screenshot appear in little white boxes against a more grey background, or is the whole chart area just one big flat white canvas? Thanks! 😀

Signed up with @opentalk.eu after investigating a few Zoom alternatives; so far, so good! It's surprising just how much functionality is "table stakes" in that space, now; it's nice to see a segment with a bunch of viable offerings.

Saw this live; it's sure to strike some chords with my tool-making friends.

Frank Elavsky (he/him) ⌁@frank.computer · 7mo ago

A bootleg recording of my favorite talk I've ever given, "Tool-making, for good and evil," is now on youtube! (link below) Huge thanks to @larene.dev for recording, @damianm.com for convincing me to do it, and the awesome folks hosting (and in the audience) at @dddbrisbane.bsky.social, back in Dec.

I am excited to announce SharpDbg - a new cross platform, managed .NET debugger, written completely in C#! (No C++ required 💪) ⭐ Star it on GitHub! github.com/MattParkerDe... SharpDbg implements the VS Code Debug Adapter Protocol (DAP), ...

GitHub - MattParkerDev/sharpdbg: SharpDbg is a .NET managed code debugger supporting the VSCode DAP, implemented completely in C#/.NET

SharpDbg is a .NET managed code debugger supporting the VSCode DAP, implemented completely in C#/.NET - MattParkerDev/sharpdbg

github.com

The Seq team rounded out 2025 at DDD Adelaide and then DDD Brisbane a month later, both fantastic community-oriented conferences. Here's Ashley Mannix sharing his experiences shepherding Seq's high-performance #rustlang codebase through back-to-back years of rapid growth.

2025 was a year of the industry fixating on development velocity. 2026? The year of fixating on software reliability.

Have you ever thought about having unit tests for your unit tests? 🤔 If so, decent chance your testing isn't catching the bugs you need and is just slowing you down ⏱️ @Ashley Mannix at #DDDAdelaide 2025 shows how to test complex software, challenging what a test is 🧪

Liam McLennan shows us at #DDDAdelaide 2025 the power in using Metrics to gain observability at high volumes where logs simply don't work 📊. Join us to learn what metrics are, when they are useful, and how to actually collect and analyse them 📈🔍

One thing I started noticing recently is that competent engineers give up their credibility due to AI. Twice already highly competent engineers I respect sent a PR that turned out to have very subtle issues. These issues would not be possible if a human understood it.

Hope you're all doing okay out there 👋

I can't believe it's so rare to get a terse, sensible, un-pushy issue raised ahead of a PR that feel the need to micro-blog when it happens, but here you go 😂 github.com/serilog/seri...

Add support for NO_COLOR env var · Issue #130 · serilog/serilog-expressions

Hey! There is a slight inconsistency between different serilog console logging methods when it comes to support for NO_COLOR env variable. See https://no-color.org/ for the reasoning. Also there ha...

github.com

Building the Serilog sink for OpenTelemetry on OTLP, rather than the SDK, is turning out pretty well. It's super stable and in wide use at v4.2.0, while there's still no final SDK API for non-Microsoft loggers. Dependencies aren't inherently bad, but **schedule dependencies** almost always are.

Work Sharing in Seq Clusters ✨ blog.datalust.co/work-sharing...

Work Sharing in Seq Clusters

We've reviewed leader election and replication in Seq clusters. While these are tricky to get right, and involve nontrivial code, they're dwarfed in complexity by work sharing, which is the basis of S...

blog.datalust.co

The first 1.0M is the hardest 😉 www.nuget.org/packages/Ser...

Has anyone investigated writing an MCP server binding for System.CommandLine in #dotnet? Just poking around to keep up with what's going on in that space, seems like it could be an interesting quick bootstrapping option for existing codebases..?

Happy Firefox user, here, but I need to spend more dev time in Chromium-based browsers. Is the Chromium project itself the go-to privacy-conscious option? Any others I should take a look at? 🙏

We’re about to take C# to the next level! #dotnet #csharp

After me spending years maintaining a .NET state machine library, we implemented the core node state machine in plain old C# 😅 Couldn't be happier - states as classes, trigger handlers as switch statements returning new states, it's such nice, clear, direct code I don't think I'll look back....

Seq@datalust.co · last yr.

A peek into the delicate machinery that adapts a running Seq node to its role in the cluster: blog.datalust.co/leader-elect...

Since data movement has such a huge impact on performance in distributed systems, we did a bit of work cleaning up Seq's query plans in 2025.1, and now explicitly show the send/receive operations that connect computations locally and over the network. Still not perfect, but getting closer! 😁

Today's the day! Seq 2025.1 is ready at datalust.co/download, and on Docker Hub/ECR 😎 Find out what's new in the release announcement 👉 blog.datalust.co/announcing-s...

Seq — centralized structured logs

Seq is the self-hosted search, analysis, and alerting server built for structured log data.

datalust.co

Hello, world! 👋

What I've been up to for the past year: blog.datalust.co/seq-clusteri..., and one of the toughest things to ship that I've ever worked on 😅

It's time to prepare for Seq Clustering!

Now in preview, Seq 2025.1 introduces high availability (HA), scale-out clustering in the Datacenter subscription tier. * Seq 2025.1 clusters continue ingesting data and serving queries even when on...

blog.datalust.co

Today's "quick-and-dirty" hack turned out quite nicely; a Seq relay (replication/forwarder) plug-in that properly handles traces, OTLP envelope properties, etc.: github.com/nblumhardt/s...

GitHub - nblumhardt/seq-app-relay: A simple HTTP/JSON forwarder that preserves all event metadata.

A simple HTTP/JSON forwarder that preserves all event metadata. - nblumhardt/seq-app-relay

github.com

Whoah, just spiked replacing Seq's internal cluster HTTP proxy with #aspnetcore's YARP, and once I remembered to register its service dependencies, it Just Works™️ first try, WebSockets and all. That's the mark of a nice piece of software, going to have to dig into this thing 😎

The option to build a complementary product or service isn't viable for everyone, but for high-use libraries, it's within reach a lot of the time. When you build one of these things, you end up a bit of a domain expert, and have a high chance of seeing the gaps and opportunities others won't...

Surprised to see a few posts like this lately. I've been strongly anti-license-switch for as long as this stuff has been going on, but perhaps not loud enough. There is no future in which this will happen. The #serilog project doesn't even accept donations! It's by the community, for the community.

iBRAR 🍉@ibrar-dev.bsky.social · 2y ago

What would break the dotnet csharp world right now, would be if #serilog followed suit and did the same thing. May companies would be forced to engineer away to alternatives or pay for license. As logging is not a straight forward thing to replace.

The apparent end of the CVE database caught me by surprise... Aside from fragmented means like GitHub tickets and mailing lists, how is everyone expecting to receive vulnerability notifications going forward? No viable replacement in the wings?