News

CritterWatch 1.0.0-alpha.1 is loose on NuGet — a monitoring and production-management console for Wolverine, Marten, and Polecat that doubles as dev-time insight and an MCP control surface for your AI agents.

Polecat is an event store and lightweight document database for .NET, backed by SQL Server 2025. It brings the proven Marten development model — same IDocumentStore API, projections, and async daemon — to SQL Server shops without a database migration.

The .NET community keeps relitigating Result types vs. exceptions for error handling. With Wolverine you mostly get to opt out of that whole debate — let the framework handle the 404s, the 400s, and the OpenAPI metadata while your code stays clean of both Result wrappers and exception-as-control-flow.

CritterWatch 0.8.0 is the largest release yet — a purpose-built monitoring and operations console for the Critter Stack with production observability, development-time insight, and an MCP control surface built for AI agents.

Why the Critter Stack and Wolverine are the best foundation for vertical slice architecture in the age of AI coding agents — aggressive code compression, locality of reference, and conventions encoded in AI skill files.

Wolverine, the low-ceremony .NET application framework for asynchronous messaging, HTTP endpoints, and CQRS, just passed five million NuGet downloads — with a million in the last six weeks alone.

The Critter Stack 2026 releases have landed: faster cold starts, AOT compliance, better Serverless support, and new greenfield defaults across Marten, Polecat, and Wolverine.

JasperFx Software's officially curated AI Skills for the Critter Stack are now available for purchase — continuously improved guidance that helps AI coding agents write idiomatic Marten, Polecat, and Wolverine code.

Wolverine.HTTP is a first-class HTTP framework for ASP.NET Core built for vertical slice architecture — low ceremony, no Mediator library, built-in transactional outbox, and middleware more powerful than IEndpointFilter.

Wolverine has a strong development and production-time story for EF Core developers — transactional middleware, automatic outbox/inbox, runtime database migrations, test data resets, and declarative persistence.

How to build the most efficient possible HTTP query endpoints in .NET by streaming JSON straight from PostgreSQL with Marten — using Marten.AspNetCore's WriteArray and compiled queries with zero C# allocation.

Polecat is a new JasperFx library that brings Marten's proven Event Sourcing and document database model to SQL Server 2025 — the best technical option for Event Sourcing with SQL Server in .NET.